Reorder arguments for av_fifo_generic_read to be more logical and

[libav.git] / ffmpeg.c

/*
 * FFmpeg main
 * Copyright (c) 2000-2003 Fabrice Bellard
 *
 * This file is part of FFmpeg.
 *
 * FFmpeg is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * FFmpeg is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with FFmpeg; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

/* needed for usleep() */
#define _XOPEN_SOURCE 600

#include "config.h"
#include <ctype.h>
#include <string.h>
#include <math.h>
#include <stdlib.h>
#include <errno.h>
#include <signal.h>
#include <limits.h>
#include <unistd.h>
#include "libavformat/avformat.h"
#include "libavdevice/avdevice.h"
#include "libswscale/swscale.h"
#include "libavcodec/opt.h"
#include "libavcodec/audioconvert.h"
#include "libavutil/fifo.h"
#include "libavutil/avstring.h"
#include "libavformat/os_support.h"

#if HAVE_SYS_RESOURCE_H
#include <sys/types.h>
#include <sys/resource.h>
#elif HAVE_GETPROCESSTIMES
#include <windows.h>
#endif

#if HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif

#if HAVE_TERMIOS_H
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <termios.h>
#elif HAVE_CONIO_H
#include <conio.h>
#endif
#undef time //needed because HAVE_AV_CONFIG_H is defined on top
#include <time.h>

#include "cmdutils.h"

#undef NDEBUG
#include <assert.h>

#undef exit

const char program_name[] = "FFmpeg";
const int program_birth_year = 2000;

/* select an input stream for an output stream */
typedef struct AVStreamMap {
    int file_index;
    int stream_index;
    int sync_file_index;
    int sync_stream_index;
} AVStreamMap;

/** select an input file for an output file */
typedef struct AVMetaDataMap {
    int out_file;
    int in_file;
} AVMetaDataMap;

static const OptionDef options[];

#define MAX_FILES 20

static AVFormatContext *input_files[MAX_FILES];
static int64_t input_files_ts_offset[MAX_FILES];
static double input_files_ts_scale[MAX_FILES][MAX_STREAMS];
static AVCodec *input_codecs[MAX_FILES*MAX_STREAMS];
static int nb_input_files = 0;
static int nb_icodecs;

static AVFormatContext *output_files[MAX_FILES];
static AVCodec *output_codecs[MAX_FILES*MAX_STREAMS];
static int nb_output_files = 0;
static int nb_ocodecs;

static AVStreamMap stream_maps[MAX_FILES*MAX_STREAMS];
static int nb_stream_maps;

static AVMetaDataMap meta_data_maps[MAX_FILES];
static int nb_meta_data_maps;

static AVInputFormat *file_iformat;
static AVOutputFormat *file_oformat;
static int frame_width  = 0;
static int frame_height = 0;
static float frame_aspect_ratio = 0;
static enum PixelFormat frame_pix_fmt = PIX_FMT_NONE;
static enum SampleFormat audio_sample_fmt = SAMPLE_FMT_NONE;
static int frame_padtop  = 0;
static int frame_padbottom = 0;
static int frame_padleft  = 0;
static int frame_padright = 0;
static int padcolor[3] = {16,128,128}; /* default to black */
static int frame_topBand  = 0;
static int frame_bottomBand = 0;
static int frame_leftBand  = 0;
static int frame_rightBand = 0;
static int max_frames[4] = {INT_MAX, INT_MAX, INT_MAX, INT_MAX};
static AVRational frame_rate;
static float video_qscale = 0;
static uint16_t *intra_matrix = NULL;
static uint16_t *inter_matrix = NULL;
#if 0 //experimental, (can be removed)
static float video_rc_qsquish=1.0;
static float video_rc_qmod_amp=0;
static int video_rc_qmod_freq=0;
#endif
static const char *video_rc_override_string=NULL;
static int video_disable = 0;
static int video_discard = 0;
static char *video_codec_name = NULL;
static int video_codec_tag = 0;
static int same_quality = 0;
static int do_deinterlace = 0;
static int top_field_first = -1;
static int me_threshold = 0;
static int intra_dc_precision = 8;
static int loop_input = 0;
static int loop_output = AVFMT_NOOUTPUTLOOP;
static int qp_hist = 0;

static int intra_only = 0;
static int audio_sample_rate = 44100;
static int64_t channel_layout = 0;
#define QSCALE_NONE -99999
static float audio_qscale = QSCALE_NONE;
static int audio_disable = 0;
static int audio_channels = 1;
static char  *audio_codec_name = NULL;
static int audio_codec_tag = 0;
static char *audio_language = NULL;

static int subtitle_disable = 0;
static char *subtitle_codec_name = NULL;
static char *subtitle_language = NULL;

static float mux_preload= 0.5;
static float mux_max_delay= 0.7;

static int64_t recording_time = INT64_MAX;
static int64_t start_time = 0;
static int64_t rec_timestamp = 0;
static int64_t input_ts_offset = 0;
static int file_overwrite = 0;
static int metadata_count;
static AVMetadataTag *metadata;
static int do_benchmark = 0;
static int do_hex_dump = 0;
static int do_pkt_dump = 0;
static int do_psnr = 0;
static int do_pass = 0;
static char *pass_logfilename_prefix = NULL;
static int audio_stream_copy = 0;
static int video_stream_copy = 0;
static int subtitle_stream_copy = 0;
static int video_sync_method= -1;
static int audio_sync_method= 0;
static float audio_drift_threshold= 0.1;
static int copy_ts= 0;
static int opt_shortest = 0;
static int video_global_header = 0;
static char *vstats_filename;
static FILE *vstats_file;
static int opt_programid = 0;
static int copy_initial_nonkeyframes = 0;

static int rate_emu = 0;

static int  video_channel = 0;
static char *video_standard;

static int audio_volume = 256;

static int exit_on_error = 0;
static int using_stdin = 0;
static int verbose = 1;
static int thread_count= 1;
static int q_pressed = 0;
static int64_t video_size = 0;
static int64_t audio_size = 0;
static int64_t extra_size = 0;
static int nb_frames_dup = 0;
static int nb_frames_drop = 0;
static int input_sync;
static uint64_t limit_filesize = 0;
static int force_fps = 0;

static int pgmyuv_compatibility_hack=0;
static float dts_delta_threshold = 10;

static unsigned int sws_flags = SWS_BICUBIC;

static int64_t timer_start;

static AVBitStreamFilterContext *video_bitstream_filters=NULL;
static AVBitStreamFilterContext *audio_bitstream_filters=NULL;
static AVBitStreamFilterContext *subtitle_bitstream_filters=NULL;
static AVBitStreamFilterContext *bitstream_filters[MAX_FILES][MAX_STREAMS];

#define DEFAULT_PASS_LOGFILENAME_PREFIX "ffmpeg2pass"

struct AVInputStream;

typedef struct AVOutputStream {
    int file_index;          /* file index */
    int index;               /* stream index in the output file */
    int source_index;        /* AVInputStream index */
    AVStream *st;            /* stream in the output file */
    int encoding_needed;     /* true if encoding needed for this stream */
    int frame_number;
    /* input pts and corresponding output pts
       for A/V sync */
    //double sync_ipts;        /* dts from the AVPacket of the demuxer in second units */
    struct AVInputStream *sync_ist; /* input stream to sync against */
    int64_t sync_opts;       /* output frame counter, could be changed to some true timestamp */ //FIXME look at frame_number
    /* video only */
    int video_resample;
    AVFrame pict_tmp;      /* temporary image for resampling */
    struct SwsContext *img_resample_ctx; /* for image resampling */
    int resample_height;

    int video_crop;
    int topBand;             /* cropping area sizes */
    int leftBand;

    int video_pad;
    int padtop;              /* padding area sizes */
    int padbottom;
    int padleft;
    int padright;

    /* audio only */
    int audio_resample;
    ReSampleContext *resample; /* for audio resampling */
    int reformat_pair;
    AVAudioConvert *reformat_ctx;
    AVFifoBuffer *fifo;     /* for compression: one audio fifo per codec */
    FILE *logfile;
} AVOutputStream;

typedef struct AVInputStream {
    int file_index;
    int index;
    AVStream *st;
    int discard;             /* true if stream data should be discarded */
    int decoding_needed;     /* true if the packets must be decoded in 'raw_fifo' */
    int64_t sample_index;      /* current sample */

    int64_t       start;     /* time when read started */
    int64_t       next_pts;  /* synthetic pts for cases where pkt.pts
                                is not defined */
    int64_t       pts;       /* current pts */
    int is_start;            /* is 1 at the start and after a discontinuity */
} AVInputStream;

typedef struct AVInputFile {
    int eof_reached;      /* true if eof reached */
    int ist_index;        /* index of first stream in ist_table */
    int buffer_size;      /* current total buffer size */
    int nb_streams;       /* nb streams we are aware of */
} AVInputFile;

#if HAVE_TERMIOS_H

/* init terminal so that we can grab keys */
static struct termios oldtty;
#endif

static void term_exit(void)
{
#if HAVE_TERMIOS_H
    tcsetattr (0, TCSANOW, &oldtty);
#endif
}

static volatile sig_atomic_t received_sigterm = 0;

static void
sigterm_handler(int sig)
{
    received_sigterm = sig;
    term_exit();
}

static void term_init(void)
{
#if HAVE_TERMIOS_H
    struct termios tty;

    tcgetattr (0, &tty);
    oldtty = tty;

    tty.c_iflag &= ~(IGNBRK|BRKINT|PARMRK|ISTRIP
                          |INLCR|IGNCR|ICRNL|IXON);
    tty.c_oflag |= OPOST;
    tty.c_lflag &= ~(ECHO|ECHONL|ICANON|IEXTEN);
    tty.c_cflag &= ~(CSIZE|PARENB);
    tty.c_cflag |= CS8;
    tty.c_cc[VMIN] = 1;
    tty.c_cc[VTIME] = 0;

    tcsetattr (0, TCSANOW, &tty);
    signal(SIGQUIT, sigterm_handler); /* Quit (POSIX).  */
#endif

    signal(SIGINT , sigterm_handler); /* Interrupt (ANSI).  */
    signal(SIGTERM, sigterm_handler); /* Termination (ANSI).  */
    /*
    register a function to be called at normal program termination
    */
    atexit(term_exit);
#if CONFIG_BEOS_NETSERVER
    fcntl(0, F_SETFL, fcntl(0, F_GETFL) | O_NONBLOCK);
#endif
}

/* read a key without blocking */
static int read_key(void)
{
#if HAVE_TERMIOS_H
    int n = 1;
    unsigned char ch;
#if !CONFIG_BEOS_NETSERVER
    struct timeval tv;
    fd_set rfds;

    FD_ZERO(&rfds);
    FD_SET(0, &rfds);
    tv.tv_sec = 0;
    tv.tv_usec = 0;
    n = select(1, &rfds, NULL, NULL, &tv);
#endif
    if (n > 0) {
        n = read(0, &ch, 1);
        if (n == 1)
            return ch;

        return n;
    }
#elif HAVE_CONIO_H
    if(kbhit())
        return(getch());
#endif
    return -1;
}

static int decode_interrupt_cb(void)
{
    return q_pressed || (q_pressed = read_key() == 'q');
}

static int av_exit(int ret)
{
    int i;

    /* close files */
    for(i=0;i<nb_output_files;i++) {
        /* maybe av_close_output_file ??? */
        AVFormatContext *s = output_files[i];
        int j;
        if (!(s->oformat->flags & AVFMT_NOFILE) && s->pb)
            url_fclose(s->pb);
        for(j=0;j<s->nb_streams;j++) {
            av_metadata_free(&s->streams[j]->metadata);
            av_free(s->streams[j]->codec);
            av_free(s->streams[j]);
        }
        for(j=0;j<s->nb_programs;j++) {
            av_metadata_free(&s->programs[j]->metadata);
        }
        for(j=0;j<s->nb_chapters;j++) {
            av_metadata_free(&s->chapters[j]->metadata);
        }
        av_metadata_free(&s->metadata);
        av_free(s);
    }
    for(i=0;i<nb_input_files;i++)
        av_close_input_file(input_files[i]);

    av_free(intra_matrix);
    av_free(inter_matrix);

    if (vstats_file)
        fclose(vstats_file);
    av_free(vstats_filename);

    av_free(opt_names);

    av_free(video_codec_name);
    av_free(audio_codec_name);
    av_free(subtitle_codec_name);

    av_free(video_standard);

#if CONFIG_POWERPC_PERF
    void powerpc_display_perf_report(void);
    powerpc_display_perf_report();
#endif /* CONFIG_POWERPC_PERF */

    if (received_sigterm) {
        fprintf(stderr,
            "Received signal %d: terminating.\n",
            (int) received_sigterm);
        exit (255);
    }

    exit(ret); /* not all OS-es handle main() return value */
    return ret;
}

static int read_ffserver_streams(AVFormatContext *s, const char *filename)
{
    int i, err;
    AVFormatContext *ic;
    int nopts = 0;

    err = av_open_input_file(&ic, filename, NULL, FFM_PACKET_SIZE, NULL);
    if (err < 0)
        return err;
    /* copy stream format */
    s->nb_streams = ic->nb_streams;
    for(i=0;i<ic->nb_streams;i++) {
        AVStream *st;

        // FIXME: a more elegant solution is needed
        st = av_mallocz(sizeof(AVStream));
        memcpy(st, ic->streams[i], sizeof(AVStream));
        st->codec = avcodec_alloc_context();
        memcpy(st->codec, ic->streams[i]->codec, sizeof(AVCodecContext));
        s->streams[i] = st;

        if (st->codec->codec_type == CODEC_TYPE_AUDIO && audio_stream_copy)
            st->stream_copy = 1;
        else if (st->codec->codec_type == CODEC_TYPE_VIDEO && video_stream_copy)
            st->stream_copy = 1;

        if(!st->codec->thread_count)
            st->codec->thread_count = 1;
        if(st->codec->thread_count>1)
            avcodec_thread_init(st->codec, st->codec->thread_count);

        if(st->codec->flags & CODEC_FLAG_BITEXACT)
            nopts = 1;
    }

    if (!nopts)
        s->timestamp = av_gettime();

    av_close_input_file(ic);
    return 0;
}

static double
get_sync_ipts(const AVOutputStream *ost)
{
    const AVInputStream *ist = ost->sync_ist;
    return (double)(ist->pts - start_time)/AV_TIME_BASE;
}

static void write_frame(AVFormatContext *s, AVPacket *pkt, AVCodecContext *avctx, AVBitStreamFilterContext *bsfc){
    int ret;

    while(bsfc){
        AVPacket new_pkt= *pkt;
        int a= av_bitstream_filter_filter(bsfc, avctx, NULL,
                                          &new_pkt.data, &new_pkt.size,
                                          pkt->data, pkt->size,
                                          pkt->flags & PKT_FLAG_KEY);
        if(a>0){
            av_free_packet(pkt);
            new_pkt.destruct= av_destruct_packet;
        } else if(a<0){
            fprintf(stderr, "%s failed for stream %d, codec %s",
                    bsfc->filter->name, pkt->stream_index,
                    avctx->codec ? avctx->codec->name : "copy");
            print_error("", a);
            if (exit_on_error)
                av_exit(1);
        }
        *pkt= new_pkt;

        bsfc= bsfc->next;
    }

    ret= av_interleaved_write_frame(s, pkt);
    if(ret < 0){
        print_error("av_interleaved_write_frame()", ret);
        av_exit(1);
    }
}

#define MAX_AUDIO_PACKET_SIZE (128 * 1024)

static void do_audio_out(AVFormatContext *s,
                         AVOutputStream *ost,
                         AVInputStream *ist,
                         unsigned char *buf, int size)
{
    uint8_t *buftmp;
    static uint8_t *audio_buf = NULL;
    static uint8_t *audio_out = NULL;
    static uint8_t *audio_out2 = NULL;
    const int audio_out_size= 4*MAX_AUDIO_PACKET_SIZE;

    int size_out, frame_bytes, ret;
    AVCodecContext *enc= ost->st->codec;
    AVCodecContext *dec= ist->st->codec;
    int osize= av_get_bits_per_sample_format(enc->sample_fmt)/8;
    int isize= av_get_bits_per_sample_format(dec->sample_fmt)/8;

    /* SC: dynamic allocation of buffers */
    if (!audio_buf)
        audio_buf = av_malloc(2*MAX_AUDIO_PACKET_SIZE);
    if (!audio_out)
        audio_out = av_malloc(audio_out_size);
    if (!audio_buf || !audio_out)
        return;               /* Should signal an error ! */

    if (enc->channels != dec->channels)
        ost->audio_resample = 1;

    if (ost->audio_resample && !ost->resample) {
        if (dec->sample_fmt != SAMPLE_FMT_S16)
            fprintf(stderr, "Warning, using s16 intermediate sample format for resampling\n");
        ost->resample = av_audio_resample_init(enc->channels,    dec->channels,
                                               enc->sample_rate, dec->sample_rate,
                                               enc->sample_fmt,  dec->sample_fmt,
                                               16, 10, 0, 0.8);
        if (!ost->resample) {
            fprintf(stderr, "Can not resample %d channels @ %d Hz to %d channels @ %d Hz\n",
                    dec->channels, dec->sample_rate,
                    enc->channels, enc->sample_rate);
            av_exit(1);
        }
    }

#define MAKE_SFMT_PAIR(a,b) ((a)+SAMPLE_FMT_NB*(b))
    if (!ost->audio_resample && dec->sample_fmt!=enc->sample_fmt &&
        MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt)!=ost->reformat_pair) {
        if (!audio_out2)
            audio_out2 = av_malloc(audio_out_size);
        if (!audio_out2)
            av_exit(1);
        if (ost->reformat_ctx)
            av_audio_convert_free(ost->reformat_ctx);
        ost->reformat_ctx = av_audio_convert_alloc(enc->sample_fmt, 1,
                                                   dec->sample_fmt, 1, NULL, 0);
        if (!ost->reformat_ctx) {
            fprintf(stderr, "Cannot convert %s sample format to %s sample format\n",
                avcodec_get_sample_fmt_name(dec->sample_fmt),
                avcodec_get_sample_fmt_name(enc->sample_fmt));
            av_exit(1);
        }
        ost->reformat_pair=MAKE_SFMT_PAIR(enc->sample_fmt,dec->sample_fmt);
    }

    if(audio_sync_method){
        double delta = get_sync_ipts(ost) * enc->sample_rate - ost->sync_opts
                - av_fifo_size(ost->fifo)/(ost->st->codec->channels * 2);
        double idelta= delta*ist->st->codec->sample_rate / enc->sample_rate;
        int byte_delta= ((int)idelta)*2*ist->st->codec->channels;

        //FIXME resample delay
        if(fabs(delta) > 50){
            if(ist->is_start || fabs(delta) > audio_drift_threshold*enc->sample_rate){
                if(byte_delta < 0){
                    byte_delta= FFMAX(byte_delta, -size);
                    size += byte_delta;
                    buf  -= byte_delta;
                    if(verbose > 2)
                        fprintf(stderr, "discarding %d audio samples\n", (int)-delta);
                    if(!size)
                        return;
                    ist->is_start=0;
                }else{
                    static uint8_t *input_tmp= NULL;
                    input_tmp= av_realloc(input_tmp, byte_delta + size);

                    if(byte_delta + size <= MAX_AUDIO_PACKET_SIZE)
                        ist->is_start=0;
                    else
                        byte_delta= MAX_AUDIO_PACKET_SIZE - size;

                    memset(input_tmp, 0, byte_delta);
                    memcpy(input_tmp + byte_delta, buf, size);
                    buf= input_tmp;
                    size += byte_delta;
                    if(verbose > 2)
                        fprintf(stderr, "adding %d audio samples of silence\n", (int)delta);
                }
            }else if(audio_sync_method>1){
                int comp= av_clip(delta, -audio_sync_method, audio_sync_method);
                assert(ost->audio_resample);
                if(verbose > 2)
                    fprintf(stderr, "compensating audio timestamp drift:%f compensation:%d in:%d\n", delta, comp, enc->sample_rate);
//                fprintf(stderr, "drift:%f len:%d opts:%"PRId64" ipts:%"PRId64" fifo:%d\n", delta, -1, ost->sync_opts, (int64_t)(get_sync_ipts(ost) * enc->sample_rate), av_fifo_size(ost->fifo)/(ost->st->codec->channels * 2));
                av_resample_compensate(*(struct AVResampleContext**)ost->resample, comp, enc->sample_rate);
            }
        }
    }else
        ost->sync_opts= lrintf(get_sync_ipts(ost) * enc->sample_rate)
                        - av_fifo_size(ost->fifo)/(ost->st->codec->channels * 2); //FIXME wrong

    if (ost->audio_resample) {
        buftmp = audio_buf;
        size_out = audio_resample(ost->resample,
                                  (short *)buftmp, (short *)buf,
                                  size / (ist->st->codec->channels * isize));
        size_out = size_out * enc->channels * osize;
    } else {
        buftmp = buf;
        size_out = size;
    }

    if (!ost->audio_resample && dec->sample_fmt!=enc->sample_fmt) {
        const void *ibuf[6]= {buftmp};
        void *obuf[6]= {audio_out2};
        int istride[6]= {isize};
        int ostride[6]= {osize};
        int len= size_out/istride[0];
        if (av_audio_convert(ost->reformat_ctx, obuf, ostride, ibuf, istride, len)<0) {
            printf("av_audio_convert() failed\n");
            if (exit_on_error)
                av_exit(1);
            return;
        }
        buftmp = audio_out2;
        size_out = len*osize;
    }

    /* now encode as many frames as possible */
    if (enc->frame_size > 1) {
        /* output resampled raw samples */
        if (av_fifo_realloc2(ost->fifo, av_fifo_size(ost->fifo) + size_out) < 0) {
            fprintf(stderr, "av_fifo_realloc2() failed\n");
            av_exit(1);
        }
        av_fifo_generic_write(ost->fifo, buftmp, size_out, NULL);

        frame_bytes = enc->frame_size * osize * enc->channels;

        while (av_fifo_size(ost->fifo) >= frame_bytes) {
            AVPacket pkt;
            av_init_packet(&pkt);

            av_fifo_generic_read(ost->fifo, audio_buf, frame_bytes, NULL);

            //FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()

            ret = avcodec_encode_audio(enc, audio_out, audio_out_size,
                                       (short *)audio_buf);
            if (ret < 0) {
                fprintf(stderr, "Audio encoding failed\n");
                av_exit(1);
            }
            audio_size += ret;
            pkt.stream_index= ost->index;
            pkt.data= audio_out;
            pkt.size= ret;
            if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
                pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
            pkt.flags |= PKT_FLAG_KEY;
            write_frame(s, &pkt, ost->st->codec, bitstream_filters[ost->file_index][pkt.stream_index]);

            ost->sync_opts += enc->frame_size;
        }
    } else {
        AVPacket pkt;
        int coded_bps = av_get_bits_per_sample(enc->codec->id)/8;
        av_init_packet(&pkt);

        ost->sync_opts += size_out / (osize * enc->channels);

        /* output a pcm frame */
        /* determine the size of the coded buffer */
        size_out /= osize;
        if (coded_bps)
            size_out *= coded_bps;

        //FIXME pass ost->sync_opts as AVFrame.pts in avcodec_encode_audio()
        ret = avcodec_encode_audio(enc, audio_out, size_out,
                                   (short *)buftmp);
        if (ret < 0) {
            fprintf(stderr, "Audio encoding failed\n");
            av_exit(1);
        }
        audio_size += ret;
        pkt.stream_index= ost->index;
        pkt.data= audio_out;
        pkt.size= ret;
        if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
            pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
        pkt.flags |= PKT_FLAG_KEY;
        write_frame(s, &pkt, ost->st->codec, bitstream_filters[ost->file_index][pkt.stream_index]);
    }
}

static void pre_process_video_frame(AVInputStream *ist, AVPicture *picture, void **bufp)
{
    AVCodecContext *dec;
    AVPicture *picture2;
    AVPicture picture_tmp;
    uint8_t *buf = 0;

    dec = ist->st->codec;

    /* deinterlace : must be done before any resize */
    if (do_deinterlace) {
        int size;

        /* create temporary picture */
        size = avpicture_get_size(dec->pix_fmt, dec->width, dec->height);
        buf = av_malloc(size);
        if (!buf)
            return;

        picture2 = &picture_tmp;
        avpicture_fill(picture2, buf, dec->pix_fmt, dec->width, dec->height);

        if (do_deinterlace){
            if(avpicture_deinterlace(picture2, picture,
                                     dec->pix_fmt, dec->width, dec->height) < 0) {
                /* if error, do not deinterlace */
                fprintf(stderr, "Deinterlacing failed\n");
                av_free(buf);
                buf = NULL;
                picture2 = picture;
            }
        } else {
            av_picture_copy(picture2, picture, dec->pix_fmt, dec->width, dec->height);
        }
    } else {
        picture2 = picture;
    }

    if (picture != picture2)
        *picture = *picture2;
    *bufp = buf;
}

/* we begin to correct av delay at this threshold */
#define AV_DELAY_MAX 0.100

static void do_subtitle_out(AVFormatContext *s,
                            AVOutputStream *ost,
                            AVInputStream *ist,
                            AVSubtitle *sub,
                            int64_t pts)
{
    static uint8_t *subtitle_out = NULL;
    int subtitle_out_max_size = 65536;
    int subtitle_out_size, nb, i;
    AVCodecContext *enc;
    AVPacket pkt;

    if (pts == AV_NOPTS_VALUE) {
        fprintf(stderr, "Subtitle packets must have a pts\n");
        if (exit_on_error)
            av_exit(1);
        return;
    }

    enc = ost->st->codec;

    if (!subtitle_out) {
        subtitle_out = av_malloc(subtitle_out_max_size);
    }

    /* Note: DVB subtitle need one packet to draw them and one other
       packet to clear them */
    /* XXX: signal it in the codec context ? */
    if (enc->codec_id == CODEC_ID_DVB_SUBTITLE)
        nb = 2;
    else
        nb = 1;

    for(i = 0; i < nb; i++) {
        subtitle_out_size = avcodec_encode_subtitle(enc, subtitle_out,
                                                    subtitle_out_max_size, sub);

        av_init_packet(&pkt);
        pkt.stream_index = ost->index;
        pkt.data = subtitle_out;
        pkt.size = subtitle_out_size;
        pkt.pts = av_rescale_q(pts, ist->st->time_base, ost->st->time_base);
        if (enc->codec_id == CODEC_ID_DVB_SUBTITLE) {
            /* XXX: the pts correction is handled here. Maybe handling
               it in the codec would be better */
            if (i == 0)
                pkt.pts += 90 * sub->start_display_time;
            else
                pkt.pts += 90 * sub->end_display_time;
        }
        write_frame(s, &pkt, ost->st->codec, bitstream_filters[ost->file_index][pkt.stream_index]);
    }
}

static int bit_buffer_size= 1024*256;
static uint8_t *bit_buffer= NULL;

static void do_video_out(AVFormatContext *s,
                         AVOutputStream *ost,
                         AVInputStream *ist,
                         AVFrame *in_picture,
                         int *frame_size)
{
    int nb_frames, i, ret;
    AVFrame *final_picture, *formatted_picture, *resampling_dst, *padding_src;
    AVFrame picture_crop_temp, picture_pad_temp;
    AVCodecContext *enc, *dec;

    avcodec_get_frame_defaults(&picture_crop_temp);
    avcodec_get_frame_defaults(&picture_pad_temp);

    enc = ost->st->codec;
    dec = ist->st->codec;

    /* by default, we output a single frame */
    nb_frames = 1;

    *frame_size = 0;

    if(video_sync_method>0 || (video_sync_method && av_q2d(enc->time_base) > 0.001)){
        double vdelta;
        vdelta = get_sync_ipts(ost) / av_q2d(enc->time_base) - ost->sync_opts;
        //FIXME set to 0.5 after we fix some dts/pts bugs like in avidec.c
        if (vdelta < -1.1)
            nb_frames = 0;
        else if (video_sync_method == 2 || (video_sync_method<0 && (s->oformat->flags & AVFMT_VARIABLE_FPS))){
            if(vdelta<=-0.6){
                nb_frames=0;
            }else if(vdelta>0.6)
            ost->sync_opts= lrintf(get_sync_ipts(ost) / av_q2d(enc->time_base));
        }else if (vdelta > 1.1)
            nb_frames = lrintf(vdelta);
//fprintf(stderr, "vdelta:%f, ost->sync_opts:%"PRId64", ost->sync_ipts:%f nb_frames:%d\n", vdelta, ost->sync_opts, get_sync_ipts(ost), nb_frames);
        if (nb_frames == 0){
            ++nb_frames_drop;
            if (verbose>2)
                fprintf(stderr, "*** drop!\n");
        }else if (nb_frames > 1) {
            nb_frames_dup += nb_frames;
            if (verbose>2)
                fprintf(stderr, "*** %d dup!\n", nb_frames-1);
        }
    }else
        ost->sync_opts= lrintf(get_sync_ipts(ost) / av_q2d(enc->time_base));

    nb_frames= FFMIN(nb_frames, max_frames[CODEC_TYPE_VIDEO] - ost->frame_number);
    if (nb_frames <= 0)
        return;

    if (ost->video_crop) {
        if (av_picture_crop((AVPicture *)&picture_crop_temp, (AVPicture *)in_picture, dec->pix_fmt, ost->topBand, ost->leftBand) < 0) {
            fprintf(stderr, "error cropping picture\n");
            if (exit_on_error)
                av_exit(1);
            return;
        }
        formatted_picture = &picture_crop_temp;
    } else {
        formatted_picture = in_picture;
    }

    final_picture = formatted_picture;
    padding_src = formatted_picture;
    resampling_dst = &ost->pict_tmp;
    if (ost->video_pad) {
        final_picture = &ost->pict_tmp;
        if (ost->video_resample) {
            if (av_picture_crop((AVPicture *)&picture_pad_temp, (AVPicture *)final_picture, enc->pix_fmt, ost->padtop, ost->padleft) < 0) {
                fprintf(stderr, "error padding picture\n");
                if (exit_on_error)
                    av_exit(1);
                return;
            }
            resampling_dst = &picture_pad_temp;
        }
    }

    if (ost->video_resample) {
        padding_src = NULL;
        final_picture = &ost->pict_tmp;
        sws_scale(ost->img_resample_ctx, formatted_picture->data, formatted_picture->linesize,
              0, ost->resample_height, resampling_dst->data, resampling_dst->linesize);
    }

    if (ost->video_pad) {
        av_picture_pad((AVPicture*)final_picture, (AVPicture *)padding_src,
                enc->height, enc->width, enc->pix_fmt,
                ost->padtop, ost->padbottom, ost->padleft, ost->padright, padcolor);
    }

    /* duplicates frame if needed */
    for(i=0;i<nb_frames;i++) {
        AVPacket pkt;
        av_init_packet(&pkt);
        pkt.stream_index= ost->index;

        if (s->oformat->flags & AVFMT_RAWPICTURE) {
            /* raw pictures are written as AVPicture structure to
               avoid any copies. We support temorarily the older
               method. */
            AVFrame* old_frame = enc->coded_frame;
            enc->coded_frame = dec->coded_frame; //FIXME/XXX remove this hack
            pkt.data= (uint8_t *)final_picture;
            pkt.size=  sizeof(AVPicture);
            pkt.pts= av_rescale_q(ost->sync_opts, enc->time_base, ost->st->time_base);
            pkt.flags |= PKT_FLAG_KEY;

            write_frame(s, &pkt, ost->st->codec, bitstream_filters[ost->file_index][pkt.stream_index]);
            enc->coded_frame = old_frame;
        } else {
            AVFrame big_picture;

            big_picture= *final_picture;
            /* better than nothing: use input picture interlaced
               settings */
            big_picture.interlaced_frame = in_picture->interlaced_frame;
            if(avcodec_opts[CODEC_TYPE_VIDEO]->flags & (CODEC_FLAG_INTERLACED_DCT|CODEC_FLAG_INTERLACED_ME)){
                if(top_field_first == -1)
                    big_picture.top_field_first = in_picture->top_field_first;
                else
                    big_picture.top_field_first = top_field_first;
            }

            /* handles sameq here. This is not correct because it may
               not be a global option */
            if (same_quality) {
                big_picture.quality = ist->st->quality;
            }else
                big_picture.quality = ost->st->quality;
            if(!me_threshold)
                big_picture.pict_type = 0;
//            big_picture.pts = AV_NOPTS_VALUE;
            big_picture.pts= ost->sync_opts;
//            big_picture.pts= av_rescale(ost->sync_opts, AV_TIME_BASE*(int64_t)enc->time_base.num, enc->time_base.den);
//av_log(NULL, AV_LOG_DEBUG, "%"PRId64" -> encoder\n", ost->sync_opts);
            ret = avcodec_encode_video(enc,
                                       bit_buffer, bit_buffer_size,
                                       &big_picture);
            if (ret < 0) {
                fprintf(stderr, "Video encoding failed\n");
                av_exit(1);
            }
            //enc->frame_number = enc->real_pict_num;
            if(ret>0){
                pkt.data= bit_buffer;
                pkt.size= ret;
                if(enc->coded_frame->pts != AV_NOPTS_VALUE)
                    pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
/*av_log(NULL, AV_LOG_DEBUG, "encoder -> %"PRId64"/%"PRId64"\n",
   pkt.pts != AV_NOPTS_VALUE ? av_rescale(pkt.pts, enc->time_base.den, AV_TIME_BASE*(int64_t)enc->time_base.num) : -1,
   pkt.dts != AV_NOPTS_VALUE ? av_rescale(pkt.dts, enc->time_base.den, AV_TIME_BASE*(int64_t)enc->time_base.num) : -1);*/

                if(enc->coded_frame->key_frame)
                    pkt.flags |= PKT_FLAG_KEY;
                write_frame(s, &pkt, ost->st->codec, bitstream_filters[ost->file_index][pkt.stream_index]);
                *frame_size = ret;
                video_size += ret;
                //fprintf(stderr,"\nFrame: %3d %3d size: %5d type: %d",
                //        enc->frame_number-1, enc->real_pict_num, ret,
                //        enc->pict_type);
                /* if two pass, output log */
                if (ost->logfile && enc->stats_out) {
                    fprintf(ost->logfile, "%s", enc->stats_out);
                }
            }
        }
        ost->sync_opts++;
        ost->frame_number++;
    }
}

static double psnr(double d){
    return -10.0*log(d)/log(10.0);
}

static void do_video_stats(AVFormatContext *os, AVOutputStream *ost,
                           int frame_size)
{
    AVCodecContext *enc;
    int frame_number;
    double ti1, bitrate, avg_bitrate;

    /* this is executed just the first time do_video_stats is called */
    if (!vstats_file) {
        vstats_file = fopen(vstats_filename, "w");
        if (!vstats_file) {
            perror("fopen");
            av_exit(1);
        }
    }

    enc = ost->st->codec;
    if (enc->codec_type == CODEC_TYPE_VIDEO) {
        frame_number = ost->frame_number;
        fprintf(vstats_file, "frame= %5d q= %2.1f ", frame_number, enc->coded_frame->quality/(float)FF_QP2LAMBDA);
        if (enc->flags&CODEC_FLAG_PSNR)
            fprintf(vstats_file, "PSNR= %6.2f ", psnr(enc->coded_frame->error[0]/(enc->width*enc->height*255.0*255.0)));

        fprintf(vstats_file,"f_size= %6d ", frame_size);
        /* compute pts value */
        ti1 = ost->sync_opts * av_q2d(enc->time_base);
        if (ti1 < 0.01)
            ti1 = 0.01;

        bitrate = (frame_size * 8) / av_q2d(enc->time_base) / 1000.0;
        avg_bitrate = (double)(video_size * 8) / ti1 / 1000.0;
        fprintf(vstats_file, "s_size= %8.0fkB time= %0.3f br= %7.1fkbits/s avg_br= %7.1fkbits/s ",
            (double)video_size / 1024, ti1, bitrate, avg_bitrate);
        fprintf(vstats_file,"type= %c\n", av_get_pict_type_char(enc->coded_frame->pict_type));
    }
}

static void print_report(AVFormatContext **output_files,
                         AVOutputStream **ost_table, int nb_ostreams,
                         int is_last_report)
{
    char buf[1024];
    AVOutputStream *ost;
    AVFormatContext *oc, *os;
    int64_t total_size;
    AVCodecContext *enc;
    int frame_number, vid, i;
    double bitrate, ti1, pts;
    static int64_t last_time = -1;
    static int qp_histogram[52];

    if (!is_last_report) {
        int64_t cur_time;
        /* display the report every 0.5 seconds */
        cur_time = av_gettime();
        if (last_time == -1) {
            last_time = cur_time;
            return;
        }
        if ((cur_time - last_time) < 500000)
            return;
        last_time = cur_time;
    }


    oc = output_files[0];

    total_size = url_fsize(oc->pb);
    if(total_size<0) // FIXME improve url_fsize() so it works with non seekable output too
        total_size= url_ftell(oc->pb);

    buf[0] = '\0';
    ti1 = 1e10;
    vid = 0;
    for(i=0;i<nb_ostreams;i++) {
        ost = ost_table[i];
        os = output_files[ost->file_index];
        enc = ost->st->codec;
        if (vid && enc->codec_type == CODEC_TYPE_VIDEO) {
            snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "q=%2.1f ",
                     !ost->st->stream_copy ?
                     enc->coded_frame->quality/(float)FF_QP2LAMBDA : -1);
        }
        if (!vid && enc->codec_type == CODEC_TYPE_VIDEO) {
            float t = (av_gettime()-timer_start) / 1000000.0;

            frame_number = ost->frame_number;
            snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "frame=%5d fps=%3d q=%3.1f ",
                     frame_number, (t>1)?(int)(frame_number/t+0.5) : 0,
                     !ost->st->stream_copy ?
                     enc->coded_frame->quality/(float)FF_QP2LAMBDA : -1);
            if(is_last_report)
                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "L");
            if(qp_hist){
                int j;
                int qp= lrintf(enc->coded_frame->quality/(float)FF_QP2LAMBDA);
                if(qp>=0 && qp<FF_ARRAY_ELEMS(qp_histogram))
                    qp_histogram[qp]++;
                for(j=0; j<32; j++)
                    snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%X", (int)lrintf(log(qp_histogram[j]+1)/log(2)));
            }
            if (enc->flags&CODEC_FLAG_PSNR){
                int j;
                double error, error_sum=0;
                double scale, scale_sum=0;
                char type[3]= {'Y','U','V'};
                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "PSNR=");
                for(j=0; j<3; j++){
                    if(is_last_report){
                        error= enc->error[j];
                        scale= enc->width*enc->height*255.0*255.0*frame_number;
                    }else{
                        error= enc->coded_frame->error[j];
                        scale= enc->width*enc->height*255.0*255.0;
                    }
                    if(j) scale/=4;
                    error_sum += error;
                    scale_sum += scale;
                    snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "%c:%2.2f ", type[j], psnr(error/scale));
                }
                snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), "*:%2.2f ", psnr(error_sum/scale_sum));
            }
            vid = 1;
        }
        /* compute min output value */
        pts = (double)ost->st->pts.val * av_q2d(ost->st->time_base);
        if ((pts < ti1) && (pts > 0))
            ti1 = pts;
    }
    if (ti1 < 0.01)
        ti1 = 0.01;

    if (verbose || is_last_report) {
        bitrate = (double)(total_size * 8) / ti1 / 1000.0;

        snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf),
            "size=%8.0fkB time=%0.2f bitrate=%6.1fkbits/s",
            (double)total_size / 1024, ti1, bitrate);

        if (verbose > 1)
          snprintf(buf + strlen(buf), sizeof(buf) - strlen(buf), " dup=%d drop=%d",
                  nb_frames_dup, nb_frames_drop);

        if (verbose >= 0)
            fprintf(stderr, "%s    \r", buf);

        fflush(stderr);
    }

    if (is_last_report && verbose >= 0){
        int64_t raw= audio_size + video_size + extra_size;
        fprintf(stderr, "\n");
        fprintf(stderr, "video:%1.0fkB audio:%1.0fkB global headers:%1.0fkB muxing overhead %f%%\n",
                video_size/1024.0,
                audio_size/1024.0,
                extra_size/1024.0,
                100.0*(total_size - raw)/raw
        );
    }
}

/* pkt = NULL means EOF (needed to flush decoder buffers) */
static int output_packet(AVInputStream *ist, int ist_index,
                         AVOutputStream **ost_table, int nb_ostreams,
                         const AVPacket *pkt)
{
    AVFormatContext *os;
    AVOutputStream *ost;
    uint8_t *ptr;
    int len, ret, i;
    uint8_t *data_buf;
    int data_size, got_picture;
    AVFrame picture;
    void *buffer_to_free;
    static unsigned int samples_size= 0;
    static short *samples= NULL;
    AVSubtitle subtitle, *subtitle_to_free;
    int got_subtitle;

    if(ist->next_pts == AV_NOPTS_VALUE)
        ist->next_pts= ist->pts;

    if (pkt == NULL) {
        /* EOF handling */
        ptr = NULL;
        len = 0;
        goto handle_eof;
    }

    if(pkt->dts != AV_NOPTS_VALUE)
        ist->next_pts = ist->pts = av_rescale_q(pkt->dts, ist->st->time_base, AV_TIME_BASE_Q);

    len = pkt->size;
    ptr = pkt->data;

    //while we have more to decode or while the decoder did output something on EOF
    while (len > 0 || (!pkt && ist->next_pts != ist->pts)) {
    handle_eof:
        ist->pts= ist->next_pts;

        if(len && len != pkt->size && verbose>0)
            fprintf(stderr, "Multiple frames in a packet from stream %d\n", pkt->stream_index);

        /* decode the packet if needed */
        data_buf = NULL; /* fail safe */
        data_size = 0;
        subtitle_to_free = NULL;
        if (ist->decoding_needed) {
            switch(ist->st->codec->codec_type) {
            case CODEC_TYPE_AUDIO:{
                if(pkt && samples_size < FFMAX(pkt->size*sizeof(*samples), AVCODEC_MAX_AUDIO_FRAME_SIZE)) {
                    samples_size = FFMAX(pkt->size*sizeof(*samples), AVCODEC_MAX_AUDIO_FRAME_SIZE);
                    av_free(samples);
                    samples= av_malloc(samples_size);
                }
                data_size= samples_size;
                    /* XXX: could avoid copy if PCM 16 bits with same
                       endianness as CPU */
                ret = avcodec_decode_audio2(ist->st->codec, samples, &data_size,
                                           ptr, len);
                if (ret < 0)
                    goto fail_decode;
                ptr += ret;
                len -= ret;
                /* Some bug in mpeg audio decoder gives */
                /* data_size < 0, it seems they are overflows */
                if (data_size <= 0) {
                    /* no audio frame */
                    continue;
                }
                data_buf = (uint8_t *)samples;
                ist->next_pts += ((int64_t)AV_TIME_BASE/2 * data_size) /
                    (ist->st->codec->sample_rate * ist->st->codec->channels);
                break;}
            case CODEC_TYPE_VIDEO:
                    data_size = (ist->st->codec->width * ist->st->codec->height * 3) / 2;
                    /* XXX: allocate picture correctly */
                    avcodec_get_frame_defaults(&picture);

                    ret = avcodec_decode_video(ist->st->codec,
                                               &picture, &got_picture, ptr, len);
                    ist->st->quality= picture.quality;
                    if (ret < 0)
                        goto fail_decode;
                    if (!got_picture) {
                        /* no picture yet */
                        goto discard_packet;
                    }
                    if (ist->st->codec->time_base.num != 0) {
                        int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
                        ist->next_pts += ((int64_t)AV_TIME_BASE *
                                          ist->st->codec->time_base.num * ticks) /
                            ist->st->codec->time_base.den;
                    }
                    len = 0;
                    break;
            case CODEC_TYPE_SUBTITLE:
                ret = avcodec_decode_subtitle(ist->st->codec,
                                              &subtitle, &got_subtitle, ptr, len);
                if (ret < 0)
                    goto fail_decode;
                if (!got_subtitle) {
                    goto discard_packet;
                }
                subtitle_to_free = &subtitle;
                len = 0;
                break;
            default:
                goto fail_decode;
            }
        } else {
            switch(ist->st->codec->codec_type) {
            case CODEC_TYPE_AUDIO:
                ist->next_pts += ((int64_t)AV_TIME_BASE * ist->st->codec->frame_size) /
                    ist->st->codec->sample_rate;
                break;
            case CODEC_TYPE_VIDEO:
                if (ist->st->codec->time_base.num != 0) {
                    int ticks= ist->st->parser ? ist->st->parser->repeat_pict+1 : ist->st->codec->ticks_per_frame;
                    ist->next_pts += ((int64_t)AV_TIME_BASE *
                                      ist->st->codec->time_base.num * ticks) /
                        ist->st->codec->time_base.den;
                }
                break;
            }
            data_buf = ptr;
            data_size = len;
            ret = len;
            len = 0;
        }

        buffer_to_free = NULL;
        if (ist->st->codec->codec_type == CODEC_TYPE_VIDEO) {
            pre_process_video_frame(ist, (AVPicture *)&picture,
                                    &buffer_to_free);
        }

        // preprocess audio (volume)
        if (ist->st->codec->codec_type == CODEC_TYPE_AUDIO) {
            if (audio_volume != 256) {
                short *volp;
                volp = samples;
                for(i=0;i<(data_size / sizeof(short));i++) {
                    int v = ((*volp) * audio_volume + 128) >> 8;
                    if (v < -32768) v = -32768;
                    if (v >  32767) v = 32767;
                    *volp++ = v;
                }
            }
        }

        /* frame rate emulation */
        if (rate_emu) {
            int64_t pts = av_rescale(ist->pts, 1000000, AV_TIME_BASE);
            int64_t now = av_gettime() - ist->start;
            if (pts > now)
                usleep(pts - now);
        }

        /* if output time reached then transcode raw format,
           encode packets and output them */
        if (start_time == 0 || ist->pts >= start_time)
            for(i=0;i<nb_ostreams;i++) {
                int frame_size;

                ost = ost_table[i];
                if (ost->source_index == ist_index) {
                    os = output_files[ost->file_index];

#if 0
                    printf("%d: got pts=%0.3f %0.3f\n", i,
                           (double)pkt->pts / AV_TIME_BASE,
                           ((double)ist->pts / AV_TIME_BASE) -
                           ((double)ost->st->pts.val * ost->st->time_base.num / ost->st->time_base.den));
#endif
                    /* set the input output pts pairs */
                    //ost->sync_ipts = (double)(ist->pts + input_files_ts_offset[ist->file_index] - start_time)/ AV_TIME_BASE;

                    if (ost->encoding_needed) {
                        switch(ost->st->codec->codec_type) {
                        case CODEC_TYPE_AUDIO:
                            do_audio_out(os, ost, ist, data_buf, data_size);
                            break;
                        case CODEC_TYPE_VIDEO:
                            do_video_out(os, ost, ist, &picture, &frame_size);
                            if (vstats_filename && frame_size)
                                do_video_stats(os, ost, frame_size);
                            break;
                        case CODEC_TYPE_SUBTITLE:
                            do_subtitle_out(os, ost, ist, &subtitle,
                                            pkt->pts);
                            break;
                        default:
                            abort();
                        }
                    } else {
                        AVFrame avframe; //FIXME/XXX remove this
                        AVPacket opkt;
                        av_init_packet(&opkt);

                        if ((!ost->frame_number && !(pkt->flags & PKT_FLAG_KEY)) && !copy_initial_nonkeyframes)
                            continue;

                        /* no reencoding needed : output the packet directly */
                        /* force the input stream PTS */

                        avcodec_get_frame_defaults(&avframe);
                        ost->st->codec->coded_frame= &avframe;
                        avframe.key_frame = pkt->flags & PKT_FLAG_KEY;

                        if(ost->st->codec->codec_type == CODEC_TYPE_AUDIO)
                            audio_size += data_size;
                        else if (ost->st->codec->codec_type == CODEC_TYPE_VIDEO) {
                            video_size += data_size;
                            ost->sync_opts++;
                        }

                        opkt.stream_index= ost->index;
                        if(pkt->pts != AV_NOPTS_VALUE)
                            opkt.pts= av_rescale_q(pkt->pts, ist->st->time_base, ost->st->time_base);
                        else
                            opkt.pts= AV_NOPTS_VALUE;

                        if (pkt->dts == AV_NOPTS_VALUE)
                            opkt.dts = av_rescale_q(ist->pts, AV_TIME_BASE_Q, ost->st->time_base);
                        else
                            opkt.dts = av_rescale_q(pkt->dts, ist->st->time_base, ost->st->time_base);

                        opkt.duration = av_rescale_q(pkt->duration, ist->st->time_base, ost->st->time_base);
                        opkt.flags= pkt->flags;

                        //FIXME remove the following 2 lines they shall be replaced by the bitstream filters
                        if(av_parser_change(ist->st->parser, ost->st->codec, &opkt.data, &opkt.size, data_buf, data_size, pkt->flags & PKT_FLAG_KEY))
                            opkt.destruct= av_destruct_packet;

                        write_frame(os, &opkt, ost->st->codec, bitstream_filters[ost->file_index][opkt.stream_index]);
                        ost->st->codec->frame_number++;
                        ost->frame_number++;
                        av_free_packet(&opkt);
                    }
                }
            }
        av_free(buffer_to_free);
        /* XXX: allocate the subtitles in the codec ? */
        if (subtitle_to_free) {
            if (subtitle_to_free->rects != NULL) {
                for (i = 0; i < subtitle_to_free->num_rects; i++) {
                    av_freep(&subtitle_to_free->rects[i]->pict.data[0]);
                    av_freep(&subtitle_to_free->rects[i]->pict.data[1]);
                    av_freep(&subtitle_to_free->rects[i]);
                }
                av_freep(&subtitle_to_free->rects);
            }
            subtitle_to_free->num_rects = 0;
            subtitle_to_free = NULL;
        }
    }
 discard_packet:
    if (pkt == NULL) {
        /* EOF handling */

        for(i=0;i<nb_ostreams;i++) {
            ost = ost_table[i];
            if (ost->source_index == ist_index) {
                AVCodecContext *enc= ost->st->codec;
                os = output_files[ost->file_index];

                if(ost->st->codec->codec_type == CODEC_TYPE_AUDIO && enc->frame_size <=1)
                    continue;
                if(ost->st->codec->codec_type == CODEC_TYPE_VIDEO && (os->oformat->flags & AVFMT_RAWPICTURE))
                    continue;

                if (ost->encoding_needed) {
                    for(;;) {
                        AVPacket pkt;
                        int fifo_bytes;
                        av_init_packet(&pkt);
                        pkt.stream_index= ost->index;

                        switch(ost->st->codec->codec_type) {
                        case CODEC_TYPE_AUDIO:
                            fifo_bytes = av_fifo_size(ost->fifo);
                            ret = 0;
                            /* encode any samples remaining in fifo */
                            if(fifo_bytes > 0 && enc->codec->capabilities & CODEC_CAP_SMALL_LAST_FRAME) {
                                int fs_tmp = enc->frame_size;
                                enc->frame_size = fifo_bytes / (2 * enc->channels);
                                av_fifo_generic_read(ost->fifo, samples, fifo_bytes, NULL);
                                    ret = avcodec_encode_audio(enc, bit_buffer, bit_buffer_size, samples);
                                enc->frame_size = fs_tmp;
                            }
                            if(ret <= 0) {
                                ret = avcodec_encode_audio(enc, bit_buffer, bit_buffer_size, NULL);
                            }
                            if (ret < 0) {
                                fprintf(stderr, "Audio encoding failed\n");
                                av_exit(1);
                            }
                            audio_size += ret;
                            pkt.flags |= PKT_FLAG_KEY;
                            break;
                        case CODEC_TYPE_VIDEO:
                            ret = avcodec_encode_video(enc, bit_buffer, bit_buffer_size, NULL);
                            if (ret < 0) {
                                fprintf(stderr, "Video encoding failed\n");
                                av_exit(1);
                            }
                            video_size += ret;
                            if(enc->coded_frame && enc->coded_frame->key_frame)
                                pkt.flags |= PKT_FLAG_KEY;
                            if (ost->logfile && enc->stats_out) {
                                fprintf(ost->logfile, "%s", enc->stats_out);
                            }
                            break;
                        default:
                            ret=-1;
                        }

                        if(ret<=0)
                            break;
                        pkt.data= bit_buffer;
                        pkt.size= ret;
                        if(enc->coded_frame && enc->coded_frame->pts != AV_NOPTS_VALUE)
                            pkt.pts= av_rescale_q(enc->coded_frame->pts, enc->time_base, ost->st->time_base);
                        write_frame(os, &pkt, ost->st->codec, bitstream_filters[ost->file_index][pkt.stream_index]);
                    }
                }
            }
        }
    }

    return 0;
 fail_decode:
    return -1;
}

static void print_sdp(AVFormatContext **avc, int n)
{
    char sdp[2048];

    avf_sdp_create(avc, n, sdp, sizeof(sdp));
    printf("SDP:\n%s\n", sdp);
    fflush(stdout);
}

static int stream_index_from_inputs(AVFormatContext **input_files,
                                    int nb_input_files,
                                    AVInputFile *file_table,
                                    AVInputStream **ist_table,
                                    enum CodecType type,
                                    int programid)
{
    int p, q, z;
    for(z=0; z<nb_input_files; z++) {
        AVFormatContext *ic = input_files[z];
        for(p=0; p<ic->nb_programs; p++) {
            AVProgram *program = ic->programs[p];
            if(program->id != programid)
                continue;
            for(q=0; q<program->nb_stream_indexes; q++) {
                int sidx = program->stream_index[q];
                int ris = file_table[z].ist_index + sidx;
                if(ist_table[ris]->discard && ic->streams[sidx]->codec->codec_type == type)
                    return ris;
            }
        }
    }

    return -1;
}

/*
 * The following code is the main loop of the file converter
 */
static int av_encode(AVFormatContext **output_files,
                     int nb_output_files,
                     AVFormatContext **input_files,
                     int nb_input_files,
                     AVStreamMap *stream_maps, int nb_stream_maps)
{
    int ret, i, j, k, n, nb_istreams = 0, nb_ostreams = 0;
    AVFormatContext *is, *os;
    AVCodecContext *codec, *icodec;
    AVOutputStream *ost, **ost_table = NULL;
    AVInputStream *ist, **ist_table = NULL;
    AVInputFile *file_table;
    int key;
    int want_sdp = 1;
    uint8_t no_packet[MAX_FILES]={0};
    int no_packet_count=0;

    file_table= av_mallocz(nb_input_files * sizeof(AVInputFile));
    if (!file_table)
        goto fail;

    /* input stream init */
    j = 0;
    for(i=0;i<nb_input_files;i++) {
        is = input_files[i];
        file_table[i].ist_index = j;
        file_table[i].nb_streams = is->nb_streams;
        j += is->nb_streams;
    }
    nb_istreams = j;

    ist_table = av_mallocz(nb_istreams * sizeof(AVInputStream *));
    if (!ist_table)
        goto fail;

    for(i=0;i<nb_istreams;i++) {
        ist = av_mallocz(sizeof(AVInputStream));
        if (!ist)
            goto fail;
        ist_table[i] = ist;
    }
    j = 0;
    for(i=0;i<nb_input_files;i++) {
        is = input_files[i];
        for(k=0;k<is->nb_streams;k++) {
            ist = ist_table[j++];
            ist->st = is->streams[k];
            ist->file_index = i;
            ist->index = k;
            ist->discard = 1; /* the stream is discarded by default
                                 (changed later) */

            if (rate_emu) {
                ist->start = av_gettime();
            }
        }
    }

    /* output stream init */
    nb_ostreams = 0;
    for(i=0;i<nb_output_files;i++) {
        os = output_files[i];
        if (!os->nb_streams) {
            dump_format(output_files[i], i, output_files[i]->filename, 1);
            fprintf(stderr, "Output file #%d does not contain any stream\n", i);
            av_exit(1);
        }
        nb_ostreams += os->nb_streams;
    }
    if (nb_stream_maps > 0 && nb_stream_maps != nb_ostreams) {
        fprintf(stderr, "Number of stream maps must match number of output streams\n");
        av_exit(1);
    }

    /* Sanity check the mapping args -- do the input files & streams exist? */
    for(i=0;i<nb_stream_maps;i++) {
        int fi = stream_maps[i].file_index;
        int si = stream_maps[i].stream_index;

        if (fi < 0 || fi > nb_input_files - 1 ||
            si < 0 || si > file_table[fi].nb_streams - 1) {
            fprintf(stderr,"Could not find input stream #%d.%d\n", fi, si);
            av_exit(1);
        }
        fi = stream_maps[i].sync_file_index;
        si = stream_maps[i].sync_stream_index;
        if (fi < 0 || fi > nb_input_files - 1 ||
            si < 0 || si > file_table[fi].nb_streams - 1) {
            fprintf(stderr,"Could not find sync stream #%d.%d\n", fi, si);
            av_exit(1);
        }
    }

    ost_table = av_mallocz(sizeof(AVOutputStream *) * nb_ostreams);
    if (!ost_table)
        goto fail;
    for(i=0;i<nb_ostreams;i++) {
        ost = av_mallocz(sizeof(AVOutputStream));
        if (!ost)
            goto fail;
        ost_table[i] = ost;
    }

    n = 0;
    for(k=0;k<nb_output_files;k++) {
        os = output_files[k];
        for(i=0;i<os->nb_streams;i++,n++) {
            int found;
            ost = ost_table[n];
            ost->file_index = k;
            ost->index = i;
            ost->st = os->streams[i];
            if (nb_stream_maps > 0) {
                ost->source_index = file_table[stream_maps[n].file_index].ist_index +
                    stream_maps[n].stream_index;

                /* Sanity check that the stream types match */
                if (ist_table[ost->source_index]->st->codec->codec_type != ost->st->codec->codec_type) {
                    int i= ost->file_index;
                    dump_format(output_files[i], i, output_files[i]->filename, 1);
                    fprintf(stderr, "Codec type mismatch for mapping #%d.%d -> #%d.%d\n",
                        stream_maps[n].file_index, stream_maps[n].stream_index,
                        ost->file_index, ost->index);
                    av_exit(1);
                }

            } else {
                if(opt_programid) {
                    found = 0;
                    j = stream_index_from_inputs(input_files, nb_input_files, file_table, ist_table, ost->st->codec->codec_type, opt_programid);
                    if(j != -1) {
                        ost->source_index = j;
                        found = 1;
                    }
                } else {
                    /* get corresponding input stream index : we select the first one with the right type */
                    found = 0;
                    for(j=0;j<nb_istreams;j++) {
                        ist = ist_table[j];
                        if (ist->discard &&
                            ist->st->codec->codec_type == ost->st->codec->codec_type) {
                            ost->source_index = j;
                            found = 1;
                            break;
                        }
                    }
                }

                if (!found) {
                    if(! opt_programid) {
                        /* try again and reuse existing stream */
                        for(j=0;j<nb_istreams;j++) {
                            ist = ist_table[j];
                            if (ist->st->codec->codec_type == ost->st->codec->codec_type) {
                                ost->source_index = j;
                                found = 1;
                            }
                        }
                    }
                    if (!found) {
                        int i= ost->file_index;
                        dump_format(output_files[i], i, output_files[i]->filename, 1);
                        fprintf(stderr, "Could not find input stream matching output stream #%d.%d\n",
                                ost->file_index, ost->index);
                        av_exit(1);
                    }
                }
            }
            ist = ist_table[ost->source_index];
            ist->discard = 0;
            ost->sync_ist = (nb_stream_maps > 0) ?
                ist_table[file_table[stream_maps[n].sync_file_index].ist_index +
                         stream_maps[n].sync_stream_index] : ist;
        }
    }

    /* for each output stream, we compute the right encoding parameters */
    for(i=0;i<nb_ostreams;i++) {
        AVMetadataTag *lang;
        ost = ost_table[i];
        os = output_files[ost->file_index];
        ist = ist_table[ost->source_index];

        codec = ost->st->codec;
        icodec = ist->st->codec;

        if ((lang=av_metadata_get(ist->st->metadata, "language", NULL, 0))
            &&   !av_metadata_get(ost->st->metadata, "language", NULL, 0))
            av_metadata_set(&ost->st->metadata, "language", lang->value);

        ost->st->disposition = ist->st->disposition;

        if (ost->st->stream_copy) {
            /* if stream_copy is selected, no need to decode or encode */
            codec->codec_id = icodec->codec_id;
            codec->codec_type = icodec->codec_type;

            if(!codec->codec_tag){
                if(   !os->oformat->codec_tag
                   || av_codec_get_id (os->oformat->codec_tag, icodec->codec_tag) > 0
                   || av_codec_get_tag(os->oformat->codec_tag, icodec->codec_id) <= 0)
                    codec->codec_tag = icodec->codec_tag;
            }

            codec->bit_rate = icodec->bit_rate;
            codec->extradata= icodec->extradata;
            codec->extradata_size= icodec->extradata_size;
            if(av_q2d(icodec->time_base)*icodec->ticks_per_frame > av_q2d(ist->st->time_base) && av_q2d(ist->st->time_base) < 1.0/1000){
                codec->time_base = icodec->time_base;
                codec->time_base.num *= icodec->ticks_per_frame;
            }else
                codec->time_base = ist->st->time_base;
            switch(codec->codec_type) {
            case CODEC_TYPE_AUDIO:
                if(audio_volume != 256) {
                    fprintf(stderr,"-acodec copy and -vol are incompatible (frames are not decoded)\n");
                    av_exit(1);
                }
                codec->channel_layout = icodec->channel_layout;
                codec->sample_rate = icodec->sample_rate;
                codec->channels = icodec->channels;
                codec->frame_size = icodec->frame_size;
                codec->block_align= icodec->block_align;
                if(codec->block_align == 1 && codec->codec_id == CODEC_ID_MP3)
                    codec->block_align= 0;
                if(codec->codec_id == CODEC_ID_AC3)
                    codec->block_align= 0;
                break;
            case CODEC_TYPE_VIDEO:
                codec->pix_fmt = icodec->pix_fmt;
                codec->width = icodec->width;
                codec->height = icodec->height;
                codec->has_b_frames = icodec->has_b_frames;
                break;
            case CODEC_TYPE_SUBTITLE:
                codec->width = icodec->width;
                codec->height = icodec->height;
                break;
            default:
                abort();
            }
        } else {
            switch(codec->codec_type) {
            case CODEC_TYPE_AUDIO:
                ost->fifo= av_fifo_alloc(1024);
                if(!ost->fifo)
                    goto fail;
                ost->reformat_pair = MAKE_SFMT_PAIR(SAMPLE_FMT_NONE,SAMPLE_FMT_NONE);
                ost->audio_resample = codec->sample_rate != icodec->sample_rate || audio_sync_method > 1;
                icodec->request_channels = codec->channels;
                ist->decoding_needed = 1;
                ost->encoding_needed = 1;
                break;
            case CODEC_TYPE_VIDEO:
                ost->video_crop = ((frame_leftBand + frame_rightBand + frame_topBand + frame_bottomBand) != 0);
                ost->video_pad = ((frame_padleft + frame_padright + frame_padtop + frame_padbottom) != 0);
                ost->video_resample = ((codec->width != icodec->width -
                                (frame_leftBand + frame_rightBand) +
                                (frame_padleft + frame_padright)) ||
                        (codec->height != icodec->height -
                                (frame_topBand  + frame_bottomBand) +
                                (frame_padtop + frame_padbottom)) ||
                        (codec->pix_fmt != icodec->pix_fmt));
                if (ost->video_crop) {
                    ost->topBand = frame_topBand;
                    ost->leftBand = frame_leftBand;
                }
                if (ost->video_pad) {
                    ost->padtop = frame_padtop;
                    ost->padleft = frame_padleft;
                    ost->padbottom = frame_padbottom;
                    ost->padright = frame_padright;
                    if (!ost->video_resample) {
                        avcodec_get_frame_defaults(&ost->pict_tmp);
                        if(avpicture_alloc((AVPicture*)&ost->pict_tmp, codec->pix_fmt,
                                         codec->width, codec->height))
                            goto fail;
                    }
                }
                if (ost->video_resample) {
                    avcodec_get_frame_defaults(&ost->pict_tmp);
                    if(avpicture_alloc((AVPicture*)&ost->pict_tmp, codec->pix_fmt,
                                         codec->width, codec->height)) {
                        fprintf(stderr, "Cannot allocate temp picture, check pix fmt\n");
                        av_exit(1);
                    }
                    sws_flags = av_get_int(sws_opts, "sws_flags", NULL);
                    ost->img_resample_ctx = sws_getContext(
                            icodec->width - (frame_leftBand + frame_rightBand),
                            icodec->height - (frame_topBand + frame_bottomBand),
                            icodec->pix_fmt,
                            codec->width - (frame_padleft + frame_padright),
                            codec->height - (frame_padtop + frame_padbottom),
                            codec->pix_fmt,
                            sws_flags, NULL, NULL, NULL);
                    if (ost->img_resample_ctx == NULL) {
                        fprintf(stderr, "Cannot get resampling context\n");
                        av_exit(1);
                    }
                    ost->resample_height = icodec->height - (frame_topBand + frame_bottomBand);
                }
                ost->encoding_needed = 1;
                ist->decoding_needed = 1;
                break;
            case CODEC_TYPE_SUBTITLE:
                ost->encoding_needed = 1;
                ist->decoding_needed = 1;
                break;
            default:
                abort();
                break;
            }
            /* two pass mode */
            if (ost->encoding_needed &&
                (codec->flags & (CODEC_FLAG_PASS1 | CODEC_FLAG_PASS2))) {
                char logfilename[1024];
                FILE *f;
                int size;
                char *logbuffer;

                snprintf(logfilename, sizeof(logfilename), "%s-%d.log",
                         pass_logfilename_prefix ? pass_logfilename_prefix : DEFAULT_PASS_LOGFILENAME_PREFIX,
                         i);
                if (codec->flags & CODEC_FLAG_PASS1) {
                    f = fopen(logfilename, "w");
                    if (!f) {
                        fprintf(stderr, "Cannot write log file '%s' for pass-1 encoding: %s\n", logfilename, strerror(errno));
                        av_exit(1);
                    }
                    ost->logfile = f;
                } else {
                    /* read the log file */
                    f = fopen(logfilename, "r");
                    if (!f) {
                        fprintf(stderr, "Cannot read log file '%s' for pass-2 encoding: %s\n", logfilename, strerror(errno));
                        av_exit(1);
                    }
                    fseek(f, 0, SEEK_END);
                    size = ftell(f);
                    fseek(f, 0, SEEK_SET);
                    logbuffer = av_malloc(size + 1);
                    if (!logbuffer) {
                        fprintf(stderr, "Could not allocate log buffer\n");
                        av_exit(1);
                    }
                    size = fread(logbuffer, 1, size, f);
                    fclose(f);
                    logbuffer[size] = '\0';
                    codec->stats_in = logbuffer;
                }
            }
        }
        if(codec->codec_type == CODEC_TYPE_VIDEO){
            int size= codec->width * codec->height;
            bit_buffer_size= FFMAX(bit_buffer_size, 6*size + 200);
        }
    }

    if (!bit_buffer)
        bit_buffer = av_malloc(bit_buffer_size);
    if (!bit_buffer)
        goto fail;

    /* dump the file output parameters - cannot be done before in case
       of stream copy */
    for(i=0;i<nb_output_files;i++) {
        dump_format(output_files[i], i, output_files[i]->filename, 1);
    }

    /* dump the stream mapping */
    if (verbose >= 0) {
        fprintf(stderr, "Stream mapping:\n");
        for(i=0;i<nb_ostreams;i++) {
            ost = ost_table[i];
            fprintf(stderr, "  Stream #%d.%d -> #%d.%d",
                    ist_table[ost->source_index]->file_index,
                    ist_table[ost->source_index]->index,
                    ost->file_index,
                    ost->index);
            if (ost->sync_ist != ist_table[ost->source_index])
                fprintf(stderr, " [sync #%d.%d]",
                        ost->sync_ist->file_index,
                        ost->sync_ist->index);
            fprintf(stderr, "\n");
        }
    }

    /* open each encoder */
    for(i=0;i<nb_ostreams;i++) {
        ost = ost_table[i];
        if (ost->encoding_needed) {
            AVCodec *codec = output_codecs[i];
            if (!codec)
                codec = avcodec_find_encoder(ost->st->codec->codec_id);
            if (!codec) {
                fprintf(stderr, "Unsupported codec for output stream #%d.%d\n",
                        ost->file_index, ost->index);
                av_exit(1);
            }
            if (avcodec_open(ost->st->codec, codec) < 0) {
                fprintf(stderr, "Error while opening codec for output stream #%d.%d - maybe incorrect parameters such as bit_rate, rate, width or height\n",
                        ost->file_index, ost->index);
                av_exit(1);
            }
            extra_size += ost->st->codec->extradata_size;
        }
    }

    /* open each decoder */
    for(i=0;i<nb_istreams;i++) {
        ist = ist_table[i];
        if (ist->decoding_needed) {
            AVCodec *codec = input_codecs[i];
            if (!codec)
                codec = avcodec_find_decoder(ist->st->codec->codec_id);
            if (!codec) {
                fprintf(stderr, "Unsupported codec (id=%d) for input stream #%d.%d\n",
                        ist->st->codec->codec_id, ist->file_index, ist->index);
                av_exit(1);
            }
            if (avcodec_open(ist->st->codec, codec) < 0) {
                fprintf(stderr, "Error while opening codec for input stream #%d.%d\n",
                        ist->file_index, ist->index);
                av_exit(1);
            }
            //if (ist->st->codec->codec_type == CODEC_TYPE_VIDEO)
            //    ist->st->codec->flags |= CODEC_FLAG_REPEAT_FIELD;
        }
    }

    /* init pts */
    for(i=0;i<nb_istreams;i++) {
        ist = ist_table[i];
        is = input_files[ist->file_index];
        ist->pts = 0;
        ist->next_pts = AV_NOPTS_VALUE;
        ist->is_start = 1;
    }

    /* set meta data information from input file if required */
    for (i=0;i<nb_meta_data_maps;i++) {
        AVFormatContext *out_file;
        AVFormatContext *in_file;
        AVMetadataTag *mtag;

        int out_file_index = meta_data_maps[i].out_file;
        int in_file_index = meta_data_maps[i].in_file;
        if (out_file_index < 0 || out_file_index >= nb_output_files) {
            fprintf(stderr, "Invalid output file index %d map_meta_data(%d,%d)\n", out_file_index, out_file_index, in_file_index);
            ret = AVERROR(EINVAL);
            goto fail;
        }
        if (in_file_index < 0 || in_file_index >= nb_input_files) {
            fprintf(stderr, "Invalid input file index %d map_meta_data(%d,%d)\n", in_file_index, out_file_index, in_file_index);
            ret = AVERROR(EINVAL);
            goto fail;
        }

        out_file = output_files[out_file_index];
        in_file = input_files[in_file_index];


        mtag=NULL;
        while((mtag=av_metadata_get(in_file->metadata, "", mtag, AV_METADATA_IGNORE_SUFFIX)))
            av_metadata_set(&out_file->metadata, mtag->key, mtag->value);
        av_metadata_conv(out_file, out_file->oformat->metadata_conv,
                                    in_file->iformat->metadata_conv);
    }

    /* open files and write file headers */
    for(i=0;i<nb_output_files;i++) {
        os = output_files[i];
        if (av_write_header(os) < 0) {
            fprintf(stderr, "Could not write header for output file #%d (incorrect codec parameters ?)\n", i);
            ret = AVERROR(EINVAL);
            goto fail;
        }
        if (strcmp(output_files[i]->oformat->name, "rtp")) {
            want_sdp = 0;
        }
    }
    if (want_sdp) {
        print_sdp(output_files, nb_output_files);
    }

    if (!using_stdin && verbose >= 0) {
        fprintf(stderr, "Press [q] to stop encoding\n");
        url_set_interrupt_cb(decode_interrupt_cb);
    }
    term_init();

    key = -1;
    timer_start = av_gettime();

    for(; received_sigterm == 0;) {
        int file_index, ist_index;
        AVPacket pkt;
        double ipts_min;
        double opts_min;

    redo:
        ipts_min= 1e100;
        opts_min= 1e100;
        /* if 'q' pressed, exits */
        if (!using_stdin) {
            if (q_pressed)
                break;
            /* read_key() returns 0 on EOF */
            key = read_key();
            if (key == 'q')
                break;
        }

        /* select the stream that we must read now by looking at the
           smallest output pts */
        file_index = -1;
        for(i=0;i<nb_ostreams;i++) {
            double ipts, opts;
            ost = ost_table[i];
            os = output_files[ost->file_index];
            ist = ist_table[ost->source_index];
            if(no_packet[ist->file_index])
                continue;
            if(ost->st->codec->codec_type == CODEC_TYPE_VIDEO)
                opts = ost->sync_opts * av_q2d(ost->st->codec->time_base);
            else
                opts = ost->st->pts.val * av_q2d(ost->st->time_base);
            ipts = (double)ist->pts;
            if (!file_table[ist->file_index].eof_reached){
                if(ipts < ipts_min) {
                    ipts_min = ipts;
                    if(input_sync ) file_index = ist->file_index;
                }
                if(opts < opts_min) {
                    opts_min = opts;
                    if(!input_sync) file_index = ist->file_index;
                }
            }
            if(ost->frame_number >= max_frames[ost->st->codec->codec_type]){
                file_index= -1;
                break;
            }
        }
        /* if none, if is finished */
        if (file_index < 0) {
            if(no_packet_count){
                no_packet_count=0;
                memset(no_packet, 0, sizeof(no_packet));
                usleep(10000);
                continue;
            }
            break;
        }

        /* finish if recording time exhausted */
        if (opts_min >= (recording_time / 1000000.0))
            break;

        /* finish if limit size exhausted */
        if (limit_filesize != 0 && limit_filesize < url_ftell(output_files[0]->pb))
            break;

        /* read a frame from it and output it in the fifo */
        is = input_files[file_index];
        ret= av_read_frame(is, &pkt);
        if(ret == AVERROR(EAGAIN) && strcmp(is->iformat->name, "ffm")){
            no_packet[file_index]=1;
            no_packet_count++;
            continue;
        }
        if (ret < 0) {
            file_table[file_index].eof_reached = 1;
            if (opt_shortest)
                break;
            else
                continue;
        }

        no_packet_count=0;
        memset(no_packet, 0, sizeof(no_packet));

        if (do_pkt_dump) {
            av_pkt_dump_log(NULL, AV_LOG_DEBUG, &pkt, do_hex_dump);
        }
        /* the following test is needed in case new streams appear
           dynamically in stream : we ignore them */
        if (pkt.stream_index >= file_table[file_index].nb_streams)
            goto discard_packet;
        ist_index = file_table[file_index].ist_index + pkt.stream_index;
        ist = ist_table[ist_index];
        if (ist->discard)
            goto discard_packet;

        if (pkt.dts != AV_NOPTS_VALUE)
            pkt.dts += av_rescale_q(input_files_ts_offset[ist->file_index], AV_TIME_BASE_Q, ist->st->time_base);
        if (pkt.pts != AV_NOPTS_VALUE)
            pkt.pts += av_rescale_q(input_files_ts_offset[ist->file_index], AV_TIME_BASE_Q, ist->st->time_base);

        if(input_files_ts_scale[file_index][pkt.stream_index]){
            if(pkt.pts != AV_NOPTS_VALUE)
                pkt.pts *= input_files_ts_scale[file_index][pkt.stream_index];
            if(pkt.dts != AV_NOPTS_VALUE)
                pkt.dts *= input_files_ts_scale[file_index][pkt.stream_index];
        }

//        fprintf(stderr, "next:%"PRId64" dts:%"PRId64" off:%"PRId64" %d\n", ist->next_pts, pkt.dts, input_files_ts_offset[ist->file_index], ist->st->codec->codec_type);
        if (pkt.dts != AV_NOPTS_VALUE && ist->next_pts != AV_NOPTS_VALUE
            && (is->iformat->flags & AVFMT_TS_DISCONT)) {
            int64_t pkt_dts= av_rescale_q(pkt.dts, ist->st->time_base, AV_TIME_BASE_Q);
            int64_t delta= pkt_dts - ist->next_pts;
            if((FFABS(delta) > 1LL*dts_delta_threshold*AV_TIME_BASE || pkt_dts+1<ist->pts)&& !copy_ts){
                input_files_ts_offset[ist->file_index]-= delta;
                if (verbose > 2)
                    fprintf(stderr, "timestamp discontinuity %"PRId64", new offset= %"PRId64"\n", delta, input_files_ts_offset[ist->file_index]);
                pkt.dts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
                if(pkt.pts != AV_NOPTS_VALUE)
                    pkt.pts-= av_rescale_q(delta, AV_TIME_BASE_Q, ist->st->time_base);
            }
        }

        //fprintf(stderr,"read #%d.%d size=%d\n", ist->file_index, ist->index, pkt.size);
        if (output_packet(ist, ist_index, ost_table, nb_ostreams, &pkt) < 0) {

            if (verbose >= 0)
                fprintf(stderr, "Error while decoding stream #%d.%d\n",
                        ist->file_index, ist->index);
            if (exit_on_error)
                av_exit(1);
            av_free_packet(&pkt);
            goto redo;
        }

    discard_packet:
        av_free_packet(&pkt);

        /* dump report by using the output first video and audio streams */
        print_report(output_files, ost_table, nb_ostreams, 0);
    }

    /* at the end of stream, we must flush the decoder buffers */
    for(i=0;i<nb_istreams;i++) {
        ist = ist_table[i];
        if (ist->decoding_needed) {
            output_packet(ist, i, ost_table, nb_ostreams, NULL);
        }
    }

    term_exit();

    /* write the trailer if needed and close file */
    for(i=0;i<nb_output_files;i++) {
        os = output_files[i];
        av_write_trailer(os);
    }

    /* dump report by using the first video and audio streams */
    print_report(output_files, ost_table, nb_ostreams, 1);

    /* close each encoder */
    for(i=0;i<nb_ostreams;i++) {
        ost = ost_table[i];
        if (ost->encoding_needed) {
            av_freep(&ost->st->codec->stats_in);
            avcodec_close(ost->st->codec);
        }
    }

    /* close each decoder */
    for(i=0;i<nb_istreams;i++) {
        ist = ist_table[i];
        if (ist->decoding_needed) {
            avcodec_close(ist->st->codec);
        }
    }

    /* finished ! */

    ret = 0;
 fail1:
    av_freep(&bit_buffer);
    av_free(file_table);

    if (ist_table) {
        for(i=0;i<nb_istreams;i++) {
            ist = ist_table[i];
            av_free(ist);
        }
        av_free(ist_table);
    }
    if (ost_table) {
        for(i=0;i<nb_ostreams;i++) {
            ost = ost_table[i];
            if (ost) {
                if (ost->logfile) {
                    fclose(ost->logfile);
                    ost->logfile = NULL;
                }
                av_fifo_free(ost->fifo); /* works even if fifo is not
                                             initialized but set to zero */
                av_free(ost->pict_tmp.data[0]);
                if (ost->video_resample)
                    sws_freeContext(ost->img_resample_ctx);
                if (ost->resample)
                    audio_resample_close(ost->resample);
                if (ost->reformat_ctx)
                    av_audio_convert_free(ost->reformat_ctx);
                av_free(ost);
            }
        }
        av_free(ost_table);
    }
    return ret;
 fail:
    ret = AVERROR(ENOMEM);
    goto fail1;
}

#if 0
int file_read(const char *filename)
{
    URLContext *h;
    unsigned char buffer[1024];
    int len, i;

    if (url_open(&h, filename, O_RDONLY) < 0) {
        printf("could not open '%s'\n", filename);
        return -1;
    }
    for(;;) {
        len = url_read(h, buffer, sizeof(buffer));
        if (len <= 0)
            break;
        for(i=0;i<len;i++) putchar(buffer[i]);
    }
    url_close(h);
    return 0;
}
#endif

static void opt_format(const char *arg)
{
    /* compatibility stuff for pgmyuv */
    if (!strcmp(arg, "pgmyuv")) {
        pgmyuv_compatibility_hack=1;
//        opt_image_format(arg);
        arg = "image2";
        fprintf(stderr, "pgmyuv format is deprecated, use image2\n");
    }

    file_iformat = av_find_input_format(arg);
    file_oformat = guess_format(arg, NULL, NULL);
    if (!file_iformat && !file_oformat) {
        fprintf(stderr, "Unknown input or output format: %s\n", arg);
        av_exit(1);
    }
}

static void opt_video_rc_override_string(const char *arg)
{
    video_rc_override_string = arg;
}

static int opt_me_threshold(const char *opt, const char *arg)
{
    me_threshold = parse_number_or_die(opt, arg, OPT_INT64, INT_MIN, INT_MAX);
    return 0;
}

static int opt_verbose(const char *opt, const char *arg)
{
    verbose = parse_number_or_die(opt, arg, OPT_INT64, -10, 10);
    av_log_set_level(verbose);
    return 0;
}

static int opt_frame_rate(const char *opt, const char *arg)
{
    if (av_parse_video_frame_rate(&frame_rate, arg) < 0) {
        fprintf(stderr, "Incorrect value for %s: %s\n", opt, arg);
        av_exit(1);
    }
    return 0;
}

static int opt_bitrate(const char *opt, const char *arg)
{
    int codec_type = opt[0]=='a' ? CODEC_TYPE_AUDIO : CODEC_TYPE_VIDEO;

    opt_default(opt, arg);

    if (av_get_int(avcodec_opts[codec_type], "b", NULL) < 1000)
        fprintf(stderr, "WARNING: The bitrate parameter is set too low. It takes bits/s as argument, not kbits/s\n");

    return 0;
}

static void opt_frame_crop_top(const char *arg)
{
    frame_topBand = atoi(arg);
    if (frame_topBand < 0) {
        fprintf(stderr, "Incorrect top crop size\n");
        av_exit(1);
    }
    if ((frame_topBand % 2) != 0) {
        fprintf(stderr, "Top crop size must be a multiple of 2\n");
        av_exit(1);
    }
    if ((frame_topBand) >= frame_height){
        fprintf(stderr, "Vertical crop dimensions are outside the range of the original image.\nRemember to crop first and scale second.\n");
        av_exit(1);
    }
    frame_height -= frame_topBand;
}

static void opt_frame_crop_bottom(const char *arg)
{
    frame_bottomBand = atoi(arg);
    if (frame_bottomBand < 0) {
        fprintf(stderr, "Incorrect bottom crop size\n");
        av_exit(1);
    }
    if ((frame_bottomBand % 2) != 0) {
        fprintf(stderr, "Bottom crop size must be a multiple of 2\n");
        av_exit(1);
    }
    if ((frame_bottomBand) >= frame_height){
        fprintf(stderr, "Vertical crop dimensions are outside the range of the original image.\nRemember to crop first and scale second.\n");
        av_exit(1);
    }
    frame_height -= frame_bottomBand;
}

static void opt_frame_crop_left(const char *arg)
{
    frame_leftBand = atoi(arg);
    if (frame_leftBand < 0) {
        fprintf(stderr, "Incorrect left crop size\n");
        av_exit(1);
    }
    if ((frame_leftBand % 2) != 0) {
        fprintf(stderr, "Left crop size must be a multiple of 2\n");
        av_exit(1);
    }
    if ((frame_leftBand) >= frame_width){
        fprintf(stderr, "Horizontal crop dimensions are outside the range of the original image.\nRemember to crop first and scale second.\n");
        av_exit(1);
    }
    frame_width -= frame_leftBand;
}

static void opt_frame_crop_right(const char *arg)
{
    frame_rightBand = atoi(arg);
    if (frame_rightBand < 0) {
        fprintf(stderr, "Incorrect right crop size\n");
        av_exit(1);
    }
    if ((frame_rightBand % 2) != 0) {
        fprintf(stderr, "Right crop size must be a multiple of 2\n");
        av_exit(1);
    }
    if ((frame_rightBand) >= frame_width){
        fprintf(stderr, "Horizontal crop dimensions are outside the range of the original image.\nRemember to crop first and scale second.\n");
        av_exit(1);
    }
    frame_width -= frame_rightBand;
}

static void opt_frame_size(const char *arg)
{
    if (av_parse_video_frame_size(&frame_width, &frame_height, arg) < 0) {
        fprintf(stderr, "Incorrect frame size\n");
        av_exit(1);
    }
    if ((frame_width % 2) != 0 || (frame_height % 2) != 0) {
        fprintf(stderr, "Frame size must be a multiple of 2\n");
        av_exit(1);
    }
}


#define SCALEBITS 10
#define ONE_HALF  (1 << (SCALEBITS - 1))
#define FIX(x)    ((int) ((x) * (1<<SCALEBITS) + 0.5))

#define RGB_TO_Y(r, g, b) \
((FIX(0.29900) * (r) + FIX(0.58700) * (g) + \
  FIX(0.11400) * (b) + ONE_HALF) >> SCALEBITS)

#define RGB_TO_U(r1, g1, b1, shift)\
(((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +         \
     FIX(0.50000) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

#define RGB_TO_V(r1, g1, b1, shift)\
(((FIX(0.50000) * r1 - FIX(0.41869) * g1 -           \
   FIX(0.08131) * b1 + (ONE_HALF << shift) - 1) >> (SCALEBITS + shift)) + 128)

static void opt_pad_color(const char *arg) {
    /* Input is expected to be six hex digits similar to
       how colors are expressed in html tags (but without the #) */
    int rgb = strtol(arg, NULL, 16);
    int r,g,b;

    r = (rgb >> 16);
    g = ((rgb >> 8) & 255);
    b = (rgb & 255);

    padcolor[0] = RGB_TO_Y(r,g,b);
    padcolor[1] = RGB_TO_U(r,g,b,0);
    padcolor[2] = RGB_TO_V(r,g,b,0);
}

static void opt_frame_pad_top(const char *arg)
{
    frame_padtop = atoi(arg);
    if (frame_padtop < 0) {
        fprintf(stderr, "Incorrect top pad size\n");
        av_exit(1);
    }
    if ((frame_padtop % 2) != 0) {
        fprintf(stderr, "Top pad size must be a multiple of 2\n");
        av_exit(1);
    }
}

static void opt_frame_pad_bottom(const char *arg)
{
    frame_padbottom = atoi(arg);
    if (frame_padbottom < 0) {
        fprintf(stderr, "Incorrect bottom pad size\n");
        av_exit(1);
    }
    if ((frame_padbottom % 2) != 0) {
        fprintf(stderr, "Bottom pad size must be a multiple of 2\n");
        av_exit(1);
    }
}


static void opt_frame_pad_left(const char *arg)
{
    frame_padleft = atoi(arg);
    if (frame_padleft < 0) {
        fprintf(stderr, "Incorrect left pad size\n");
        av_exit(1);
    }
    if ((frame_padleft % 2) != 0) {
        fprintf(stderr, "Left pad size must be a multiple of 2\n");
        av_exit(1);
    }
}


static void opt_frame_pad_right(const char *arg)
{
    frame_padright = atoi(arg);
    if (frame_padright < 0) {
        fprintf(stderr, "Incorrect right pad size\n");
        av_exit(1);
    }
    if ((frame_padright % 2) != 0) {
        fprintf(stderr, "Right pad size must be a multiple of 2\n");
        av_exit(1);
    }
}

static void list_fmts(void (*get_fmt_string)(char *buf, int buf_size, int fmt), int nb_fmts)
{
    int i;
    char fmt_str[128];
    for (i=-1; i < nb_fmts; i++) {
        get_fmt_string (fmt_str, sizeof(fmt_str), i);
        fprintf(stdout, "%s\n", fmt_str);
    }
}

static void opt_frame_pix_fmt(const char *arg)
{
    if (strcmp(arg, "list"))
        frame_pix_fmt = avcodec_get_pix_fmt(arg);
    else {
        list_fmts(avcodec_pix_fmt_string, PIX_FMT_NB);
        av_exit(0);
    }
}

static void opt_frame_aspect_ratio(const char *arg)
{
    int x = 0, y = 0;
    double ar = 0;
    const char *p;
    char *end;

    p = strchr(arg, ':');
    if (p) {
        x = strtol(arg, &end, 10);
        if (end == p)
            y = strtol(end+1, &end, 10);
        if (x > 0 && y > 0)
            ar = (double)x / (double)y;
    } else
        ar = strtod(arg, NULL);

    if (!ar) {
        fprintf(stderr, "Incorrect aspect ratio specification.\n");
        av_exit(1);
    }
    frame_aspect_ratio = ar;
}

static int opt_metadata(const char *opt, const char *arg)
{
    char *mid= strchr(arg, '=');

    if(!mid){
        fprintf(stderr, "Missing =\n");
        av_exit(1);
    }
    *mid++= 0;

    metadata_count++;
    metadata= av_realloc(metadata, sizeof(*metadata)*metadata_count);
    metadata[metadata_count-1].key  = av_strdup(arg);
    metadata[metadata_count-1].value= av_strdup(mid);

    return 0;
}

static void opt_qscale(const char *arg)
{
    video_qscale = atof(arg);
    if (video_qscale <= 0 ||
        video_qscale > 255) {
        fprintf(stderr, "qscale must be > 0.0 and <= 255\n");
        av_exit(1);
    }
}

static void opt_top_field_first(const char *arg)
{
    top_field_first= atoi(arg);
}

static int opt_thread_count(const char *opt, const char *arg)
{
    thread_count= parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
#if !HAVE_THREADS
    if (verbose >= 0)
        fprintf(stderr, "Warning: not compiled with thread support, using thread emulation\n");
#endif
    return 0;
}

static void opt_audio_sample_fmt(const char *arg)
{
    if (strcmp(arg, "list"))
        audio_sample_fmt = avcodec_get_sample_fmt(arg);
    else {
        list_fmts(avcodec_sample_fmt_string, SAMPLE_FMT_NB);
        av_exit(0);
    }
}

static int opt_audio_rate(const char *opt, const char *arg)
{
    audio_sample_rate = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
    return 0;
}

static int opt_audio_channels(const char *opt, const char *arg)
{
    audio_channels = parse_number_or_die(opt, arg, OPT_INT64, 0, INT_MAX);
    return 0;
}

static void opt_video_channel(const char *arg)
{
    video_channel = strtol(arg, NULL, 0);
}

static void opt_video_standard(const char *arg)
{
    video_standard = av_strdup(arg);
}

static void opt_codec(int *pstream_copy, char **pcodec_name,
                      int codec_type, const char *arg)
{
    av_freep(pcodec_name);
    if (!strcmp(arg, "copy")) {
        *pstream_copy = 1;
    } else {
        *pcodec_name = av_strdup(arg);
    }
}

static void opt_audio_codec(const char *arg)
{
    opt_codec(&audio_stream_copy, &audio_codec_name, CODEC_TYPE_AUDIO, arg);
}

static void opt_audio_tag(const char *arg)
{
    char *tail;
    audio_codec_tag= strtol(arg, &tail, 0);

    if(!tail || *tail)
        audio_codec_tag= arg[0] + (arg[1]<<8) + (arg[2]<<16) + (arg[3]<<24);
}

static void opt_video_tag(const char *arg)
{
    char *tail;
    video_codec_tag= strtol(arg, &tail, 0);

    if(!tail || *tail)
        video_codec_tag= arg[0] + (arg[1]<<8) + (arg[2]<<16) + (arg[3]<<24);
}

static void opt_video_codec(const char *arg)
{
    opt_codec(&video_stream_copy, &video_codec_name, CODEC_TYPE_VIDEO, arg);
}

static void opt_subtitle_codec(const char *arg)
{
    opt_codec(&subtitle_stream_copy, &subtitle_codec_name, CODEC_TYPE_SUBTITLE, arg);
}

static void opt_map(const char *arg)
{
    AVStreamMap *m;
    char *p;

    m = &stream_maps[nb_stream_maps++];

    m->file_index = strtol(arg, &p, 0);
    if (*p)
        p++;

    m->stream_index = strtol(p, &p, 0);
    if (*p) {
        p++;
        m->sync_file_index = strtol(p, &p, 0);
        if (*p)
            p++;
        m->sync_stream_index = strtol(p, &p, 0);
    } else {
        m->sync_file_index = m->file_index;
        m->sync_stream_index = m->stream_index;
    }
}

static void opt_map_meta_data(const char *arg)
{
    AVMetaDataMap *m;
    char *p;

    m = &meta_data_maps[nb_meta_data_maps++];

    m->out_file = strtol(arg, &p, 0);
    if (*p)
        p++;

    m->in_file = strtol(p, &p, 0);
}

static void opt_input_ts_scale(const char *arg)
{
    unsigned int stream;
    double scale;
    char *p;

    stream = strtol(arg, &p, 0);
    if (*p)
        p++;
    scale= strtod(p, &p);

    if(stream >= MAX_STREAMS)
        av_exit(1);

    input_files_ts_scale[nb_input_files][stream]= scale;
}

static int opt_recording_time(const char *opt, const char *arg)
{
    recording_time = parse_time_or_die(opt, arg, 1);
    return 0;
}

static int opt_start_time(const char *opt, const char *arg)
{
    start_time = parse_time_or_die(opt, arg, 1);
    return 0;
}

static int opt_rec_timestamp(const char *opt, const char *arg)
{
    rec_timestamp = parse_time_or_die(opt, arg, 0) / 1000000;
    return 0;
}

static int opt_input_ts_offset(const char *opt, const char *arg)
{
    input_ts_offset = parse_time_or_die(opt, arg, 1);
    return 0;
}

static enum CodecID find_codec_or_die(const char *name, int type, int encoder)
{
    const char *codec_string = encoder ? "encoder" : "decoder";
    AVCodec *codec;

    if(!name)
        return CODEC_ID_NONE;
    codec = encoder ?
        avcodec_find_encoder_by_name(name) :
        avcodec_find_decoder_by_name(name);
    if(!codec) {
        fprintf(stderr, "Unknown %s '%s'\n", codec_string, name);
        av_exit(1);
    }
    if(codec->type != type) {
        fprintf(stderr, "Invalid %s type '%s'\n", codec_string, name);
        av_exit(1);
    }
    return codec->id;
}

static void opt_input_file(const char *filename)
{
    AVFormatContext *ic;
    AVFormatParameters params, *ap = &params;
    int err, i, ret, rfps, rfps_base;
    int64_t timestamp;

    if (!strcmp(filename, "-"))
        filename = "pipe:";

    using_stdin |= !strncmp(filename, "pipe:", 5) ||
                    !strcmp(filename, "/dev/stdin");

    /* get default parameters from command line */
    ic = avformat_alloc_context();

    memset(ap, 0, sizeof(*ap));
    ap->prealloced_context = 1;
    ap->sample_rate = audio_sample_rate;
    ap->channels = audio_channels;
    ap->time_base.den = frame_rate.num;
    ap->time_base.num = frame_rate.den;
    ap->width = frame_width + frame_padleft + frame_padright;
    ap->height = frame_height + frame_padtop + frame_padbottom;
    ap->pix_fmt = frame_pix_fmt;
   // ap->sample_fmt = audio_sample_fmt; //FIXME:not implemented in libavformat
    ap->channel = video_channel;
    ap->standard = video_standard;
    ap->video_codec_id = find_codec_or_die(video_codec_name, CODEC_TYPE_VIDEO, 0);
    ap->audio_codec_id = find_codec_or_die(audio_codec_name, CODEC_TYPE_AUDIO, 0);
    if(pgmyuv_compatibility_hack)
        ap->video_codec_id= CODEC_ID_PGMYUV;

    set_context_opts(ic, avformat_opts, AV_OPT_FLAG_DECODING_PARAM);

    ic->video_codec_id   = find_codec_or_die(video_codec_name   , CODEC_TYPE_VIDEO   , 0);
    ic->audio_codec_id   = find_codec_or_die(audio_codec_name   , CODEC_TYPE_AUDIO   , 0);
    ic->subtitle_codec_id= find_codec_or_die(subtitle_codec_name, CODEC_TYPE_SUBTITLE, 0);
    ic->flags |= AVFMT_FLAG_NONBLOCK;

    /* open the input file with generic libav function */
    err = av_open_input_file(&ic, filename, file_iformat, 0, ap);
    if (err < 0) {
        print_error(filename, err);
        av_exit(1);
    }
    if(opt_programid) {
        int i;
        for(i=0; i<ic->nb_programs; i++)
            if(ic->programs[i]->id != opt_programid)
                ic->programs[i]->discard = AVDISCARD_ALL;
    }

    ic->loop_input = loop_input;

    /* If not enough info to get the stream parameters, we decode the
       first frames to get it. (used in mpeg case for example) */
    ret = av_find_stream_info(ic);
    if (ret < 0 && verbose >= 0) {
        fprintf(stderr, "%s: could not find codec parameters\n", filename);
        av_exit(1);
    }

    timestamp = start_time;
    /* add the stream start time */
    if (ic->start_time != AV_NOPTS_VALUE)
        timestamp += ic->start_time;

    /* if seeking requested, we execute it */
    if (start_time != 0) {
        ret = av_seek_frame(ic, -1, timestamp, AVSEEK_FLAG_BACKWARD);
        if (ret < 0) {
            fprintf(stderr, "%s: could not seek to position %0.3f\n",
                    filename, (double)timestamp / AV_TIME_BASE);
        }
        /* reset seek info */
        start_time = 0;
    }

    /* update the current parameters so that they match the one of the input stream */
    for(i=0;i<ic->nb_streams;i++) {
        AVCodecContext *enc = ic->streams[i]->codec;
        if(thread_count>1)
            avcodec_thread_init(enc, thread_count);
        enc->thread_count= thread_count;
        switch(enc->codec_type) {
        case CODEC_TYPE_AUDIO:
            set_context_opts(enc, avcodec_opts[CODEC_TYPE_AUDIO], AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_DECODING_PARAM);
            //fprintf(stderr, "\nInput Audio channels: %d", enc->channels);
            channel_layout = enc->channel_layout;
            audio_channels = enc->channels;
            audio_sample_rate = enc->sample_rate;
            audio_sample_fmt = enc->sample_fmt;
            input_codecs[nb_icodecs++] = avcodec_find_decoder_by_name(audio_codec_name);
            if(audio_disable)
                ic->streams[i]->discard= AVDISCARD_ALL;
            break;
        case CODEC_TYPE_VIDEO:
            set_context_opts(enc, avcodec_opts[CODEC_TYPE_VIDEO], AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM);
            frame_height = enc->height;
            frame_width = enc->width;
            if(ic->streams[i]->sample_aspect_ratio.num)
                frame_aspect_ratio=av_q2d(ic->streams[i]->sample_aspect_ratio);
            else
                frame_aspect_ratio=av_q2d(enc->sample_aspect_ratio);
            frame_aspect_ratio *= (float) enc->width / enc->height;
            frame_pix_fmt = enc->pix_fmt;
            rfps      = ic->streams[i]->r_frame_rate.num;
            rfps_base = ic->streams[i]->r_frame_rate.den;
            if(enc->lowres) enc->flags |= CODEC_FLAG_EMU_EDGE;
            if(me_threshold)
                enc->debug |= FF_DEBUG_MV;

            if (enc->time_base.den != rfps || enc->time_base.num != rfps_base) {

                if (verbose >= 0)
                    fprintf(stderr,"\nSeems stream %d codec frame rate differs from container frame rate: %2.2f (%d/%d) -> %2.2f (%d/%d)\n",
                            i, (float)enc->time_base.den / enc->time_base.num, enc->time_base.den, enc->time_base.num,

                    (float)rfps / rfps_base, rfps, rfps_base);
            }
            /* update the current frame rate to match the stream frame rate */
            frame_rate.num = rfps;
            frame_rate.den = rfps_base;

            input_codecs[nb_icodecs++] = avcodec_find_decoder_by_name(video_codec_name);
            if(video_disable)
                ic->streams[i]->discard= AVDISCARD_ALL;
            else if(video_discard)
                ic->streams[i]->discard= video_discard;
            break;
        case CODEC_TYPE_DATA:
            break;
        case CODEC_TYPE_SUBTITLE:
            input_codecs[nb_icodecs++] = avcodec_find_decoder_by_name(subtitle_codec_name);
            if(subtitle_disable)
                ic->streams[i]->discard = AVDISCARD_ALL;
            break;
        case CODEC_TYPE_ATTACHMENT:
        case CODEC_TYPE_UNKNOWN:
            nb_icodecs++;
            break;
        default:
            abort();
        }
    }

    input_files[nb_input_files] = ic;
    input_files_ts_offset[nb_input_files] = input_ts_offset - (copy_ts ? 0 : timestamp);
    /* dump the file content */
    if (verbose >= 0)
        dump_format(ic, nb_input_files, filename, 0);

    nb_input_files++;
    file_iformat = NULL;
    file_oformat = NULL;

    video_channel = 0;

    av_freep(&video_codec_name);
    av_freep(&audio_codec_name);
    av_freep(&subtitle_codec_name);
}

static void check_audio_video_sub_inputs(int *has_video_ptr, int *has_audio_ptr,
                                         int *has_subtitle_ptr)
{
    int has_video, has_audio, has_subtitle, i, j;
    AVFormatContext *ic;

    has_video = 0;
    has_audio = 0;
    has_subtitle = 0;
    for(j=0;j<nb_input_files;j++) {
        ic = input_files[j];
        for(i=0;i<ic->nb_streams;i++) {
            AVCodecContext *enc = ic->streams[i]->codec;
            switch(enc->codec_type) {
            case CODEC_TYPE_AUDIO:
                has_audio = 1;
                break;
            case CODEC_TYPE_VIDEO:
                has_video = 1;
                break;
            case CODEC_TYPE_SUBTITLE:
                has_subtitle = 1;
                break;
            case CODEC_TYPE_DATA:
            case CODEC_TYPE_ATTACHMENT:
            case CODEC_TYPE_UNKNOWN:
                break;
            default:
                abort();
            }
        }
    }
    *has_video_ptr = has_video;
    *has_audio_ptr = has_audio;
    *has_subtitle_ptr = has_subtitle;
}

static void new_video_stream(AVFormatContext *oc)
{
    AVStream *st;
    AVCodecContext *video_enc;
    int codec_id;

    st = av_new_stream(oc, oc->nb_streams);
    if (!st) {
        fprintf(stderr, "Could not alloc stream\n");
        av_exit(1);
    }
    avcodec_get_context_defaults2(st->codec, CODEC_TYPE_VIDEO);
    bitstream_filters[nb_output_files][oc->nb_streams - 1]= video_bitstream_filters;
    video_bitstream_filters= NULL;

    if(thread_count>1)
        avcodec_thread_init(st->codec, thread_count);

    video_enc = st->codec;

    if(video_codec_tag)
        video_enc->codec_tag= video_codec_tag;

    if(   (video_global_header&1)
       || (video_global_header==0 && (oc->oformat->flags & AVFMT_GLOBALHEADER))){
        video_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
        avcodec_opts[CODEC_TYPE_VIDEO]->flags|= CODEC_FLAG_GLOBAL_HEADER;
    }
    if(video_global_header&2){
        video_enc->flags2 |= CODEC_FLAG2_LOCAL_HEADER;
        avcodec_opts[CODEC_TYPE_VIDEO]->flags2|= CODEC_FLAG2_LOCAL_HEADER;
    }

    if (video_stream_copy) {
        st->stream_copy = 1;
        video_enc->codec_type = CODEC_TYPE_VIDEO;
        video_enc->sample_aspect_ratio =
        st->sample_aspect_ratio = av_d2q(frame_aspect_ratio*frame_height/frame_width, 255);
    } else {
        const char *p;
        int i;
        AVCodec *codec;
        AVRational fps= frame_rate.num ? frame_rate : (AVRational){25,1};

        if (video_codec_name) {
            codec_id = find_codec_or_die(video_codec_name, CODEC_TYPE_VIDEO, 1);
            codec = avcodec_find_encoder_by_name(video_codec_name);
            output_codecs[nb_ocodecs] = codec;
        } else {
            codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, CODEC_TYPE_VIDEO);
            codec = avcodec_find_encoder(codec_id);
        }

        video_enc->codec_id = codec_id;

        set_context_opts(video_enc, avcodec_opts[CODEC_TYPE_VIDEO], AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM);

        if (codec && codec->supported_framerates && !force_fps)
            fps = codec->supported_framerates[av_find_nearest_q_idx(fps, codec->supported_framerates)];
        video_enc->time_base.den = fps.num;
        video_enc->time_base.num = fps.den;

        video_enc->width = frame_width + frame_padright + frame_padleft;
        video_enc->height = frame_height + frame_padtop + frame_padbottom;
        video_enc->sample_aspect_ratio = av_d2q(frame_aspect_ratio*video_enc->height/video_enc->width, 255);
        video_enc->pix_fmt = frame_pix_fmt;
        st->sample_aspect_ratio = video_enc->sample_aspect_ratio;

        if(codec && codec->pix_fmts){
            const enum PixelFormat *p= codec->pix_fmts;
            for(; *p!=-1; p++){
                if(*p == video_enc->pix_fmt)
                    break;
            }
            if(*p == -1)
                video_enc->pix_fmt = codec->pix_fmts[0];
        }

        if (intra_only)
            video_enc->gop_size = 0;
        if (video_qscale || same_quality) {
            video_enc->flags |= CODEC_FLAG_QSCALE;
            video_enc->global_quality=
                st->quality = FF_QP2LAMBDA * video_qscale;
        }

        if(intra_matrix)
            video_enc->intra_matrix = intra_matrix;
        if(inter_matrix)
            video_enc->inter_matrix = inter_matrix;

        video_enc->thread_count = thread_count;
        p= video_rc_override_string;
        for(i=0; p; i++){
            int start, end, q;
            int e=sscanf(p, "%d,%d,%d", &start, &end, &q);
            if(e!=3){
                fprintf(stderr, "error parsing rc_override\n");
                av_exit(1);
            }
            video_enc->rc_override=
                av_realloc(video_enc->rc_override,
                           sizeof(RcOverride)*(i+1));
            video_enc->rc_override[i].start_frame= start;
            video_enc->rc_override[i].end_frame  = end;
            if(q>0){
                video_enc->rc_override[i].qscale= q;
                video_enc->rc_override[i].quality_factor= 1.0;
            }
            else{
                video_enc->rc_override[i].qscale= 0;
                video_enc->rc_override[i].quality_factor= -q/100.0;
            }
            p= strchr(p, '/');
            if(p) p++;
        }
        video_enc->rc_override_count=i;
        if (!video_enc->rc_initial_buffer_occupancy)
            video_enc->rc_initial_buffer_occupancy = video_enc->rc_buffer_size*3/4;
        video_enc->me_threshold= me_threshold;
        video_enc->intra_dc_precision= intra_dc_precision - 8;

        if (do_psnr)
            video_enc->flags|= CODEC_FLAG_PSNR;

        /* two pass mode */
        if (do_pass) {
            if (do_pass == 1) {
                video_enc->flags |= CODEC_FLAG_PASS1;
            } else {
                video_enc->flags |= CODEC_FLAG_PASS2;
            }
        }
    }
    nb_ocodecs++;

    /* reset some key parameters */
    video_disable = 0;
    av_freep(&video_codec_name);
    video_stream_copy = 0;
}

static void new_audio_stream(AVFormatContext *oc)
{
    AVStream *st;
    AVCodecContext *audio_enc;
    int codec_id;

    st = av_new_stream(oc, oc->nb_streams);
    if (!st) {
        fprintf(stderr, "Could not alloc stream\n");
        av_exit(1);
    }
    avcodec_get_context_defaults2(st->codec, CODEC_TYPE_AUDIO);

    bitstream_filters[nb_output_files][oc->nb_streams - 1]= audio_bitstream_filters;
    audio_bitstream_filters= NULL;

    if(thread_count>1)
        avcodec_thread_init(st->codec, thread_count);

    audio_enc = st->codec;
    audio_enc->codec_type = CODEC_TYPE_AUDIO;

    if(audio_codec_tag)
        audio_enc->codec_tag= audio_codec_tag;

    if (oc->oformat->flags & AVFMT_GLOBALHEADER) {
        audio_enc->flags |= CODEC_FLAG_GLOBAL_HEADER;
        avcodec_opts[CODEC_TYPE_AUDIO]->flags|= CODEC_FLAG_GLOBAL_HEADER;
    }
    if (audio_stream_copy) {
        st->stream_copy = 1;
        audio_enc->channels = audio_channels;
    } else {
        AVCodec *codec;

        set_context_opts(audio_enc, avcodec_opts[CODEC_TYPE_AUDIO], AV_OPT_FLAG_AUDIO_PARAM | AV_OPT_FLAG_ENCODING_PARAM);

        if (audio_codec_name) {
            codec_id = find_codec_or_die(audio_codec_name, CODEC_TYPE_AUDIO, 1);
            codec = avcodec_find_encoder_by_name(audio_codec_name);
            output_codecs[nb_ocodecs] = codec;
        } else {
            codec_id = av_guess_codec(oc->oformat, NULL, oc->filename, NULL, CODEC_TYPE_AUDIO);
            codec = avcodec_find_encoder(codec_id);
        }
        audio_enc->codec_id = codec_id;

        if (audio_qscale > QSCALE_NONE) {
            audio_enc->flags |= CODEC_FLAG_QSCALE;
            audio_enc->global_quality = st->quality = FF_QP2LAMBDA * audio_qscale;
        }
        audio_enc->thread_count = thread_count;
        audio_enc->channels = audio_channels;
        audio_enc->sample_fmt = audio_sample_fmt;
        audio_enc->channel_layout = channel_layout;

        if(codec && codec->sample_fmts){
            const enum SampleFormat *p= codec->sample_fmts;
            for(; *p!=-1; p++){
                if(*p == audio_enc->sample_fmt)
                    break;
            }
            if(*p == -1)
                audio_enc->sample_fmt = codec->sample_fmts[0];
        }
    }
    nb_ocodecs++;
    audio_enc->sample_rate = audio_sample_rate;
    audio_enc->time_base= (AVRational){1, audio_sample_rate};
    if (audio_language) {
        av_metadata_set(&st->metadata, "language", audio_language);
        av_free(audio_language);
        audio_language = NULL;
    }

    /* reset some key parameters */
    audio_disable = 0;
    av_freep(&audio_codec_name);
    audio_stream_copy = 0;
}

static void new_subtitle_stream(AVFormatContext *oc)
{
    AVStream *st;
    AVCodecContext *subtitle_enc;

    st = av_new_stream(oc, oc->nb_streams);
    if (!st) {
        fprintf(stderr, "Could not alloc stream\n");
        av_exit(1);
    }
    avcodec_get_context_defaults2(st->codec, CODEC_TYPE_SUBTITLE);