ffprobe.c

   1 /*
   2  * FFprobe : Simple Media Prober based on the FFmpeg libraries
   3  * Copyright (c) 2007-2010 Stefano Sabatini
   4  *
   5  * This file is part of FFmpeg.
   6  *
   7  * FFmpeg is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * FFmpeg is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with FFmpeg; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20  */
  21
  22 #include "config.h"
  23
  24 #include "libavformat/avformat.h"
  25 #include "libavcodec/avcodec.h"
  26 #include "libavcodec/opt.h"
  27 #include "libavutil/pixdesc.h"
  28 #include "libavdevice/avdevice.h"
  29 #include "cmdutils.h"
  30
  31 const char program_name[] = "FFprobe";
  32 const int program_birth_year = 2007;
  33
  34 static int do_show_format  = 0;
  35 static int do_show_streams = 0;
  36
  37 static int convert_tags                 = 0;
  38 static int show_value_unit              = 0;
  39 static int use_value_prefix             = 0;
  40 static int use_byte_value_binary_prefix = 0;
  41 static int use_value_sexagesimal_format = 0;
  42
  43 /* globals */
  44 static const OptionDef options[];
  45
  46 /* FFprobe context */
  47 static const char *input_filename;
  48 static AVInputFormat *iformat = NULL;
  49
  50 static const char *binary_unit_prefixes [] = { "", "Ki", "Mi", "Gi", "Ti", "Pi" };
  51 static const char *decimal_unit_prefixes[] = { "", "K" , "M" , "G" , "T" , "P"  };
  52
  53 static const char *unit_second_str          = "s"    ;
  54 static const char *unit_hertz_str           = "Hz"   ;
  55 static const char *unit_byte_str            = "byte" ;
  56 static const char *unit_bit_per_second_str  = "bit/s";
  57
  58 static char *value_string(char *buf, int buf_size, double val, const char *unit)
  59 {
  60     if (unit == unit_second_str && use_value_sexagesimal_format) {
  61         double secs;
  62         int hours, mins;
  63         secs  = val;
  64         mins  = (int)secs / 60;
  65         secs  = secs - mins * 60;
  66         hours = mins / 60;
  67         mins %= 60;
  68         snprintf(buf, buf_size, "%d:%02d:%09.6f", hours, mins, secs);
  69     } else if (use_value_prefix) {
  70         const char *prefix_string;
  71         int index;
  72
  73         if (unit == unit_byte_str && use_byte_value_binary_prefix) {
  74             index = (int) (log(val)/log(2)) / 10;
  75             index = av_clip(index, 0, FF_ARRAY_ELEMS(binary_unit_prefixes) -1);
  76             val /= pow(2, index*10);
  77             prefix_string = binary_unit_prefixes[index];
  78         } else {
  79             index = (int) (log10(val)) / 3;
  80             index = av_clip(index, 0, FF_ARRAY_ELEMS(decimal_unit_prefixes) -1);
  81             val /= pow(10, index*3);
  82             prefix_string = decimal_unit_prefixes[index];
  83         }
  84
  85         snprintf(buf, buf_size, "%.3f %s%s", val, prefix_string, show_value_unit ? unit : "");
  86     } else {
  87         snprintf(buf, buf_size, "%f %s", val, show_value_unit ? unit : "");
  88     }
  89
  90     return buf;
  91 }
  92
  93 static char *time_value_string(char *buf, int buf_size, int64_t val, const AVRational *time_base)
  94 {
  95     if (val == AV_NOPTS_VALUE) {
  96         snprintf(buf, buf_size, "N/A");
  97     } else {
  98         value_string(buf, buf_size, val * av_q2d(*time_base), unit_second_str);
  99     }
 100
 101     return buf;
 102 }
 103
 104 static const char *media_type_string(enum AVMediaType media_type)
 105 {
 106     switch (media_type) {
 107     case AVMEDIA_TYPE_VIDEO:      return "video";
 108     case AVMEDIA_TYPE_AUDIO:      return "audio";
 109     case AVMEDIA_TYPE_DATA:       return "data";
 110     case AVMEDIA_TYPE_SUBTITLE:   return "subtitle";
 111     case AVMEDIA_TYPE_ATTACHMENT: return "attachment";
 112     default:                      return "unknown";
 113     }
 114 }
 115
 116 static void show_stream(AVFormatContext *fmt_ctx, int stream_idx)
 117 {
 118     AVStream *stream = fmt_ctx->streams[stream_idx];
 119     AVCodecContext *dec_ctx;
 120     AVCodec *dec;
 121     char val_str[128];
 122     AVMetadataTag *tag = NULL;
 123     AVRational display_aspect_ratio;
 124
 125     printf("[STREAM]\n");
 126
 127     printf("index=%d\n",        stream->index);
 128
 129     if ((dec_ctx = stream->codec)) {
 130         if ((dec = dec_ctx->codec)) {
 131             printf("codec_name=%s\n",         dec->name);
 132             printf("codec_long_name=%s\n",    dec->long_name);
 133         } else {
 134             printf("codec_name=unknown\n");
 135         }
 136
 137         printf("codec_type=%s\n",         media_type_string(dec_ctx->codec_type));
 138         printf("codec_time_base=%d/%d\n", dec_ctx->time_base.num, dec_ctx->time_base.den);
 139
 140         /* print AVI/FourCC tag */
 141         av_get_codec_tag_string(val_str, sizeof(val_str), dec_ctx->codec_tag);
 142         printf("codec_tag_string=%s\n", val_str);
 143         printf("codec_tag=0x%04x\n", dec_ctx->codec_tag);
 144
 145         switch (dec_ctx->codec_type) {
 146         case AVMEDIA_TYPE_VIDEO:
 147             printf("width=%d\n",                   dec_ctx->width);
 148             printf("height=%d\n",                  dec_ctx->height);
 149             printf("has_b_frames=%d\n",            dec_ctx->has_b_frames);
 150             if (dec_ctx->sample_aspect_ratio.num) {
 151                 printf("sample_aspect_ratio=%d:%d\n", dec_ctx->sample_aspect_ratio.num,
 152                                                       dec_ctx->sample_aspect_ratio.den);
 153                 av_reduce(&display_aspect_ratio.num, &display_aspect_ratio.den,
 154                           dec_ctx->width  * dec_ctx->sample_aspect_ratio.num,
 155                           dec_ctx->height * dec_ctx->sample_aspect_ratio.den,
 156                           1024*1024);
 157                 printf("display_aspect_ratio=%d:%d\n", display_aspect_ratio.num,
 158                                                        display_aspect_ratio.den);
 159             }
 160             printf("pix_fmt=%s\n",                 dec_ctx->pix_fmt != PIX_FMT_NONE ?
 161                    av_pix_fmt_descriptors[dec_ctx->pix_fmt].name : "unknown");
 162             break;
 163
 164         case AVMEDIA_TYPE_AUDIO:
 165             printf("sample_rate=%s\n",             value_string(val_str, sizeof(val_str),
 166                                                                 dec_ctx->sample_rate,
 167                                                                 unit_hertz_str));
 168             printf("channels=%d\n",                dec_ctx->channels);
 169             printf("bits_per_sample=%d\n",         av_get_bits_per_sample(dec_ctx->codec_id));
 170             break;
 171         }
 172     } else {
 173         printf("codec_type=unknown\n");
 174     }
 175
 176     if (fmt_ctx->iformat->flags & AVFMT_SHOW_IDS)
 177         printf("id=0x%x\n", stream->id);
 178     printf("r_frame_rate=%d/%d\n",         stream->r_frame_rate.num,   stream->r_frame_rate.den);
 179     printf("avg_frame_rate=%d/%d\n",       stream->avg_frame_rate.num, stream->avg_frame_rate.den);
 180     printf("time_base=%d/%d\n",            stream->time_base.num,      stream->time_base.den);
 181     if (stream->language[0])
 182         printf("language=%s\n",            stream->language);
 183     printf("start_time=%s\n",   time_value_string(val_str, sizeof(val_str), stream->start_time,
 184                                                   &stream->time_base));
 185     printf("duration=%s\n",     time_value_string(val_str, sizeof(val_str), stream->duration,
 186                                                   &stream->time_base));
 187     if (stream->nb_frames)
 188         printf("nb_frames=%"PRId64"\n",    stream->nb_frames);
 189
 190     while ((tag = av_metadata_get(stream->metadata, "", tag, AV_METADATA_IGNORE_SUFFIX)))
 191         printf("TAG:%s=%s\n", tag->key, tag->value);
 192
 193     printf("[/STREAM]\n");
 194 }
 195
 196 static void show_format(AVFormatContext *fmt_ctx)
 197 {
 198     AVMetadataTag *tag = NULL;
 199     char val_str[128];
 200
 201     printf("[FORMAT]\n");
 202
 203     printf("filename=%s\n",         fmt_ctx->filename);
 204     printf("nb_streams=%d\n",       fmt_ctx->nb_streams);
 205     printf("format_name=%s\n",      fmt_ctx->iformat->name);
 206     printf("format_long_name=%s\n", fmt_ctx->iformat->long_name);
 207     printf("start_time=%s\n",       time_value_string(val_str, sizeof(val_str), fmt_ctx->start_time,
 208                                                       &AV_TIME_BASE_Q));
 209     printf("duration=%s\n",         time_value_string(val_str, sizeof(val_str), fmt_ctx->duration,
 210                                                       &AV_TIME_BASE_Q));
 211     printf("size=%s\n",             value_string(val_str, sizeof(val_str), fmt_ctx->file_size,
 212                                                  unit_byte_str));
 213     printf("bit_rate=%s\n",         value_string(val_str, sizeof(val_str), fmt_ctx->bit_rate,
 214                                                  unit_bit_per_second_str));
 215
 216     if (convert_tags)
 217         av_metadata_conv(fmt_ctx, NULL, fmt_ctx->iformat->metadata_conv);
 218     while ((tag = av_metadata_get(fmt_ctx->metadata, "", tag, AV_METADATA_IGNORE_SUFFIX)))
 219         printf("TAG:%s=%s\n", tag->key, tag->value);
 220
 221     printf("[/FORMAT]\n");
 222 }
 223
 224 static int open_input_file(AVFormatContext **fmt_ctx_ptr, const char *filename)
 225 {
 226     int err, i;
 227     AVFormatContext *fmt_ctx;
 228
 229     fmt_ctx = avformat_alloc_context();
 230
 231     if ((err = av_open_input_file(&fmt_ctx, filename, iformat, 0, NULL)) < 0) {
 232         print_error(filename, err);
 233         return err;
 234     }
 235
 236     /* fill the streams in the format context */
 237     if ((err = av_find_stream_info(fmt_ctx)) < 0) {
 238         print_error(filename, err);
 239         return err;
 240     }
 241
 242     dump_format(fmt_ctx, 0, filename, 0);
 243
 244     /* bind a decoder to each input stream */
 245     for (i = 0; i < fmt_ctx->nb_streams; i++) {
 246         AVStream *stream = fmt_ctx->streams[i];
 247         AVCodec *codec;
 248
 249         if (!(codec = avcodec_find_decoder(stream->codec->codec_id))) {
 250             fprintf(stderr, "Unsupported codec (id=%d) for input stream %d\n",
 251                     stream->codec->codec_id, stream->index);
 252         } else if (avcodec_open(stream->codec, codec) < 0) {
 253             fprintf(stderr, "Error while opening codec for input stream %d\n",
 254                     stream->index);
 255         }
 256     }
 257
 258     *fmt_ctx_ptr = fmt_ctx;
 259     return 0;
 260 }
 261
 262 static int probe_file(const char *filename)
 263 {
 264     AVFormatContext *fmt_ctx;
 265     int ret, i;
 266
 267     if ((ret = open_input_file(&fmt_ctx, filename)))
 268         return ret;
 269
 270     if (do_show_streams)
 271         for (i = 0; i < fmt_ctx->nb_streams; i++)
 272             show_stream(fmt_ctx, i);
 273
 274     if (do_show_format)
 275         show_format(fmt_ctx);
 276
 277     av_close_input_file(fmt_ctx);
 278     return 0;
 279 }
 280
 281 static void show_usage(void)
 282 {
 283     printf("Simple multimedia streams analyzer\n");
 284     printf("usage: ffprobe [OPTIONS] [INPUT_FILE]\n");
 285     printf("\n");
 286 }
 287
 288 static void opt_format(const char *arg)
 289 {
 290     iformat = av_find_input_format(arg);
 291     if (!iformat) {
 292         fprintf(stderr, "Unknown input format: %s\n", arg);
 293         exit(1);
 294     }
 295 }
 296
 297 static void opt_input_file(const char *arg)
 298 {
 299     if (input_filename) {
 300         fprintf(stderr, "Argument '%s' provided as input filename, but '%s' was already specified.\n",
 301                 arg, input_filename);
 302         exit(1);
 303     }
 304     if (!strcmp(arg, "-"))
 305         arg = "pipe:";
 306     input_filename = arg;
 307 }
 308
 309 static void show_help(void)
 310 {
 311     show_usage();
 312     show_help_options(options, "Main options:\n", 0, 0);
 313     printf("\n");
 314 }
 315
 316 static void opt_pretty(void)
 317 {
 318     show_value_unit              = 1;
 319     use_value_prefix             = 1;
 320     use_byte_value_binary_prefix = 1;
 321     use_value_sexagesimal_format = 1;
 322 }
 323
 324 static const OptionDef options[] = {
 325 #include "cmdutils_common_opts.h"
 326     { "convert_tags", OPT_BOOL, {(void*)&convert_tags}, "convert tag names to the FFmpeg generic tag names" },
 327     { "f", HAS_ARG, {(void*)opt_format}, "force format", "format" },
 328     { "unit", OPT_BOOL, {(void*)&show_value_unit}, "show unit of the displayed values" },
 329     { "prefix", OPT_BOOL, {(void*)&use_value_prefix}, "use SI prefixes for the displayed values" },
 330     { "byte_binary_prefix", OPT_BOOL, {(void*)&use_byte_value_binary_prefix},
 331       "use binary prefixes for byte units" },
 332     { "sexagesimal", OPT_BOOL,  {(void*)&use_value_sexagesimal_format},
 333       "use sexagesimal format HOURS:MM:SS.MICROSECONDS for time units" },
 334     { "pretty", 0, {(void*)&opt_pretty},
 335       "prettify the format of displayed values, make it more human readable" },
 336     { "show_format",  OPT_BOOL, {(void*)&do_show_format} , "show format/container info" },
 337     { "show_streams", OPT_BOOL, {(void*)&do_show_streams}, "show streams info" },
 338     { NULL, },
 339 };
 340
 341 int main(int argc, char **argv)
 342 {
 343     av_register_all();
 344 #if CONFIG_AVDEVICE
 345     avdevice_register_all();
 346 #endif
 347
 348     show_banner();
 349     parse_options(argc, argv, options, opt_input_file);
 350
 351     if (!input_filename) {
 352         show_usage();
 353         fprintf(stderr, "You have to specify one input file.\n");
 354         fprintf(stderr, "Use -h to get full help or, even better, run 'man ffprobe'.\n");
 355         exit(1);
 356     }
 357
 358     return probe_file(input_filename);
 359 }