reverse zero packet dissapearence "feature"
[libav.git] / pktdumper.c
CommitLineData
0fa04b7f
FR
1#include <avformat.h>
2#include <limits.h>
3#include <fcntl.h>
4#include <stdio.h>
5#include <stdlib.h>
6#include <string.h>
7#include <unistd.h>
8
9#define PKTFILESUFF "_%08Ld_%02d_%010Ld_%06d_%c.bin"
10
11static int usage(int ret)
12{
13 fprintf(stderr, "dump (up to maxpkts) AVPackets as they are demuxed by libavformat.\n");
14 fprintf(stderr, "each packet is dumped in its own file named like `basename file.ext`_$PKTNUM_$STREAMINDEX_$STAMP_$SIZE_$FLAGS.bin\n");
15 fprintf(stderr, "pktdumper file [maxpkts]\n");
16 return ret;
17}
18
19int main(int argc, char **argv)
20{
21 char fntemplate[PATH_MAX];
22 char pktfilename[PATH_MAX];
23 AVFormatContext *fctx;
24 AVPacket pkt;
25 int64_t pktnum = 0;
26 int64_t maxpkts = 0;
27 int err;
28
29 if (argc < 2)
30 return usage(1);
31 if (argc > 2)
32 maxpkts = atoi(argv[2]);
33 strncpy(fntemplate, argv[1], PATH_MAX-1);
34 if (strrchr(argv[1], '/'))
35 strncpy(fntemplate, strrchr(argv[1], '/')+1, PATH_MAX-1);
36 if (strrchr(fntemplate, '.'))
37 *strrchr(fntemplate, '.') = '\0';
38 if (strchr(fntemplate, '%')) {
39 fprintf(stderr, "can't use filenames containing '%%'\n");
40 return usage(1);
41 }
42 if (strlen(fntemplate) + sizeof(PKTFILESUFF) >= PATH_MAX-1) {
43 fprintf(stderr, "filename too long\n");
44 return usage(1);
45 }
46 strcat(fntemplate, PKTFILESUFF);
47 printf("FNTEMPLATE: '%s'\n", fntemplate);
48
49 // register all file formats
50 av_register_all();
51
52 err = av_open_input_file(&fctx, argv[1], NULL, 0, NULL);
53 if (err < 0) {
54 fprintf(stderr, "av_open_input_file: error %d\n", err);
55 return 1;
56 }
57
58 err = av_find_stream_info(fctx);
59 if (err < 0) {
60 fprintf(stderr, "av_find_stream_info: error %d\n", err);
61 return 1;
62 }
63
64 av_init_packet(&pkt);
65
66 while ((err = av_read_frame(fctx, &pkt)) >= 0) {
67 int fd;
68 snprintf(pktfilename, PATH_MAX-1, fntemplate, pktnum, pkt.stream_index, pkt.pts, pkt.size, (pkt.flags & PKT_FLAG_KEY)?'K':'_');
69 printf(PKTFILESUFF"\n", pktnum, pkt.stream_index, pkt.pts, pkt.size, (pkt.flags & PKT_FLAG_KEY)?'K':'_');
70 //printf("open(\"%s\")\n", pktfilename);
71 fd = open(pktfilename, O_WRONLY|O_CREAT, 0644);
72 write(fd, pkt.data, pkt.size);
73 close(fd);
74 pktnum++;
75 if (maxpkts && (pktnum >= maxpkts))
76 break;
77 }
78
79 return 0;
80}