tools/pktdumper.c

   1 /*
   2  * Copyright (c) 2005 Francois Revol
   3  *
   4  * This file is part of FFmpeg.
   5  *
   6  * FFmpeg is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * FFmpeg is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with FFmpeg; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #include <limits.h>
  22 #include <fcntl.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27 #include "libavformat/avformat.h"
  28
  29 #define PKTFILESUFF "_%08"PRId64"_%02d_%010"PRId64"_%06d_%c.bin"
  30
  31 #undef strcat
  32
  33 static int usage(int ret)
  34 {
  35     fprintf(stderr, "dump (up to maxpkts) AVPackets as they are demuxed by libavformat.\n");
  36     fprintf(stderr, "each packet is dumped in its own file named like `basename file.ext`_$PKTNUM_$STREAMINDEX_$STAMP_$SIZE_$FLAGS.bin\n");
  37     fprintf(stderr, "pktdumper [-nw] file [maxpkts]\n");
  38     fprintf(stderr, "-n\twrite No file at all, only demux.\n");
  39     fprintf(stderr, "-w\tWait at end of processing instead of quitting.\n");
  40     return ret;
  41 }
  42
  43 int main(int argc, char **argv)
  44 {
  45     char fntemplate[PATH_MAX];
  46     char pktfilename[PATH_MAX];
  47     AVFormatContext *fctx;
  48     AVPacket pkt;
  49     int64_t pktnum = 0;
  50     int64_t maxpkts = 0;
  51     int donotquit = 0;
  52     int nowrite = 0;
  53     int err;
  54
  55     if ((argc > 1) && !strncmp(argv[1], "-", 1)) {
  56         if (strchr(argv[1], 'w'))
  57             donotquit = 1;
  58         if (strchr(argv[1], 'n'))
  59             nowrite = 1;
  60         argv++;
  61         argc--;
  62     }
  63     if (argc < 2)
  64         return usage(1);
  65     if (argc > 2)
  66         maxpkts = atoi(argv[2]);
  67     strncpy(fntemplate, argv[1], PATH_MAX-1);
  68     if (strrchr(argv[1], '/'))
  69         strncpy(fntemplate, strrchr(argv[1], '/')+1, PATH_MAX-1);
  70     if (strrchr(fntemplate, '.'))
  71         *strrchr(fntemplate, '.') = '\0';
  72     if (strchr(fntemplate, '%')) {
  73         fprintf(stderr, "can't use filenames containing '%%'\n");
  74         return usage(1);
  75     }
  76     if (strlen(fntemplate) + sizeof(PKTFILESUFF) >= PATH_MAX-1) {
  77         fprintf(stderr, "filename too long\n");
  78         return usage(1);
  79     }
  80     strcat(fntemplate, PKTFILESUFF);
  81     printf("FNTEMPLATE: '%s'\n", fntemplate);
  82
  83     // register all file formats
  84     av_register_all();
  85
  86     err = av_open_input_file(&fctx, argv[1], NULL, 0, NULL);
  87     if (err < 0) {
  88         fprintf(stderr, "av_open_input_file: error %d\n", err);
  89         return 1;
  90     }
  91
  92     err = av_find_stream_info(fctx);
  93     if (err < 0) {
  94         fprintf(stderr, "av_find_stream_info: error %d\n", err);
  95         return 1;
  96     }
  97
  98     av_init_packet(&pkt);
  99
 100     while ((err = av_read_frame(fctx, &pkt)) >= 0) {
 101         int fd;
 102         snprintf(pktfilename, PATH_MAX-1, fntemplate, pktnum, pkt.stream_index, pkt.pts, pkt.size, (pkt.flags & PKT_FLAG_KEY)?'K':'_');
 103         printf(PKTFILESUFF"\n", pktnum, pkt.stream_index, pkt.pts, pkt.size, (pkt.flags & PKT_FLAG_KEY)?'K':'_');
 104         //printf("open(\"%s\")\n", pktfilename);
 105         if (!nowrite) {
 106             fd = open(pktfilename, O_WRONLY|O_CREAT, 0644);
 107             write(fd, pkt.data, pkt.size);
 108             close(fd);
 109         }
 110         av_free_packet(&pkt);
 111         pktnum++;
 112         if (maxpkts && (pktnum >= maxpkts))
 113             break;
 114     }
 115
 116     av_close_input_file(fctx);
 117
 118     while (donotquit)
 119         sleep(60);
 120
 121     return 0;
 122 }