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#include <avformat.h>
#include <limits.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#define PKTFILESUFF "_%08Ld_%02d_%010Ld_%06d_%c.bin"
static int usage(int ret)
{
fprintf(stderr, "dump (up to maxpkts) AVPackets as they are demuxed by libavformat.\n");
fprintf(stderr, "each packet is dumped in its own file named like `basename file.ext`_$PKTNUM_$STREAMINDEX_$STAMP_$SIZE_$FLAGS.bin\n");
fprintf(stderr, "pktdumper file [maxpkts]\n");
return ret;
}
int main(int argc, char **argv)
{
char fntemplate[PATH_MAX];
char pktfilename[PATH_MAX];
AVFormatContext *fctx;
AVPacket pkt;
int64_t pktnum = 0;
int64_t maxpkts = 0;
int err;
if (argc < 2)
return usage(1);
if (argc > 2)
maxpkts = atoi(argv[2]);
strncpy(fntemplate, argv[1], PATH_MAX-1);
if (strrchr(argv[1], '/'))
strncpy(fntemplate, strrchr(argv[1], '/')+1, PATH_MAX-1);
if (strrchr(fntemplate, '.'))
*strrchr(fntemplate, '.') = '\0';
if (strchr(fntemplate, '%')) {
fprintf(stderr, "can't use filenames containing '%%'\n");
return usage(1);
}
if (strlen(fntemplate) + sizeof(PKTFILESUFF) >= PATH_MAX-1) {
fprintf(stderr, "filename too long\n");
return usage(1);
}
strcat(fntemplate, PKTFILESUFF);
printf("FNTEMPLATE: '%s'\n", fntemplate);
// register all file formats
av_register_all();
err = av_open_input_file(&fctx, argv[1], NULL, 0, NULL);
if (err < 0) {
fprintf(stderr, "av_open_input_file: error %d\n", err);
return 1;
}
err = av_find_stream_info(fctx);
if (err < 0) {
fprintf(stderr, "av_find_stream_info: error %d\n", err);
return 1;
}
av_init_packet(&pkt);
while ((err = av_read_frame(fctx, &pkt)) >= 0) {
int fd;
snprintf(pktfilename, PATH_MAX-1, fntemplate, pktnum, pkt.stream_index, pkt.pts, pkt.size, (pkt.flags & PKT_FLAG_KEY)?'K':'_');
printf(PKTFILESUFF"\n", pktnum, pkt.stream_index, pkt.pts, pkt.size, (pkt.flags & PKT_FLAG_KEY)?'K':'_');
//printf("open(\"%s\")\n", pktfilename);
fd = open(pktfilename, O_WRONLY|O_CREAT, 0644);
write(fd, pkt.data, pkt.size);
close(fd);
pktnum++;
if (maxpkts && (pktnum >= maxpkts))
break;
}
return 0;
}
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