#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 [-nw] file [maxpkts]\n"); fprintf(stderr, "-n\twrite No file at all, only demux.\n"); fprintf(stderr, "-w\tWait at end of processing instead of quitting.\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 dontquit = 0; int nowrite = 0; int err; if ((argc > 1) && !strncmp(argv[1], "-", 1)) { if (strchr(argv[1], 'w')) dontquit = 1; if (strchr(argv[1], 'n')) nowrite = 1; argv++; argc--; } 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); if (!nowrite) { fd = open(pktfilename, O_WRONLY|O_CREAT, 0644); write(fd, pkt.data, pkt.size); close(fd); } pktnum++; if (maxpkts && (pktnum >= maxpkts)) break; } while (dontquit) sleep(60); return 0; }