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