pktdumper debugging utility for demuxers. This tool dumps each AVPacket demuxed to...

make pktdumper LDFLAGS='-Llibavformat/ -lavformat'

Originally committed as revision 4044 to svn://svn.ffmpeg.org/ffmpeg/trunk

diff --git a/pktdumper.c b/pktdumper.c
new file mode 100644 (file)
index 0000000..fd5ab81
--- /dev/null
+++ b/pktdumper.c
@@ -0,0 +1,80 @@
+#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;
+}