[Ffmpeg-devel] matroska to vob frame skipping issue.

[Chris]

Hi,

I have been struggling with trying to encode matroska files (AC3 and h264
streams) to vobs. The encoding takes place but the resultant file plays very
jerky. It is like only every other frame is been encoded. This happens for
me on about 90% of such files.

I have uploaded an example of this issue - lots of panning which illustrates
the problem very well:

ftp://upload.mplayerhq.hu/MPlayer/incoming/matroska-to-vob-skipping


Here is my command line:

ffmpeg -i planet.earth.mkv -target dvd planet.earth.mpg
FFmpeg version SVN-r7159, Copyright (c) 2000-2006 Fabrice Bellard, et al.
  configuration:  --enable-a52 --enable-gpl --enable-memalign-hack
--disable-debug
  libavutil version: 49.1.0
  libavcodec version: 51.25.0
  libavformat version: 51.6.0
  built on Nov 23 2006 10:04:43, gcc: 3.4.4 (mingw special)
[matroska @ 00709434]Ignoring seekhead entry for ID=0x1549a966
[matroska @ 00709434]Ignoring seekhead entry for ID=0x1654ae6b
[matroska @ 00709434]Ignoring seekhead entry for ID=0x114d9b74
[matroska @ 00709434]Unknown entry 0x73a4 in info header
[matroska @ 00709434]Unknown track header entry 0x55aa - ignoring
[matroska @ 00709434]Unknown track header entry 0x23314f - ignoring
[matroska @ 00709434]Unknown track header entry 0x55ee - ignoring
[matroska @ 00709434]Unknown track header entry 0xaa - ignoring
[matroska @ 00709434]Unknown track header entry 0x55aa - ignoring
[matroska @ 00709434]Unknown track header entry 0x23314f - ignoring
[matroska @ 00709434]Unknown track header entry 0x55ee - ignoring
[matroska @ 00709434]Unknown track header entry 0xaa - ignoring
Input #0, matroska, from 'planet.earth.mkv':
  Duration: 00:01:02.3, bitrate: N/A
  Stream #0.0: Audio: ac3, 48000 Hz, 5:1
  Stream #0.1: Video: h264, yuv420p, 1280x720, 25.00 fps(r)
Assuming PAL for target.
Output #0, dvd, to 'planet.earth.mpg':
  Stream #0.0: Video: mpeg2video, yuv420p, 720x576, q=2-31, 6000 kb/s, 25.00
fps(c)
  Stream #0.1: Audio: ac3, 48000 Hz, 5:1, 448 kb/s
Stream mapping:
  Stream #0.1 -> #0.0
  Stream #0.0 -> #0.1
Press [q] to stop encoding
frame= 1557 q=2.0 Lsize=   29646kB time=62.2 bitrate=3902.0kbits/s
video:14759kB audio:3404kB global headers:0kB muxing overhead 63.221013%


Is this a know issue or a bug?

Thanks,

Chris