[Ffmpeg-devel] [PATCH] matroska: set a better packet duration

[Chris]

> BTW the sample I sent in the previous email plays all jerky in ffplay.
> Maybe a problem reordering packets in the AVC parser ?
> 
> Steve

90% of mkv files (containing h264) I have tried to encode to mpeg2 result in
jerky mpegs. So much so that I have more or less given up on it. I see the
same jerkiness when converting your sample Steve: 

ffmpeg.exe -i ticket-a_aac.mkv -target dvd -an ticket-a_aac.mpg
FFmpeg version SVN-r6561, Copyright (c) 2000-2006 Fabrice Bellard, et al.
  configuration:  --enable-a52 --enable-gpl --enable-memalign-hack
--disable-debug
  libavutil version: 49.0.2
  libavcodec version: 51.25.0
  libavformat version: 51.6.0
  built on Nov 12 2006 20:43:30, gcc: 3.4.4 (mingw special)
[matroska @ 007073F4]Ignoring seekhead entry for ID=0x1549a966
[matroska @ 007073F4]Ignoring seekhead entry for ID=0x1654ae6b
[matroska @ 007073F4]Ignoring seekhead entry for ID=0x114d9b74
[matroska @ 007073F4]Ignoring seekhead entry for ID=0x1043a770
[matroska @ 007073F4]Ignoring seekhead entry for ID=0x1941a469
[matroska @ 007073F4]Unknown entry 0x73a4 in info header
[matroska @ 007073F4]Unknown track header entry 0x55aa - ignoring
[matroska @ 007073F4]Unknown track header entry 0x23314f - ignoring
[matroska @ 007073F4]Unknown track header entry 0x55ee - ignoring
[matroska @ 007073F4]Unknown track header entry 0xaa - ignoring
[matroska @ 007073F4]Unknown track header entry 0x55aa - ignoring
[matroska @ 007073F4]Unknown track header entry 0x23314f - ignoring
[matroska @ 007073F4]Unknown track header entry 0x55ee - ignoring
[matroska @ 007073F4]Unknown track header entry 0xaa - ignoring
[matroska @ 007073F4]Unknown matroska file header ID 0x1941a469
[matroska @ 007073F4]Unknown matroska file header ID 0x1043a770
Input #0, matroska, from 'ticket-a_aac.mkv':
  Duration: 00:00:50.0, bitrate: N/A
  Stream #0.0: Video: h264, yuv420p, 688x288, 25.00 fps(r)
  Stream #0.1: Audio: 0x0000, 48000 Hz, 5:1
Assuming PAL for target.
File 'ticket-a_aac.mpg' already exists. Overwrite ? [y/N] y
Output #0, dvd, to 'ticket-a_aac.mpg':
  Stream #0.0: Video: mpeg2video, yuv420p, 720x576, q=2-31, 6000 kb/s, 25.00
fps(c)
Stream mapping:
  Stream #0.0 -> #0.0
frame= 1250 q=2.0 Lsize=   11036kB time=50.0 bitrate=1809.6kbits/s
video:7042kB audio:0kB global headers:0kB muxing overhead 56.724449%

do you get the same? I can provide additional samples which convert to jerky
mpeg2 if that would help.

Regards,

Chris