[MPlayer-users] FFMpeg or MEncoder ODML problem

[Heimdall Midgard]

The problem I'm about to describe involves either ffmpeg or
mplayer. Since both projects are hosted at mplayerhq.hu, I'm
reporting this here first in the hope that this is not a bug but
a simple configuration issue.

The problem is with OpenDML AVIs encoded by MEncoder using
certain audio/video codec combinations. There's an "echoing"
effect in the audio of the OpenDML AVIs when I play them using
ffplay. The effect can also be heard in videos re-encoded from
the OpenDML AVIs via the ffmpeg libraries (for example, by using
the third party program ffmpeg2theora).

The command I use to produce the OpenDML AVIs is:

mencoder -vf eq2=1:1:-0.02:1,hqdn3d=8:16:6,pp=h1/v1,harddup -ovc lavc
-lavcopts vcodec=ffvhuff:vstrict=-2 -oac pcm -o output.avi input.avi

The input AVIs have the following properties (mplayer -identify):

ID_DEMUXER=avi
ID_VIDEO_FORMAT=DIVX
ID_VIDEO_BITRATE=2625512
ID_VIDEO_WIDTH=608
ID_VIDEO_HEIGHT=448
ID_VIDEO_FPS=12.000
ID_VIDEO_ASPECT=0.0000
ID_AUDIO_FORMAT=8192
ID_AUDIO_BITRATE=96000
ID_AUDIO_RATE=0
ID_AUDIO_NCH=0

Apparently the "echoing" effect only occurs with AVIs I encode
using a combination of PCM and a low compression video codec like
ffvhuff, ffv1 or huffyuv. I realize that ffvhuff and ffv1 are
experimental codecs. However the problem also occurs with AVIs
encoded using PCM and huffyuv.

The "echoing" effect does not occur: (1) if I encode without
OpenDML or (2) if I encode using high compression codecs like
MPEG4 or AC3.

Is this an FFMpeg or an MPlayer problem? Any suggestions or fixes?

-- 
Albert Einstein: Phantasie ist wichtiger als Wissen, denn Wissen ist begrenzt.