I'm using Ubuntu 8.10 with Cinelerra from akirad repository.

Inputs:
mpeg2 video 29.97fps
ogg/vorbis audio clips scattered

Project is set to NTSC (29.97fps).

Whatever I render to -- there is an a/v sync issue, about 10 sec at ~1:40. Video is truncated (a percentage?)

With just video, no sound, I select render project and video is truncated. I import THAT video in and put sound on it and get good sync. (lots of loss and initial truncation make that not an option)

Originally the mpeg2 came from Record My Desktop as ogg/theora. Since Cinelerra had trouble with keyframes, I went to mpeg2. I've done this a variety of ways with ffmpeg and mencoder. The last was a copy paste from mencoder manual to make an NTSC DVD:

mencoder -oac lavc -ovc lavc -of mpeg -mpegopts format=dvd:tsaf  \
-vf scale=720:480,harddup -srate 48000 -af lavcresample=48000   -lavcopts \
vcodec=mpeg2video:vrc_buf_size=1835:vrc_maxrate=9800:vbitrate=5000:keyint=18:vstrict=0:acodec=ac3:abitrate=192:aspect=4/3 -ofps 30000/1001 -o bob.mpeg2 bob.ogg

I'm sure not the best way, but was grasping by then, seems like DVD NTSC would be importable.

What's the best way to get RecordMyDesktop ogg into Cinelerra?
Or even a simple correct way?
Or what am I doing wrong?

Any help is appreciated.



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