Sal wrote: > Oddly, "ffmpeg2theora mencoder.avi" doesn't quite work. It generates > a .ogg file where the video starts a second after the audio, so the whole > thing is out of sync right from the beginning. But "theora-encoder > mencoder.avi" (avi -> yuv -> example_encoder) works. If I'm not mistaken ffmpeg has issues with AVI files that contain audio samples before the video frames. I haven't really tracked down the problem, but it seems that ffmpeg discards all audio frames that are stored before the first video frame (physical, in the file itself). The standard AVI multiplexer does this to allow some prebuffering for the audio stream. We just multiplexed the source AVI-files, disabled audio/video interleaving and the gap at the start was gone.. Nils (not on this list, but I read on the web interface every once in a while)