[theora] ffmpeg2theora 0.25 synchronization issues when converting from .mov

Michael A. Peters mpeters at mac.com
Wed Sep 30 22:49:19 PDT 2009

Andrew Chew wrote:
> Has anyone noticed this?  I have a video made with Final Cut Pro,  
> which I convert to .mov via Compressor.  This .mov file plays back  
> fine in Quicktime.  But when I then use ffmpeg2theora to convert to  
> ogv, the video seems to play back too fast compared to the audio (I'm  
> using VLC 1.0.2, the latest I believe, to play back the ogv file, and  
> I also have an app that uses the recently released libtheora 1.1, and  
> I see the same sped-up video as with VLC).
> I'm wondering if it's a known problem, or if I'm the first to see this.

I've not seen that and I just re-encoded all my stuff to take advantage 
of 2 pass (using static x86_64 linux bin) - but I have seen audio/video 
issue going from mjpeg to ogv. I solved that issue by importing the 
mjpeg avi into kino and saving as dv and then using ffmpeg2theora.

I assume by .mov you mean h.264 w/ AAC ??

What happens when you export from FCP to mpeg2 and then run 
ffmpeg2theora on that?

For the record, I've not had any problems using older libtheora based 
players on ogv made with latest ffmpeg2theora.

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