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

Andrew Chew andrew at okashistudios.com
Thu Oct 1 17:07:47 PDT 2009

I see that thread.  Cool.  Is anyone addressing this?  I can provide  
media that shows the problem.

What's interesting is that the speedup doesn't seem to be at the same  
rate.  For a particular video, the speedup is the same, but across  
different video files, the speedup varies.

I've been using libtheora 1.0 stuff for a while now, so I think this  
problem just showed up for me with libtheora 1.1.

On Sep 30, 2009, at 11:32 PM, Juhani Jaakola wrote:

> Yes, I have the same problem. I have tested versions 0.24 and 0.25.
> Please see thread "[theora] Accelerated video output with  
> ffmpeg2theora 0.24" in the archives of this mailing list.
> I have an AVI container with this stream:
>   Stream #0.0: Video: rawvideo, yuyv422, 720x576, 25.02 tbr, 25.02  
> tbn, 25.02 tbc
> Regards, JJ
> Andrew Chew [andrew at okashistudios.com] kirjoitti:
>> 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.
>> _______________________________________________
>> theora mailing list
>> theora at xiph.org
>> http://lists.xiph.org/mailman/listinfo/theora

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