[PLUG] Video transcoding framerate problem: ogg -> avi

[Scott Garman]

Hello,

I'm going a bit crazy trying to do something that I think should be 
quite simple.

I'm creating some screencasts, using GTK RecordMyDesktop. It produces 
Ogg Theora video files. I need to convert these to AVI files for later 
processing.

Using mencoder, I'm finding that the framerate and length of the 
resulting video does not match the original by a long shot. A 10-minute 
ogg video comes out as 7 minutes after transcoding. According to GTK 
RecordMyDesktop, the framerate of the original should be 15fps.

mencoder has two options for framerate. -fps specifies the framerate of 
the original file, and -ofps specifies the framerate of the output file. 
Setting either or both of these to 15 still does not resolve the issue.

By trial and error I managed to create an output video of the expected 
length by setting -fps to 6.28. But this only applies to that particular 
video, and I have dozens more of different lengths to do the same to.

I've also tried using ffmpeg to do the conversion. It gets the length of 
the video correct but degrades the quality substantially, so I'd like to 
see if I can get mencoder to work properly.

Has anyone else encountered this before? I've gone down so many 
dead-ends via Google now that my head is spinning.

Thanks,

Scott