[theora] Accelerated video output with ffmpeg2theora 0.24

[j at v2v.cc]

startx wrote:
> 3.) using ffmpeg2theora 0.25 nightly build
> 
can you try with the nightly:
 ffmpeg2theora --inputfps 15/2 double_speed.3gp

this looks like another case of the container framerate beeing not the
actual framerate. will add the file to the samples with sync issues.
am sill searching for a good way to deal with those..

j