>>>>> "cenobyte" == cenobyte <[email protected]> writes:
> I forgot to mention a tip I have found useful for making ogv videos. I
> use ffmpeg2theora to convert clips I save from Youtube or what have
> you to Nano size. I pass along the -x 320 -y 240 options as well as
> the -sameq. Make sure not to use the ffmpeg syntax of -s 320x240, that
> won't get you far. I have been experimenting with ripped DVD's and
> have converted one to size, but it is off sync (it was encoded off
> sync, not played back off sync). I have tried passing the --sync
> option along but so far no luck, the program will not begin
> encoding.
ffmpeg2theora seems to have some problems with syncing against mpeg
streams. As a workaround, you could use mencoder (i.e. the one that
ships with mplayer) to first transcode to a losslessly compressed .avi
file, then feed that .avi into ffmpeg2theora. Mencoder's sync handling
is superb. The resulting .avi file will have no per-frame timestamps so
ffmpeg2theora conversion won't introduce audio desync.
mencoder -oac pcm -ovc lavc -lavcopts vcodec=huffyuv:vstrict=-1 \
-o intermediate.avi
(maybe you'd want mencoder to already do the scaling:
-vf scale=320:240)
cheers,
David
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