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andrewjames

Member

From: Canada, Ontario, Toronto

Registered: 2009-06-09

Posts: 19

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problem ffmpeg theora x11grab

I want to record the monitor, screen in ffmpeg codec theora.  I did command

ffmpeg -f x11grab -r 20 -s 1280x800 -i :0.0 -vcodec libtheora /temporary/recordmonitor.ogv

In the terminal the time= value moves irregularly slowly, for example time=0.03 after 1 second then time=0.6 after five seconds.  The file final 'recordmonitor.ogv' is short (not even five seconds) and lack quality.

If the codec is h264, the file is as I want, but the format.

ffmpeg -f x11grab -r 20 -s 1280x800 -i :0.0 -vcodec libx264 /temporary/recordmonitor.avi

A further confusion is that ffmpeg2theora can encode a raw video from ffmpeg.  Then the video is as I want and format is theora, but more work for me.  Note, huffyuv is format video lossless.

ffmpeg -f x11grab -r 20 -s 1280x800 -i :0.0 -vcodec huffyuv /temporary/recordmonitor.avi
ffmpeg2theora /temporary/recordmonitor.avi

Anyone else know this problem?  What is the problem with ffmpeg libtheora?

For the convience, less disc used, less commands, less time, I would rather encode a video of x11grab directly to theora with one command (ffmpeg).

Last edited by andrewjames (2009-10-29 04:43:02)

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andrew james