[Theora-dev] using theora

Ralph Giles giles at xiph.org
Sun Sep 12 13:39:01 PDT 2004

On Sun, Sep 12, 2004 at 03:30:59PM -0500, John Kintree wrote:

> I've got a 750 MHz AMD Duron with 128 MBytes of RAM.  There was a message when 
> running encode that said compiling mplayer without CPU detection was a 
> possible optimization.

You don't mention doing any resampling; full dv resolution theora 
likely won't play back in realtime on that machine. You might try 
subsampling first, e.g. to 320x240. Also, make sure mplayer isn't 
dropping any frames.

Jan's ffmpeg2theora tool has switches to do this as part of a single 
step; it's easier to use than the pipes with mplayer. You might give 
that a try. http://www.v2v.cc/~j/ffmpeg2theora/

> Will optimizations reduce the encoding time 
> from 15 minutes to less than three minutes?

Yes. You might try the theora-mmx branch in svn; it's part of the way 


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