[theora-dev] VP3 IDCT
dan at on2.com
Thu Mar 6 11:01:41 PST 2003
> From: Michael Niedermayer [mailto:michaelni at gmx.at]
> btw, does theora/vp3 have a maximum allowed keyframe (or
> co-located non-skiped
> non-intra macroblock) limit like mpeg* ? IMHO it should have
> one, otherwise
> different decoders with different IDCTs will drift too much
> like u mentioned
The DCT/IDCT in VP3 is 100% integer-based, so our philosophy is: you must duplicate it exactly. Drift is not allowed. Therefore maximum frames to a keyframe is unnecessary. There are reasons one might not want keyframes at all (except at the beginning of course).
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