[Ffmpeg-devel] [PATCH] fast h264 decoding

Reimar Döffinger Reimar.Doeffinger
Wed Jul 13 20:05:26 CEST 2005

On Wed, Jul 13, 2005 at 12:25:06PM -0500, Zoltan Hidvegi wrote:
> Reimar D?ffinger wrote:
> > It disables the deblocking step when fast is set, for the samples I have
> > it doesn't make a visual difference, but decoding time goes down from
> I thought that in h264 the deblocked image is used for motion
> prediction of future frames, which means that this would significantly
> degrade quality.  But I'm really not a h264 expert, so maybe I'm wrong.

Yes, probably. But for the case of high bitrate HDTV that doesn't really
matter *g*, whereas nearly twice the speed certainly does.
I think it would be really a good idea to have such an option, though I
am not sure if it should "re-use" the fast option or not (and e.g. create
a new one instead).

Reimar D?ffinger

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