[Ffmpeg-devel] [PATCH] Snow multiple reference frames
Fri May 26 10:56:16 CEST 2006
On Fri, May 26, 2006 at 01:53:20AM -0700, Loren Merritt wrote:
> * Reduces bitrate by anywhere from 0 to 15%. Very content dependent.
> * Doesn't modify mv prediction. It still takes a median of neighbors,
> regardless of which ref they used.
> * Doesn't work very well at low bitrate or with 8x8 partitions. Maybe
> I'm underestimating the cost of specifying refs, or maybe due to the
> above prediction? (but an exact rangecoder cost didn't help either.)
> * Slow encoding. Does a naive search over all available refs. A possible
> optimization that helped muchly in x264, would be to stop a motion search
> after fullpel or halfpel if the residual so far is much worse than some
> previously searched ref.
> +#define MAX_REF_FRAMES 8
Does this mean it stores the entire last 8 frames always? isn't this
extremely memory intensive?
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