[FFmpeg-devel] [PATCH] MMX VP3 Loop Filter

[Diego Biurrun]

On Sat, Oct 04, 2008 at 06:34:11AM -0400, David Conrad wrote:
> On Oct 4, 2008, at 4:54 AM, Diego Biurrun wrote:
> 
> > On Sat, Oct 04, 2008 at 12:21:42AM -0400, David Conrad wrote:
> >>
> >> This was adapted from libtheora and gives an overall speedup of about
> >> 5%.
> >
> > Do you have benchmark numbers comparing FFmpeg and libtheora?
> 
> Using Elephant's Dream 1080p (forgot link) as a test file,  libtheora  
> was around 30% faster than FFmpeg last time I checked. This is mainly  
> due to a better method of decoding DCT coefficients (FFmpeg spends  
> about 25% of the decode time skipping blocks to find the block a  
> coefficient belongs to) and more cache-friendly code after that.
> 
> I'm working on porting those optimizations to FFmpeg, then I'll do  
> more in-depth benchmarks again.

Neat, that is very welcome.

Diego