[FFmpeg-devel] [PATCH] vc2enc_dwt: use 32 bit coefficients by default

Christophe Gisquet christophe.gisquet at gmail.com
Sun May 8 10:02:25 CEST 2016

2016-05-07 21:48 GMT+02:00 Rostislav Pehlivanov <atomnuker at gmail.com>:
>  The costliest part of the encoder right now is encoding the coefficients
> (~36%). Slightly less-costly is rate control (~31%), and after that is the
> transform (~12%). There really isn't anything else, other than 3 copies
> (input image converted to signed and copied to a buffer, then because the
> transform is out of place there's a copy to another buffer and then back),
> but they don't take that much time.

Thanks for the detailed reply.

Anyway, patch ok with me, and I agree with Michael. I was just curious
of what an "improved fix" would do.


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