[FFmpeg-devel] [PATCH] Support > 8 bit input in yuv2rgb.

[Loren Merritt]

On Thu, 7 Nov 2013, Reimar Döffinger wrote:

>> and whether that improvement in quality
>> is worth it re: the higher CPU use that you will have
>
> I have never measured it, but I don't think the CPU usage is a lot
> higher for decoding 10 bit (unless you talk about hardware vs. software
> decode) - and lower bitrate will reduce CPU usage in e.g. the CABAC part.
> I'd expect it is mostly memory bandwidth that about doubles, which of
> course can still make all the difference.

Most of the cpu cost of high depth is that it takes twice as many
arithmetic ops in most of the simd functions that munge pixels or dct
coefs.

--Loren Merritt