[FFmpeg-devel] [PATCH] Make decoding alpha optional for some codecs.

[Reimar Döffinger]

On Thu, Sep 19, 2013 at 08:40:34PM +0200, Reimar Döffinger wrote:
> For codecs where decoding of a whole plane can simply
> be skipped, we should offer applications to not decode
> alpha for better performance (ca. 30% less CPU usage
> and 40% reduced memory bandwidth).
> It also means applications do not need to implement support
> (even if it is rather simple) for YUVA formats in order to be
> able to play these files.
> Tested by manually hacking avcodec_default_get_format,
> suggestions for how to test in FATE welcome.

Removed that last sentence locally. Except for ffv1 this is tested
by FATE.
I'll push soon if no comments.