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

[Don Moir]

> On Wed, Sep 18, 2013 at 1:33 PM, Kieran Kunhya <kierank at obe.tv> wrote:
>> This patch is a good idea for quick previews and the likes.

If it's the default behavior, maybe. If it's not the default behavior, you might have to dig up the option that would only work 
sometimes and probably add more confusion.

> and basically every video player. E.g. quicktime displays full
> transparency in Prores4444 as black and so does FCP. You only see the
> alpha if you actually have an overlay. So people building software for
> looking at single video clips would probably like it to behave the
> same and if that can be achieved with less CPU it definitely has
> value.

I suspect no measurable CPU decrease on a modern computer and some on older computers. If user has a computer that can barely keep 
up, well he has problems already.

Just saying, default should be that which in inherent in the video. Optional otherwise.