[FFmpeg-devel] [PATCH] swscale alpha channel support

[Benoit Fouet]

Michael Niedermayer wrote :
> On Tue, Mar 10, 2009 at 06:06:09PM +0000, M?ns Rullg?rd wrote:
>   
>> Carl Eugen Hoyos <cehoyos at ag.or.at> writes:
>>
>>     
>>> M?ns Rullg?rd <mans <at> mansr.com> writes:
>>>
>>>       
>>>>> +  echo "  --enable-swscale-alpha  enable alpha channel support in swscale"
>>>>>           
>>> What is bad about alpha channel support in swscale?
>>> (Why would somebody want it disabled?)
>>>       
>> Apparently it slows down the non-alpha paths ever so slightly.
>>     
>
> also it adds more code ...
> IMHO it would be best if all pixfmts could be disabled individually
>
>   

how would you think it would be better to disable them ?
 - disable a pixel format entirely ?
 - disable a pixel format as source format ?
 - disable a pixel format as a dest format ?
 - the two latter above ?

Ben