[FFmpeg-devel] [PATCH]Add support for new transparency colourspaces to libopenjpeg

[Michael Bradshaw]

On Sun, Nov 4, 2012 at 8:26 AM, Michael Bradshaw <mjbshaw at gmail.com> wrote:

> On Sun, Nov 4, 2012 at 8:23 AM, Paul B Mahol <onemda at gmail.com> wrote:
>
>> On 11/4/12, Michael Bradshaw <mjbshaw at gmail.com> wrote:
>> > On Sun, Nov 4, 2012 at 7:50 AM, Carl Eugen Hoyos <cehoyos at ag.or.at>
>> wrote:
>> >
>> >> Hi!
>> >>
>> >> Not completely tested, but allows to do at least something with the new
>> >> YUVA
>> >> colourspaces.
>> >>
>> >> Please comment, Carl Eugen
>> >
>> >
>> > Interesting. Do you know if any other decoders can properly decode the
>> > alpha channel? Also, why not also include AV_PIX_FMT_YUVA420P,
>> > AV_PIX_FMT_YUVA422P, and AV_PIX_FMT_YUVA444P? Otherwise, I don't see
>> > anything wrong with it.
>>
>> They are already there...
>>
>
> Dang, I was hoping to get the second email off before anyone read that...
>
>
>> Reference decoders would just need to dump each component.
>
>
> I'm just unaware of any decoder that properly decodes the alpha channel
> and was wondering if anyone knew of one that decodes it properly. They can
> dump it, which is fine, but I'm curious to test with one that uses it.
>

My brain seems to half functioning this morning. I meant
decoder+application that decodes and uses the alpha channel, not just
decodes it.

Time for me to go wake up....