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

[Michael Bradshaw]

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.