[FFmpeg-user] Encode VP9 (or VP8) WITH alpha channel

Carl Eugen Hoyos cehoyos at ag.or.at
Tue Jan 7 23:45:52 CET 2014

Carl Eugen Hoyos <cehoyos <at> ag.or.at> writes:

> Wagner Patriota <wagner.patriota <at> gmail.com> writes:
> > Sorry, actualy the encode with VP8 IS WORKING (I can 
> > see the transparency working with Google Chrome).
> > 
> > But I need also to decode it.
> Patch(es) welcome;-(

> Supporting it via the libvpx decoder wrapper would 
> probably not be very difficult.

The problem is that alpha is encoded in a very 
unusual way that makes supporting it more 
difficult than expected, even for the external 

Carl Eugen

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