[FFmpeg-devel] libavcodec/hap : add HapAlphaOnly decoding/encoding

Carl Eugen Hoyos ceffmpeg at gmail.com
Tue Oct 10 00:36:50 EEST 2017

2017-10-09 21:34 GMT+02:00 Martin Vignali <martin.vignali at gmail.com>:

>>> IMHO, from a compositing point of view, alpha only and gray is
>>> the same thing.
>>> It's common (in cgi compositing for example), to use alpha (or
>>> matte) as separate gray only file.
>> If this is what you believe, I don't think an RGBA representation
>> should be committed.
> This is not about what i believe ! :-)

I think it is.
I asked you to explain why it is a good idea to map alpha only
to rgba and if this is what users expect. Your answer seems
to indicate that you share my feeling that it would be unexpected.

Carl Eugen

More information about the ffmpeg-devel mailing list