[FFmpeg-devel] [RFC] Feeding bit masks into encoders (particularly an ICO muxer)
Carl Eugen Hoyos
cehoyos at ag.or.at
Fri Aug 3 21:23:50 CEST 2012
Michael Bradshaw <mbradshaw <at> sorensonmedia.com> writes:
> When a BMP image is put in an ICO file, it is required to
> have an associated bitmask that specifies its transparency.
I may misunderstand you but FFmpeg's bmp encoder puts the
transparency information into the bmp (into the eight
"unused" bits of RGB32), so I suspect you can use the
information in the encoded image to produce the bitmask.
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