[FFmpeg-devel] [PATCH] libopenjpeg GRAY16 decoding

[Carl Eugen Hoyos]

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

> For gray8a, you find two samples in ticket #769, the small one is the
> useful one because it contains transparency, so test for example
> ffmpeg -i input.png out.jp2

> ffmpeg -i out.jp2 -pix_fmt rgba out.png

Sorry, this does not work (as explained in ticket #769), it should be
ffmpeg -i out.jp2 out.png

> and look if the resulting png file is still semi-transparent

Carl Eugen