Legacy ImageMagick Discussions Archive

Adding variance in the alpha channel of course results in 8-bit alpha. I believe that identify is correctly reporting the 1-bit alpha channel as stored in the PNG, not after some internal conversion (which would make identify largely useless IMO). The acid test is the application consuming the PNGs ...

I need to generate PNG32 files with 8-bit alpha channels. I consistently get a 1-bit alpha channel with commands such as: convert foo.jpg PNG32:out.png convert foo.jpg -define png:format=png32 out.png convert foo.jpg -define png:color-type=6 out.png convert foo.jpg -type truecolormatte PNG32:out.png ...