Legacy ImageMagick Discussions Archive

Hello!

I have a image sequence that has alpha... It was rendered in the wrong position, and I used mogrify to rotate them...

If I open them they still have alpha...

Then I use "montage -mode Concatenate -tile 8x" and the alpha is stripped... I tried several options (like -alpha and -depth) to no avail...

Can someone help me with that? (the input is the rotated png files, the output is another png file)

See Montage, Background and Transparency Handling
http://www.imagemagick.org/Usage/montage/#bg

however as you are concatenating, perhaps you want to use +/- append instead
http://www.imagemagick.org/Usage/layers/#append