ImageMagick ignores my alpha channel and lowers the bit depth

0
votes

Here's the image I'm working on:

enter image description here

Here's the MS_DOS command line:

convert "IM_Effect_Smoke_problem.png" -background transparent -crop 64x64+0+64! "IM_Effect_Smoke_problem_crop.png"

The problem is that ImageMagick reduces the color depth to 8 bits and ignores or destroys the alpha channel.

Can anyone tell me how to fix this? Thanks!!!

1
image-processingimagemagicktransparency

1 Answers

1
votes

Testing the command with ImageMagick 6.6.9-7, on Ubuntu, preserves the alpha channel. Maybe there the issue is with the version of ImageMagick you're using if you're sure the alpha channel is removed.