How do I keep PNG transparency with ImageMagick?

[lassekongo83]

I've been googling like mad trying everything now. I can't find a solution to my problem.

This is the image I'm converting:

It's quite transparent, and when I rescale the image I want it to keep the exact same transparency.

Using this command: convert panel.png -liquid-rescale $width_in_percent%\!x100%\! PNG32:$screen_width-panel.png

I've tried putting these inside it (in all possible combinations):

-alpha on

-background transparent

-colorspace RGB

-channel RGBA

The image just loses all the transparency. I'm clueless... :(

I'm also wondering if liquid-rescale can ignore some pixels for the rounded left and right edges on the image. If not, is there another way to not make those stretch?

[sweetsam]

This might help.

[lassekongo83]

None of that worked. However, I managed to find something that did work a little bit...

convert panel.png -liquid-rescale $width_in_percent%\!x100%\! -channel A -fx A/2 -channel RGBA $screen_width-panel.png

Unfortunately that just makes the image about 50% transparent, it doesn't keep the original transparency.