problem converting psd files with transparency

[urbanDev]

I am trying to decrease the resolution of some psd files. The desired result is also psd. But it seems "convert" cannot handle the transparency in the proper way if the source file is psd. Taking a look into the metadata it appears the Num Channels is 3 instead of 5 (CMYK + transparency = 5)

I am using ImageMagick 6.5.0-2.

I tried this: 'convert source.psd -alpha on result.psd'

And I tried the rest of the alpha options also like '-alpha set' etc.

Does anyone have any thoughts?

[fmw42]

just a guess, but try

convert image.psd -channel cmyka -alpha on output.psd

[urbanDev]

Thank you for the idea. Unfortunately there is no success I got same output.

Thanks though...

[fmw42]

I would suggest you post your image so that the IM folks can review it and/or test with it.

[urbanDev]

You're right but I just created a test image like this.

http://urbanstudionyc.com/cmykTransparent.psd