Legacy ImageMagick Discussions Archive

Hi,
I have a script that uses convert to process some png files into raw files.

This used to work
but now when I run it convert doesn't generate a file.

if I do this
it makes a file but in png format not raw - renaming the output to bar.png allows me to open it.

if I do this
I correctly get a raw file but it is rgb not grayscale.

So what is going on here, and how do you generate 16 bit grayscale raw files using convert these days?

We're using ImageMagick 6.4.4-1, the latest release, these commands work as expected (creates 16-bit gray image of the red channel):

• convert logo: -interlace none -depth 16 r:bar.raw
  display -size 640x480 -interlace none -depth 16 gray:bar.raw

Do these commands work for you?

I'm using the same version on windows and when I run that command no file is generated.
No errors but no output file.
Changing to rgb:bar.raw generates a file, but not the format I want.

When I run my script I get this error

convert: unable to open image `r:1.raw': No such file or directory

Again changing to rgb: means that files are generated but in the wrong format.

We tried these commands under Windows, ImageMagick 6.4.4-1, and they worked as expected:

• convert logo: -interlace none -depth 16 r:bar.raw
  convert -size 640x480 -interlace none -depth 16 gray:bar.raw bar.png

We're not sure why its failing for you.

if I do this

convert foo.png -depth 16 gray:bar.raw

I get a grayscale 16 bit raw file but when I open it the image is scrambled.

Damn this is annoying.

Is your input file a 16 bit grayscale png?

Ah! this does work
but I have to open with IBM byte order.

You can specify the byte order with the -endian option.

cheers that should do it

I found the problem.

I had a drive mapped to R: so instead of it using the raw format it wrote the file to the R: drive, something to look at perhaps....

You can work around the conflict with filenames like r:image.r or raw:image.r. See if that works.