1.7.1-1: ImageMagick seems to lack jpeg support

Mon Mar 8 22:38:00 GMT 2010

The IM convert command handles jpeg images well.
I'm a novice with ImageMagick, but I don't normally see -geometry
used this way. I could be wrong with what you're trying to do, but
if you're simply trying to resize a test jpeg with the 600x notation
I'd guess you're resizing with intent to maintain the aspect ratio
and a final width of 600 pixels. The command line notation I'd use
to do that would be:
>convert test.jpg -resize 600x test-out.jpg

 --- Merek
Hope this helps. Sorry if I misunderstood the problem.
On 3/8/10, Nick White <cygwin-list@njw.me.uk> wrote:
· The command convert, from the ImageMagick suite, doesn't appear to
· have a properly configured jpeg decoder.
· # convert test.jpg -geometry 600x test-out.jpg
· convert: no decode delegate for this image format `test.jpg'.
· convert: missing an image filename `test-out.jpg'.
·
· Which would imply that jpegs should be readable and writable by
· convert, which they don't appear to be.
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