[Wonder-disc] Problem with ImageMagickProcessor

[Pascal R. <pr...@ma...>]

I'm playing a bit with ERAttachment to create thumbnail (so that  
everyone can upload their photo on wocommunity.org :-)) and when I try  
the ImageMagickProcessor (I installed ImageMagick with MacPorts), I  
get this :

	ImageMagickProcessor.processImage: [/opt/local/bin/convert, -limit,  
Memory, 128000000, -size, 160x160, -resize, 160x160, -unsharp,  
2.5x1+0.35+6, -quality, 90, /tmp/ 
ERAttachmentUpload-6081869734440864961.tmp[0], /tmp/ 
ERAttachmentUpload-6081869734440864961.tmp]

	déc. 29 21:59:04 WOCommunity[6001] (ImageMagickImageProcessor.java: 
126) WARN  er.attachment.thumbnail.ERImageProcessor  - Warning:  
ImageMagick convert returned with a value of 1, error = convert: no  
encode delegate for this image format `/tmp/ 
ERAttachmentUpload-6081869734440864961.tmp' @ constitute.c/WriteImage/ 
1145.

I guess this is because ImageMagick use the file extension to  
determine the type of image and since the file extension is .tmp, it  
can't resize the image. I looked at the "convert" command-line options  
and it look like we need to specify the file format before the  
filename, like this :

	jpeg:/tmp/1.tmp jpeg:/tmp/2.tmp

Before I try to patch ImageMagickProcessor to add those two arguments,  
I just want to see if a workaround exist or if I'm doing something  
wrong. And yes, a call to "convert" with the same arguments as  
ImageMagickProcessor use but with files with a .jpg extension works  
just fine, no error and the output file is resized.