Legacy ImageMagick Discussions Archive

For the the following command using MPC, I get an error:
convert: unable to open pixel cache `/var/tmp/magick-31255c8jH6vPkJTNn': No such file or directory @ error/cache.c/OpenPixelCache/3655.
convert: unable to persist pixel cache `/var/tmp/magick-31255c8jH6vPkJTNn' @ error/mpc.c/ReadMPCImage/944.
convert: no images defined `rose_hist.gif' @ error/convert.c/ConvertImageCommand/3212.



But it works fine with MIFF:

Recall MPC requires 2 files, one for metadata and another for the image pixels. You can't use it for stdin / stdout. We'll investigate permitting the metadata to pass through stdin / stdout while writing the image pixels to disk. If that fails, we'll issue a better exception message. We'll need a few days to add the patch to ImageMagick.

This worked in previous releases of IM. I will try to find out where it changed. It also fails in IM 7.

Note if need be I can switch to miff.


It worked at IM 6.8.6.10 and before and fails for 6.8.7.0 and after.

Nothing is obvious about any change to MCP in the changelog for 6.8.7.0

We can reproduce the problem you posted and have a patch in ImageMagick 6.9.1-1 Beta, available by sometime tomorrow. Thanks.