Running a batch with imagemagick
imagemagick
Solution
The problem here is that you're hitting the limit of how much you can put on a command line. You need to split it into chunks that will fit. This should work better:
find -name '*.png' -print0 | xargs -0 -r mogrify -format png
The `-print0` and `-0` are used to handle spaces in filenames, and the `-r` means don't run mogrify if there's nothing to do.
Problem
I need to save a bunch (several thousand) of images with imagemagick. I'm totally new to it, and its documentation seems totally opaque and totally labyrinth. Where's the quickstart guide? Looking at it, I think I want to use `mogrify`. so I cd to my program files directory where I installed imagemagick. I run `mogrify -format png *.png` as I see in various examples. It says: ``` mogrify: unable to open image `fgimg\': No such file or directory @ blob.c/OpenB lob/2489. mogrify: unable to open file `fgimg\' @ png.c/ReadPNGImage/2865. ``` How do I instruct it to run on all images in the subdirectory \fgimg? Thanks a lot!