this post was submitted on 25 Sep 2023
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With GNU Parallel and Imagemagick installed, this command should do it:
As always, backup your files before you run things some internet rando gave you.
Check out
mogrify. I think it's installed standard with ImageMagick, and it does wildcard conversions.Can
mogrifydo format conversion? I thought it was for editing images. It doesn't even seem to have a way to specify input and output filenames.Yes. I've used it to batch convert PNG and jpg to webp.
Thank you for this! I will test it out
Do you have an example?
I'm not sure what you're asking for. That's the command. Unless you meant an explanation?
The basic command is
convert filename.cr2 filename.jpg.That
parallelcommand runs theconvertcommand on all of the.cr2files in the current directory, running a bunch of them simultaneously.{}is replaced with the name of a file, and{.}is replaced with the filename without the extension.https://www.gnu.org/software/parallel/parallel_examples.html
If you didn't want to use parallel and are okay with it slowly converting one file at a time, you can just use a for loop:
That one uses some Bash variable magic to remove the .cr2 and add .jpg to the file name of the output file.
convertis smart enough that you can just give it an output name ending in .jpg and it knows it should convert the input file to JPEG.Example? They gave you the exact thing to run.