Issue - I have 282 .CR2(raw) photos that need to be converted in batch/mass to same time but don’t know how. OS - Vanilla OS 22.10 (Ubuntu)
- Can this be done with darktable? If so how?
- Any software recommendations for this? I rather not use online tools for privacy and compression reasons.
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With GNU Parallel and Imagemagick installed, this command should do it:
parallel convert {} {.}.jpg ::: *.cr2As always, backup your files before you run things some internet rando gave you.
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:
for file in *.cr2 ; do convert $file ${file%.cr2}.jpg doneThat 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.
Gimp has a batch mode and is open source iirc
got any instructions?
I’m a bit of a basic batch myself
That has to be deliberate doesn’t it?
Since you mentioned darktable I assume you already know this, but depending on the camera’s raws and the presets that imagemagick has for converting these photos the results might be undesirable if not inspected or tweaked. Not disparaging any advice given here, just mentioning that generally raws are edited on a case by case basis to fix camera artifacts and color issues. Hope the solutions others have posted work out for you!
Your best bet would be
imagemagickin command-linehttps://blog.nathantsoi.com/article/Batch_Convert_CR2_to_JPG/
Throw them into darktable and export them to JPEG
for 282 photos this will take ages
It’s actually pretty quick for me with 95% JPEGs. But your mileage may of course vary.
You can just select them all and export them into a folder. Maybe overnight?
