How do I escape a forward slash in keywords?

[kattjevfel]

I want to remove media/ in nitter filenames, while I can remove the media part, I cannot get rid of the slash, what am I doing wrong?

katt@main ~ » gallery-dl --ignore-config --option extractor.nitter.filename="{filename:Rmedia\///}.{extension}" https://nitter.net/kiwis58577942/status/1581604538930589696
[nitter.net][error] FilenameFormatError: Applying filename format string failed (ValueError: Unknown format code '/' for object of type 'str')

[mikf]

Your filename problem is most likely solved with e081b1f, which removes media/ from Nitter filenames.

As for your original question: Not possible.
You can change the "argument separator" from / to some other character with the format-separator option and then just use literal forward slashes as regular characters, but that option is global and affects everything else as well.
(I really need to implement a proper parser and better syntax for these format string options)

Alternatively, you could have used conditional format strings and removed the first 6 characters when filename starts with media/:

"filename.startswith('media/')": "{filename[6:]}.{extension}"

[kattjevfel]

Marking as solved since e081b1f does indeed solve the root issue.