That's the thing - i would probably try using Encode, but i don't know the from encoding. The to encoding is supposed to be utf8.

Or do you mean to say that UTF-8 and utf8 are different things?

but i don't know the from encoding

I think you can't do much harm by just trying 'UTF-8' as the from encoding :)

$filename = decode("UTF-8", $filename);
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When your file names are in fact in UTF-8, things will likely work out fine. Otherwise, you'll know they aren't UTF-8 encoded, and you can try some other encoding...

Thanks, it seems to work!