Bash rename 360 000 files using find -exec

Question

I've got around 360 000 files like:

./001/1/1.jpg
./001/1/2.jpg
./001/2/1.jpg
./002/1/1.jpg
./003/1/1.jpg
...
pattern: [60 dirs]/[1000 subdirs]/[4-10 files].jpg

I want to rename files using rename for example from *.jpg to *.jpeg. I can't do it with single rename, because I get the error argument list is too long.

Searching for solution, I figured out this, but it renames nothing:

find -maxdepth 2 -mindepth 2 -type d -exec rename -n 's/jpg/jpeg/' {}/* \;

When I check if the {} is expanded replacing rename with echo:

find -maxdepth 2 -mindepth 2 -type d -exec echo "rename -n 's/jpg/jpeg/' {}/*" \;

I get expected result:

rename -n 's/jpg/jpeg/' ./061/61430/*
rename -n 's/jpg/jpeg/' ./061/61431/*
...

If I run any of these rename commands, I rename works. So the should be problem with the {}.

Thank you for help!

Answer 1

In the first instance, * is expanded by the shell before it gets to rename (if it is expanded at all - I doubt anything matches {}/*), and if it isn't expanded, the command that is executed is rename with the three arguments -n, s/jpg/jpeg/ and some/path/*. That last argument is not the name of an existing file so rename does nothing.

Without shell globbing, the path is useless to rename.

So, instead, do:

find -maxdepth 3 -mindepth 3 -type f -iname '*.jpg' -exec rename -n 's/jpg$/jpeg/i' {} +

Use find's ability to build command lines as long as is possible with + instead of ;.

Answer 2

find  | prename 's/\.jpg$/.jpeg/'

or if you have oder files in the currunt directory

find 0[0-9][0-9] | prename 's/\.jpg$/.jpeg/'

Answer 3

You should not specify type d unless you want to rename only directories. To change extensions .jpg to .jpeg try

find . -maxdepth 2 -mindepth 2 -name '*.jpg' -exec sh -c 'echo mv -- "$0" "${0%%.jpg}.jpeg"' {} \;

Remove echo if you like what you see on the screen.

Answer 4

Here is an alternative way should rename happen to be missing:

find 0[0-6][0-9] -name "*.jpg" -exec sh -c 'for i do echo mv "$i" "${i%g}eg"; done' sh {} + 

Answer 5

Using cygwin, my version of rename does not have the regex replacement, nor does its rename [options] expression replacement file... syntax seem to work. Also, the bash suggestions fail with

... -c: line 0: unexpected EOF while looking for matching `"'
... -c: line 1: syntax error: unexpected end of file

Alas... there is always perl:

perl -MFile::Find -e 'find(sub{return unless /^(.*)\.jpg$/;`mv $_ $1.jpeg`}, ".")'