Invalid result with capture variables

[gdommergue]

I have the following files in my folder:

pic_F01P01.jpg
pic_F01P02.jpg
pic_F01P03.jpg

I want to obtain:

F01P01.jpg
F01P02.jpg
F01P03.jpg

I was expecting this command to work, but it's not:

brename -p ".*F(\d\d)P(\d\d).*\.jpg" -r 'F$1P$2.jpg' -d
Searching for paths to rename...

  [OK] pic_F01P01.jpg -> F01.jpg
  [OK] pic_F01P02.jpg -> F02.jpg
  [OK] pic_F01P03.jpg -> F03.jpg

3 path(s) to be renamed

If i add a non alpha character to separate the $1 and the P, it works:

brename -p ".*F(\d\d)P(\d\d).*\.jpg" -r 'F$1-P$2.jpg' -d
Searching for paths to rename...

  [OK] pic_F01P01.jpg -> F01-P01.jpg
  [OK] pic_F01P02.jpg -> F01-P02.jpg
  [OK] pic_F01P03.jpg -> F01-P03.jpg

3 path(s) to be renamed

Exact same thing happens if i use -r "F\$1P\$2.jpg"
I'm on Ubuntu 22.04.3

[shenwei356]

Simply due to variable names.

$1P$2 represents $1P and $2. So you need to add brackets, using ${1}P${2}.

$ brename -p ".*F(\d\d)P(\d\d).*\.jpg" -r 'F${1}P$2.jpg' -d
Searching for paths to rename...

  [OK] pic_F01P01.jpg -> F01P01.jpg
  [OK] pic_F01P02.jpg -> F01P02.jpg
  [OK] pic_F01P03.jpg -> F01P03.jpg

3 path(s) to be renamed

[gdommergue]

Great, working like a charm now, good to know that, thanks for the fast reply!

[shenwei356]

Cheers!