Convert filename extension to lowercase

jakev383 · 12-05-2008, 07:15 PM

I'm whipping up a script to convert my VOB movies to avi for me, and I want to convert the filename's extension to lowercase (if it isn't already). I'm currently grabbing just the movie's name and stripping off the extension using this:

Code:

name=$1
newmovie="${name%.vob}"

so I can convert the movies to {movie}.avi for the filename.
I have a bunch of VOB files already, but not all of them have .vob instead of .VOB. I don't want to change the case of the movie's name, just it's extension.
My script only takes 1 movie as the input, is that helps any.
Anyone have any tips to push me in the right direction?
Thanks.

ghostdog74 · 12-05-2008, 07:52 PM

if all you need to do is just change VOB to vob

Code:

for f in *.VOB; do mv "$f" ${f/VOB/vob}; done

billymayday · 12-05-2008, 07:58 PM

Here's a thought

#!/bin/sh

test=test.VOB

test1=$(echo $test | tr -d ".VOB")
test2=$(echo $test1 | tr -d ".vob")
echo $test2

test=test.vob

test1=$(echo $test | tr -d ".VOB")
test2=$(echo $test1 | tr -d ".vob")
echo $test2

Edit - I prefer the previous post

jakev383 · 12-06-2008, 07:42 AM

Thanks for the tips guys. I ended up going with this:

Code:

name=$1
ext=${name#*.}
if [ "$ext" != "vob" ]
        then
        if [ "$ext" != "VOB" ] 
                then
                echo "Not a VOB movie!"
                exit 1
        fi
convertname="${name%.VOB}"
echo "Changing file extention to lowercase"
mv "$name" "$convertname".vob
fi

jcookeman · 12-06-2008, 02:11 PM

Take in mind

Code:

ext=${name#*.}

will not work for a file name such as 'file.ok.vob'. You will need

Code:

ext=${name##*.}

Cheers

radoulov · 12-06-2008, 02:42 PM

Or:

If rename is available:

Code:

rename 's/VOB$/vob/' *.VOB

With Perl:

Code:

perl -e'
  map { $o=$_; s/[^.]+$/\L$&/; rename $o, $_ } 
    glob "*.VOB"
  '

With zsh:

Code:

autoload -U zmv
zmv -W '*.VOB' '*.vob'

jakev383 · 12-07-2008, 06:24 AM

Quote:

Originally Posted by jcookeman

Take in mind

Code:

ext=${name#*.}

will not work for a file name such as 'file.ok.vob'. You will need

Code:

ext=${name##*.}

Cheers

Thanks for the tip. I don't have any filenames like this now, but I'll make the change just in case for the future.