mplayer / bash question

[Dan Nelson]

In the last episode (Dec 29), Neil Short said:
> I'm trying to batch-rip audio files from a bunch of video files.
> 
> I have a directory full of *.vob files:
> 
> ls *.vob
> 01.vob  03.vob  05.vob  07.vob  09.vob  11.vob  13.vob
> 02.vob  04.vob  06.vob  08.vob  10.vob  12.vob
> 
> So I wrote a little command line script to rip wave files from all the
> vob's:
> 
> > ls *.vob |
> > while read f
> > do
> > mplayer -ao pcm:file=`basename $f .vob`.wav $f
> > done
> 
> the first 01.wav file is created successfully; but then the whole sh'bang
> exits without ripping the rest of the vob's:

Try this instead:

for f in *.vob ; do
 mplayer -ao pcm:file=${f%.vob}.wav $f
done

Uses the shell's native file globbing to expand the *.vob wildcard, and the
shell's native string processing functions to remove a suffix.  If that
still doesn't work, run the script with "sh -x" to turn debugging on, and
see what your variables are expanding to as the script runs.

-- 
	Dan Nelson
	dnelson at allantgroup.com