[LAU] rubberband and batch processing

[pete shorthose]

On Fri, 06 Jun 2008 15:13:13 +0200
Jan Weil <Jan.Weil at web.de> wrote:

> Am Freitag, den 06.06.2008, 14:02 +0100 schrieb Chris Cannam:
> > On 06/06/2008, M-.-n <nostromo at arkaos.net> wrote:
> > > [...] a script that I run after I checked it looks right
> > 
> > In that situation (where I'm not totally confident of my syntax) I
> > generally just start off using "echo" or something equally innocuous
> > instead of the command I really want to run.
> > 
> > e.g. for the loop I mentioned in my previous mail, start by running
> > 
> > for x in *.wav; do
> >    echo -t 0.8 "$x" "${x%%.wav}-100.wav"
> > done
> > 
> > then if that looks right, just up-arrow and replace echo with
> > rubberband or whatever your program is.
> > 
> > Doesn't work if your first argument happens to be one of those also
> > accepted by echo, of course.  Also doesn't tell you whether you've
> > handled spaces in the filenames correctly or not.
> 
> Regarding spaces in file names - took me a while to learn but now it
> comes in very handy (again Bash):
> 
> export IFS=$'\n'; for i in *.wav; do rubberband -T1.25 $i ${i%.wav}-100.wav; done

i spent far too long looking for that little gem myself. you want to be careful
to restore the IFS if running in your shell and not a script though. it might affect
later commands. </pedantry>

also, i've since found that you can achieve the same result by quoting the output
expansion string, ie:

 for i in *.wav; do rubberband -T1.25 $i "${i%.wav}"-100.wav; done

because wildcarded filenames are parsed as a whole on the input side, regardless of spaces.

cheers,
pete.