Maarten de Boer wrote:
1. I would like to export a number of wav files to mp3 files. Instead of
doing it one by one from audacity, how can I export them using a shell
script? I want to be able to set some basic tag info in a file and call
that file to fill in the mp3 tags automatically. In essence, I want to
call a script that converts all wav files in a directory to mp3 files.
And of course, I would like to be able to set the bitrate in the script.
Suggestions on which tool to use for this?
with bash, the following onelines does the trick:
for filename in *.wav; do lame $filename `echo $filename | sed s/wav$/mp3/`; done
ofcourse you can use all lame command line options. man lame will tell you
all.
(if you are not familiar with it, this may look a bit cryptical, but there
is nothing to it. the backticks mean: evaluate the expression within.
and the expression says: echo $filename | sed s/wav$/mp3/, which means:
feed the filename to the regular-expression-based replacement, which replaces 'wav' at the end of the line ($) with 'mp3')
Thanks. I am quite familiar with Bash scripting. I was only wanting to
get started on using the encoders in an automatic way.
2. I can export to ogg format from audacity. Can I do the same thing as
(1) for this as well? Does ogg format support tags.
almost the same with oggenc, except oggenc wants the output file with -o
for filename in *.wav; do oggenc -o `echo $filename | sed s/wav$/mp3/` $filename; done
note that the above will fail if your filenames contain spaces.
I usually use quotes, e.g. for your command above:
$> for filename in *.wav; do oggenc -o `echo "$filename" | sed
s/wav$/mp3/` "$filename"; done
but the above is not tested though; I make the filename in a different
command and then call the file moving command, whatever that may be.
->HS
ls *.wav | while read filename;
instead of
for filename in *.wav
would deal with that.
but as always, there are many other ways to do the same thing. this is\
just how i would do it.
maarten
