Bashscripts.org

Hi everyone.

I am trying to write a simple script to recode all the .mp3 files in a folder to 160k using ffmpeg. I have one little problem, I would like the output file to be the same as the input file (rewrite) so ffmpeg warns you about this and asks you for confirmation (y/N). Is there a way to automatically "echo a y and an enter" (sorry for the poor explanation) for every question it asks? I have tryied the yes command but it infinitely prints y and the loop won't finish. This is the code I have written so far.



Is it possible to do something like this:



I guess the trick is in the piping/redirection... is the & correct? I know I can avoid this problem simpli not rewriting the original file, but I am curious and would like to enlighten my mind a bit. Thanks.

Use echo y | foo to connect echo's stdout to foo's stdin

Thanks Daenyth, I thought that would work, but it does not. ffmpeg stops and only encodes a few kilobytes.

Well, it turns out I am a bit stupid

If I am overwriting the original mp3 file, there is nowhere to read from to continue the conversion! It is not a BASH problem, it is a basic computing fact...

Thank you

could do something nice like:

You can also use a redirection for this.

for i in *.mp3; do
ffmpeg -i "$f" -ab 160k "$f" <<EOF
y
EOF
done

Not 100% sure it'll work for ffmpeg thou, but works fine with read

Best regards
Fredrik Eriksson