[MEncoder-users] Separating each of the 6 channels of ac3 file into separate wav files

[L Lee]

On 9/24/09 3:45 AM, "socke" <socke-99 at gmx.de> wrote:

> I recently did some ac3 speed change (for conversion between 24000/1001
> and 25 fps). I used the following pipe to do so:
> 
> ffmpeg -v 0 -i "$AUDIOFILE" -f sox - \
> | sox -S -V -p -p speed 1.04270833333333 \
> | ffmpeg -v 0 -i - -acodec ac3 -ab 448000 -y "$AUDIOFILE2"

I tried it and it appears to be exactly what I've been looking for. Thanks
very much. You might want to consider using the "tempo" option rather than
the "speed" option so that pitch stays the same. In the current version of
SoX, I can't notice any quality degradation for small changes such as the
one in your example (my tempo factor is typically smaller than 1.0002).
Thanks again!

Laine Lee