[FFmpeg-user] Preserving perceived loudness when downmixing audio from 5.1 AC3 to stereo AAC

Carl Eugen Hoyos cehoyos at ag.or.at
Mon Aug 5 20:44:30 CEST 2013

Francois Visagie <francois.visagie <at> gmail.com> writes:

> > As expected, the three output files are bit-identical.
> Thanks for doing this testing, which I repeated here.
> With
> [ff130d7] which I was using up to now, out2.wav differs 
> from the other two.

This changed in fe328f0

> However, it's the only one equally loud as the input file.

I suspect that this was unintended (they should be identical), 
but I may miss something.

Carl Eugen

More information about the ffmpeg-user mailing list