[MEncoder-users] re-encoding avi to normalise sounds (and turn into 5.1)

Rich Felker dalias at aerifal.cx
Mon Jan 7 08:02:31 CET 2008


On Mon, Jan 07, 2008 at 07:27:42AM +0100, Jiří Heryán wrote:
> Alex Samad píše v Ne 06. 01. 2008 v 16:23 +1100:
> > > > I do my work
> > > >  mencoder a.avi -o b.avi -ovc copy -oac lavc -lavcopts acodec=ac3 -af 
> > > > volnorm=1,surround=15,center,sub -channels 6
> > > > 
> > > > it finished okay, but when I play it, the sound volume has increased, but when 
> > > > I try to skip ahead or backwards the sounds starts from the beginning
> > > > 
> Mencoder is IMHO broken,

This is true.

> probably for better purity of the code (see

This is utter nonsense. Saying "purity of the code" about MEncoder is
like a Catholic prostitute saying she doesn't use condoms for the sake
of her purity...

> endless discusions about hacks in AVI few years ago). It is stupid,
> because libavcodec does not contain audio codec compatible with default
> container (Congratulations boys, good work!).

Huh? Encoding AC3 with lavc and storing it in AVI should work just
fine. If not it's a bug, and I'm sure everyone would be happy if you
would track it down and explain what's happening (e.g. what incorrect
values are written to headers or what incorrect framing is used,
etc...)

Rich



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