[MPlayer-dev-eng] [PATCH] Automatic downmix

[Clément Bœsch]

On Sun, Sep 26, 2010 at 11:04:00AM +0200, Nicolas George wrote:
> Le quintidi 5 vendémiaire, an CCXIX, Clément Bœsch a écrit :
> > OK. Then I attach two versions of the patch:
> >  - patch-auto-downmix-pan.diff: my naive/arbitrary values
> >  - patch-auto-downmix-pan-new-coeff.diff: with better values :)
> > I'm fine with both, but I think the second one is better. You to judge.
> 
> As I said, I already committed (the first one) when you wrote this. If

Oh, thanks!

> someone else wants to alter the coefficients, I am fine with it, but I find
> the "new" ones less readable and I do not think they would bring a better
> experience.

In fact, I assumed that rear channels (and auxilary, etc) should have
their loudness reduced since they are further.

But in fact, it may not be a good idea. As you can see in the python code,
I used those values:

  chlist = ('FL', 'FR', 'RL', 'RR', 'FC', 'LFE', 'AL', 'AR')
  LR = {
          'L': (1., 0., 1., 0., 0.707, 0.707, 1., 0.),
          'R': (0., 1., 0., 1., 0.707, 0.707, 0., 1.)
  }

Which in fact, seems simpler and quiet logical. Of course, normalized
values are not the same but ratio is kept.

Well anyway, thanks a lot for having the patch applied :)

Regards,

-- 
Clément B.