[FFmpeg-devel] [PATCH] swresample/options: change rematrix_maxval default to 1.0

[wm4]

On Fri, 6 Nov 2015 10:54:28 +0100
Michael Niedermayer <michael at niedermayer.cc> wrote:

> On Fri, Nov 06, 2015 at 08:52:32AM +0100, Nicolas George wrote:
> > Le sextidi 16 brumaire, an CCXXIV, Michael Niedermayer a écrit :  
> > > iam with whatever default people prefer  
> > 
> > IIRC, the current default yields different results when rematrixing from
> > float to float and then converting from float to int than when doing both in
> > a single step.  
> 
> yes, OTOH float -> float rematrix + "inverse" float->float should be
> closer to the original than with the changed default
> The difference between the defaults is in volume of the output
> 
> 
> > I beliee this is not good.  
> 
> no its not good, though the alternative isnt really good either.
> All choices have some kind of disadvantage. There also would be the
> possibility of implementing 2 pass mode to maintain the volume as much
> as possible without cliping (but that could not easily be default)
> For the default, the question is what people prefer ...

Do you mean some kind of DRC?