[FFmpeg-devel] Channel mapping integration in af pan

Michael Niedermayer michaelni at gmx.at
Thu Jan 19 16:54:40 CET 2012

On Thu, Jan 19, 2012 at 10:26:09AM +0100, Nicolas George wrote:
> Le nonidi 29 nivôse, an CCXX, Michael Niedermayer a écrit :
> > its off topic but iam not sure 8 bit is enough for good quality
> It is the accuracy for the gain, not the accuracy for the data, I do not
> think it matters much.

iam pretty sure a talented listener can notice a 1% change in relative

also when your input is L+S, c*(R-S) and you convert that to mono and
compensate balance you turn relative volume error into absolute
volume and this will be very noticeable because its a sound vs
silence thing

> Anyway, I have added to my TODO list "implement double sample format for
> af_pan", so of the accuracy is a problem for someone, they can just use that
> sample format.

libswresample should be used for the rematrixing, it already supports
doing this in int16 and float
also optimizations will be added to libswresample


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