[MPlayer-dev-eng] mecoder w/multiple audio tracks

[D Richard Felker III]

On Wed, Apr 17, 2002 at 04:10:09AM +0200, Michael Niedermayer wrote:
> Hi
> 
> On Wednesday 17 April 2002 03:32, Felix Buenemann wrote:
> > Hi Arpi,
> >
> > could you add support to mencoder to multiplex multiple audiotrakcs with an
> > avi, at least in copy mode?
> > So let's say pass one we create frameno.avi with dvd audio 128, pass 2 use
> > current frameno.avi and add dvd audio 129, then in pass 3 and 4 take
> > suggested bitrate for video encoding and copy audiotrakcs from frameno.avi.
> >
> > Btw. you need to aso remove 4MV flag when HQ flag is not used with
> > mencoder, as qpel is only supported in hq mode (libavcodec).
> qpel encoding is not yet supported at all, 4MV without hq makes no sense as 
> 4MV is pretty slow at the moment and the compression/quality gain is small 
> while hq mode makes a much bigger difference (relatively)

IIRC, 4MV implies HQ, so if mencoder disables HQ for the first pass,
libavcodec may still auto-reenable it if 4MV is enabled. If this is
the case, it probably needs fixing...

Rich