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

[Michael Niedermayer]

Hi

On Wednesday 17 April 2002 14:24, Felix Buenemann wrote:
> On Wednesday 17 April 2002 04:10, 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)
>
> oops thought 4mv == qpel :) Could you give a description of 4MV then?
4MV (MV= motion vector) so four motion vectors per macroblock instead of 1

>
> but prob is mencoder autodisables vhq on pass one, but does not autodisable
> v4mv at the same time, this leeads to libavcodec complaining that 4mv is
> only supported in HQ mode.
sure, ill fix hq&2pass in libavcodec ...

[...]

Michael