[MPlayer-users] help wanted: using mencoder to make NTSC DVD from transport stream

[Aaron Peterson]

On Sun, 6 Mar 2005 10:10:52 -0500, Aaron Peterson <dopplecoder at gmail.com> wrote:
> On Sun, 6 Mar 2005 09:49:21 -0500, Aaron Peterson <dopplecoder at gmail.com> wrote:
> > On Sun, 06 Mar 2005 09:46:25 +0100, Nico Sabbi <nsabbi at tiscali.it> wrote:
> > > Aaron Peterson wrote:
> > >
> > > >>If there are many and frequent frameskips add -mc 0 -noskip.
> > > >>
> > > >I tried this with a .wmv (that claims to be 1000 fps according to
> > > >mplayer?).  I used -ofps 30 and -oac mp3lame.  It came out looking
> > > >very nice, but the video lags noticeably behind the audio in the
> > > >resulting file.
> > >
> > > and without -mc 0 -noskip ?
> > > If you upload a sample to ftp://www.mplayerhq.hu/MPlayer/incoming and
> > > post the filename I will give it a look
> > >
> > > >I'm wondering what better techniques might be
> > > >employed in such situations.  Could I expect similar discrepancy if I
> > > >were re-encoding from mpeg4?  Will I encounter similar problems
> > > >anytime I try to modify the frame rate?  Or does this have more to do
> > > >with re-encoding the audio?
> > >
> > > I bet it has something to do with the container of the original file,
> > > in this case asf/wmv
> >
> > I tested with and without -mc 0 -noskip and got basically the same
> > result.  Lag in both cases.  So I take it from your surprise, that
> > this should work well with most files, and this is probably an
> > exceptional case?  I uploaded 3 files to /MPlayer/incoming/video_lag:
> > the script (basically only contains the mplayer command line
> > executed), the source file and the destination file.  Hope it's
> > helpful :-)
> >
> 
> I just tested (using the same commandline I put on ftp - with and
> without -mc 0 -noskip) with an .avi i made a while back from dvd with
> mencoder.  Same thing, noticeable video lag :-/  perhaps I've done
> something wrong...
> 

using -oac copy on the .avi (since it's already mp3 audio) instead of
re-encoding audio seems to solve this problem completely...