Folks:
I'm new here, but I've taken a look at the archives and don't think I've
seen anything about this sort of problem in the last year and a half.
Maybe no-one uses Nuppelvideo any more...
I did however, and as the Subject: line indicates, I've got a problem.
I'm on linux 2.6.10 kernel with transcode-1.0.2
If I play my .nuv file with 'mplayer 1.0-pre8' the A/V sync is fine.
If I transcode to .mpeg (MPEG-1 or MPEG2) and play with mplayer, the
sound is late by about a second at the start of the file and gets
progressively worse as time goes on (sound seems to be getting later by
1 or 2 seconds per minute).
I notice that 'transcode' announces that its nuppelvideo import filter
is dated sometime in 2002.
You may also care to note that I get this same A/V sync problem if I
transcode "by hand" using 'nuvplay' or 'mplayer' to get the sound as a
.wav file and 'lame' to encode it, along with using 'exportvideo' to get
the video and use 'mpeg2enc' to encode it. This is the route suggested
in the nuppelvideo package. Transcode may well be tripping over the same
problem (presumably shared in the 2002 import filter).
Note though that 'mplayer' isn't having this problem.
I've put a very short extract of both my .nuv file and .mpg (MPEG-2 as
it happens) on ftp://tallyho.bc.nu/pub/steve/nuvsyncproblem.tar.gz just
in case anyone wants to look at it. You should easily be able to see my
initial 1sec sync problem, though my clip is only about 12 seconds long
so you won't see the progressive sync slippage. The guy who blows a
whistle about 10 seconds into the clip illustrates the effect nicely.
The clip is 12 seconds long so as to keep file length down (currently
about 21Mb).
Any assistance appreciated.
Steve Hosgood
