[linux-dvb] Re: VDR files to VOB

[Jarkko Santala <jake@iki.fi>]

On Wed, 14 Aug 2002, Jeremy Hall wrote:

> Have you tried with a low latency and/or preemptable kernel? You may find
> the results more favourable.

I could try, yes. Actually, I have a bigger problem with my system. This
may sound ridiculous, but in order to be able to save stream directly to
disk with dvbstream without errors, I either have to play something via
dxr3 or have 'dd if=/dev/zero of=/dev/null' running in the background. If
I don't dvbtune -m will show hundreds of BlockErrors.

I suspect this is some kind of weird hardware problem, the system is
AMD K6-2 with SiS motherboard chipset. I've tried just about all BIOS
options and everything that might make a difference in the 2.4.1[89]
kernels I've been using.

Any ideas on this mystery would be greatly appreciated. And don't tell me
that's stupid and it can't be. That's just how it is. :-/

	-jake

> In the new year, Jarkko Santala wrote:
> > On Wed, 14 Aug 2002, Tomi Ollila wrote:
> >
> > > When I've saved dvb data using `dvbstream <vpid> <apid> -o -ps >file.mpg'
> > > and run the output using mplayer, I've got a/v sync difference of 400ms
> > > (sound ahead of that much). I've quessed (so far) that the problem is
> > > w/ soundcard (and sound drivers) -- I have Soundblaster 64 and I don't know
> > > how well it copes w/ 48000 bps sound.
> > >
> > > A friend of mine has used MPlayer's mencoder to encode some of his
> > > recordings to be replayed at later date and the resulting AVI is in
> > > perfect sync (If he replays the non-encoded stream, he uses 250ms sync
> > > correction). The resulting avi (I think) has 44100 bitrate for sound.
> > >
> > > We both have WinTV Nova-t.
> >
> > Yes, I talked about this earlier today and now confirmed it, Star Wars VI
> > I saved to disk and the re-encoded to divx with mencoder has no lip sync
> > problems. No delay correction applied. The .avi still has 48kHz sound.
> >
> > To be exact, I have to use a correction of -0.255 when playing the mpeg
> > streams with mplayer either "live" or from disk when the video output is
> > via dxr3 and audio output via motherboard integrated sound card.
> >
> > If I use -vo dxr3:noprebuf (instead of just -vo dxr3) the delay is much
> > smaller, almost none. Somehow I have the gut feeling that not using
> > noprebuf is better in general, but it might just be me. Anyway, I've got
> > the no noprebuf delay tuned to perfection so it doesn't matter. ;)
> >
> > 	-jake
> >
> > --
> > Jarkko Santala <jake@iki.fi>            http://www.iki.fi/~jake/
> > System Administrator                    2001:670:83:f08::/64
> >
> >
> >
> > --
> > Info:
> > To unsubscribe send a mail to listar@linuxtv.org with "unsubscribe linux-dvb" as subject.
> >
>
>
>
>

-- 
Jarkko Santala <jake@iki.fi>            http://www.iki.fi/~jake/
System Administrator                    2001:670:83:f08::/64



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