[linux-dvb] Re: VDR files to VOB

[Jarkko Santala <jake@iki.fi>]

On Thu, 15 Aug 2002, Jeremy Hall wrote:

> Do you have UDMA or DMA turned on? IDE or SCSI? Did you compile the kernel
> with optimizations for athlon?

Its IDE and UDMA level 2 on, but I doubt that the problem is with where I
save it. I get the same problems when saving over NFS too and no problems
saving over NFS with dd in background.

The kernel is compiled for the AMD K6 series of processors, not Athlon aka
K7.

	-jake

> In the new year, Jarkko Santala wrote:
> > 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
> >
>
>

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



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