[linux-dvb] Re: Channel change delay with DVB-T

[Michal Dobrzynski <michal_dobrzynski@mac.com>]

Ahh! There is no such beast as a FF DVB-T card in Australia sorry :P

I haven't used the old DVB driver for a long time now and can't really 
remember how it performed (I hadn't really gotten VDR running well 
enough at that stage).

Does it support the 2.6 kernel?

Regards,
Michal

On 23/04/2004, at 8:33 AM, Juri Haberland wrote:

> Michal Dobrzynski wrote:
> > On 23/04/2004, at 8:07 AM, Juri Haberland wrote:
> > > Prakash K. Cheemplavam wrote:
> > > > Michal Dobrzynski wrote:
> > > > > I asked this on the VDR mailing list and was redirected here.
> > > > >
> > > > > Is there any way to reduce the massive channel change delays? I am
> > > > > running 2 DVB-T budget cards and one Full Featured DVB-S card for
> > > > > output
> > > > > and channel change times are quite disconcerting.
> > > > >
> > > > > Every time my parents change the channel they have to ask what's
> > > > > wrong
> > > > > as the screen stays black for 4 or 5 seconds (last night it even
> > > > > took 7
> > > > > seconds a few times).
> > > > Are you experiencing this with vdr or apps in general? I once had 
> > > > the
> > > > problem with vdr, when I compiled a 1.2.x version on a NPTL enabled
> > > > system. Using a NPTL disabled system, vdr tuned very fast. I haven't
> > > > treid vdr 1.3.x with NPTL, though.
> > > I have such delays also with a DVB-T 1.3 premium card. Switching to
> > > channels on the same frequency as the previous channel is in general
> > > very fast, but switching to another frequency can take up to several
> > > seconds until you get a stable picture.
> > >
> > > This is without NTPL, with Linux kernel 2.4.25, dvb-kernel from
> > > 2004-04-13 and VDR 1.2.6 - so nothing fancy. With DVB driver from the
> > > DVB branch (aka the old driver) switching was a bit slower but
> > > reliable.
> > Well I know that the FF v1.5 (detected as v1.3) card CAN switch faster
> > as I've seen it do it. Tuning speed would only be limited by my DVB-T
> > cards as far as I can understand.
> I'm not talking about a DVB-S ff card - I'm talking about a DVB-T ff
> card here. Switching DVB-T channels is on average faster wit the old 
> DVB
> driver than with the new dvb-kernel driver. Did you try the old one?
>
> Cheers,
> Juri
>
>
>
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