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

[Michal Dobrzynski <michal_dobrzynski@mac.com>]

Frankly I'd be overjoyed if I only had to wait 3 seconds at channel 
change :/ I timed it with a stopwatch and it takes at LEAST 5 seconds 
and sometimes even 8 seconds.

I'm sure it wasn't always this slow :/ (ie when I first started 
dabbling). And it sure as hell was never this slow under Windows back 
when I tried it.

On 23/04/2004, at 4:38 PM, Adrian P Challinor wrote:

> I understand the concerns here, but this delay also happens on 
> commercial
> TV's. I have a fairly expensive Phillips TV with built in DVB-T 
> receiver,
> and it takes at least three seconds to switch between digital channels.
> Analogue is instant.
>
> Is this something to do with DVB-T encoding?
>
>
>
> > -----Original Message-----
> > From: linux-dvb-bounce@linuxtv.org
> > [mailto:linux-dvb-bounce@linuxtv.org]
> > On Behalf Of Juri Haberland
> > Sent: Thursday, April 22, 2004 11:08 PM
> > To: linux-dvb@linuxtv.org
> > Subject: [linux-dvb] Re: Channel change delay with DVB-T
> >
> > Prakash K. Cheemplavam wrote:
> > > Michal Dobrzynski wrote:
> > > > Hi,
> > > >
> > > > 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.
> >
> > Cheers,
> > Juri
> >
> >
> >
> > --
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> > linux- dvb" as subject.
>
>
> --
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