[mythtv] DVB Stability problems with watching live TV

Ben de Luca (bedel) bend at bedel.mine.nu
Mon Aug 9 07:03:42 EDT 2004

Hi guys,
	I am in Australia (sydney) too and notice similar things.

Some things to note, from what I have found out and tried, I have two 
visionplus cards running in my machine.

1. DVB signal strength is usually really low here. I have LOS to the 
towers with nothing in between, compared to people with same hardware 
OS I have very low value.
2. I set the pci latency lower on other devices, and found some 
improvement some thing is wrong with DMA but I cant find it yet. the 
are cheap cards but hey? I got what i paid for.
3. Kenneth Aafloy submited a patch that got rid of my most constant 
crash (once per day) with a patch a few weeks ago.

On 09/08/2004, at 8:28 PM, Tim Ansell wrote:

> On Mon, 2004-08-09 at 18:42, Damian Ivereigh wrote:
>> Hi guys,
>> Has anyone else experienced stability/crashing problems when watching
>> Live-TV with DVB cards?
>> I have been using mythtv with a couple of Australian Nova-T DVB cards
>> for the last few months. The recording and playback works great, rock
>> solid.
> I'm here in Australia too!
>> However I have found a couple of wierd problems when watching live 
>> TV:-
>> 1) When switching channels, sometimes the player never gets up to 
>> speed,
>> staying at that slow speed it uses when trying to get the video and
>> audio in sync.
> I have experienced this problem. It only ever seems to happen on 
> Channel
> 7. I'm in Adelaide, South Australia and am using a Vision Plus card.
>> 2) When the signal quality is a bit flaky (and the card temporarily
>> loses sync), I have seen both the front and backend crash (at 
>> different
>> times). I realise that the solution is to fix the signal quality, but 
>> I
>> would prefer myth to handle this situation a bit better.
> I have also experienced this problem. Sadly it seems signal quality is
> kinda lacking here in Australia, which is the whole reason I went
> digital instead of Analog.
>> I am not looking for a fix (unless someone has one), rather to know if
>> anyone else has experienced it. If so I will have a go at debugging 
>> and
>> fixing it.
>> One simple change I would like to make is make the timeouts *much*
>> shorter. Right now if you unplug the aerial, mythtv hangs for almost a
>> minute. Frankly if you can't get sync in 5 secs, you may as well give
>> up. What would be great would be an error message and allow you to
>> change to a new channel.
>> Comments?
>> Damian
> -- 
> Tim Ansell <mithro at mithis.net>
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