[vdr] Re: dxr3/vdr problem

[Stefan Schluenss <Stefan.Schluenss@gmx.de>]

Hi guys,

Malcom is using DVB-T if i remember correctly and the currently implemented
DVB-T systems seems to be more in an experimental state than in production
state ;-)

The question is who (driver/vdr/dxr3-plugin) has to take care of corrupt
data ?! In Kai's opinion the data has to be checked and rejected inside the
driver and such corrcupt data should never reach upper layers (the dxr3-plugin).
This is at least defined in the ISO/OSI-network model.
Btw. the DXR3 is by itself very sensitive on corrupt data. It was never
designed to work under such situations because it has normaly only deal with data
from a DVD.

Bis denne
Stefan.

> On 28 Feb 2003 17:47:13 +0930
> Malcolm Caldwell <malcolm.caldwell@ntu.edu.au> wrote:
> 
> 
> Hi Malcolm!
> Can you record from dvb card?
> I use the dvb-kernel from 2003-02-16 and it works great.
> My only problem is the dxr3 card :-(
> When you mean that the satelite signal is too low, how small 
> is your satelite-antenna?
> CU Armin
> 
> > Hello,
> > 
> > I am still unable to get vdr and the dxr3 plugin working reliably here.
> > 
> > I think the problem is due to poor quality signal.  At times the picture
> > starts to break up etc.  When this is bad vdr usually crashes. 
> > Sometimes  the dxr3 locks up and I need to do a reboot.  By locks up I
> > mean that the screen will have random noise frozen on it and sometimes
> > the sound gets stuck making noise.
> > 
> > Often while this is happening I get messages out of vdr:
> > Feb 28 01:21:17 vdr vdr[1378]: ERROR: unknown picture type '7'
> > Feb 28 01:21:18 vdr vdr[1378]: ERROR: error in data stream!
> > Feb 28 01:21:40 vdr vdr[1378]: ERROR: error in data stream!
> > Feb 28 01:21:41 vdr vdr[1378]: ERROR: unknown picture type '5'
> > Feb 28 01:21:50 vdr vdr[1378]: ERROR: unknown picture type '5'
> > Feb 28 01:22:00 vdr vdr[1378]: ERROR: error in data stream!
> > Feb 28 01:22:14 vdr last message repeated 13 times
> > Feb 28 01:22:24 vdr vdr[1379]: ERROR: not sync'ed to TS packet on device
> > 1
> > Feb 28 01:22:24 vdr vdr[1379]: ERROR: skipped 25 bytes to sync on TS
> > packet on device 1
> > Feb 28 01:22:24 vdr vdr[1379]: ERROR: not sync'ed to TS packet on device
> > 1
> > Feb 28 01:22:24 vdr vdr[1379]: ERROR: skipped 163 bytes to sync on TS
> > packet on device 1
> > Feb 28 01:22:33 vdr vdr[1378]: ERROR: error in data stream!
> > 
> > (It is worth noting that my stand-alone receiver has problems during
> > these times.  I have even known it to lock up and/or have its video
> > decoder lock up.)
> > 
> > Now, we are having very bad weather here at the moment, and that could
> > explain the problem, but still, the system (vdr/dxr3) should be more
> > resilient.
> > 
> > Just to give you an idea I have been unable to get vdr to run for more
> > than a few hours.
> > 
> > So, it would seem that the dxr3 plugin is not very resilient to error. 
> > I received an email a while ago from one of the dxr3 plugin authors (Kai
> > Moeller) saying:
> > 
> > > Well, with decoding corrupt pes packets. So actually it is an
> interface 
> > > violation because in my opinion the presentation layer should actually
> not 
> > > care about such problems.
> > > Anyway Teemu Rantanen already reported this and we decided to add his 
> > > workaround to the plugin code.
> > > We are going to release today or tommorrow.
> > 
> > Ki - are you trying to say this is a driver or a vdr issue?
> > 
> > Eitherway, I think the dxr3 plugin should be more resilient.  I am
> > willing to help track down problems etc if its any help (given that my
> > signal is so poor that I will find problem quickly!)
> > 
> > Also, with budget cards - what is the recommended driver?  Perhaps a
> > different driver would help stop errors getting through to vdr? Has
> > anyone tried dvb-kernel with vdr?
> > 
> > 
> > 
> > 
> > -- 
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> > 
> 
> 
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