[vdr] HDTV w/ FF card

gfiala at s.netic.de gfiala at s.netic.de
Thu Apr 21 09:19:15 CEST 2005


Zitat von Christian Schuld <chris at sonnengesicht.de>: 
 
> Carsten Koch wrote: 
> > Klaus Schmidinger wrote: 
> > > Carsten Koch wrote: 
> > >> Matthias Schwarzott wrote: 
> > >>> Or another posibility to get HDTV. How about marking a channel not be 
> > >>> displayable with ff-card and then showing only a black screen if such 
> > >>> a channel is detected. 
> > >> 
> > >> I would like that much better than a crash.  :-) 
> > >> 
> > >> The current behaviour (HDTV channels get into channels.conf 
> > >> automatically, 
> > >> if you happen to zap to such a channel innocently, the driver crashes) 
> > >> is not very user-friendly. 
> > > 
> > > The main question is: how do you detect a "HDTV channel" just from the 
> > > SI data? 
> > 
> > I do not know. 
> > But the femon plugin is able to display the resolution of the current 
> > stream, so that information is obviously available to vdr. 
> > Would it not be possible to show a black screen and some OSD message 
> > whenever the resolution of the current stream is > 720x576? 
>  
> The femon plugin gets this information directly from the video elementary  
> stream. So the problem remains to get that high bandwidth stream from the  
> FF-card. May be a solution would be to request a single PES paket with the  
> PES_OTHER flag instead of PES_VIDEO so that it won't get routed through mpeg 
>  
> decoder. This would slow down the tuning process though. 
 
Instead: 
How's the chance the firmware is being fixed not to crash but to gracefully 
ignore data it can't handle? Some configurable plausibility checks on header 
data would certainly do (This would obviously also help on the subject off ARM 
crashes upon loss of signal or garbage received) 



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