[Fwd: Re: [mythtv-users] DVB-S support and mythtv]

[Barry Davis]

I'm thinking about making a machine up as well. I've got a lot of 
experience with Linux (its my job) so I don't mind getting my hands 
dirty with some experimental code.
What is support like for digital TV in Linux? Is it just the satalite 
cards that are supported (WinTV Nexus-s and Nova) or are the Terrestrial 
cards supported as well (WinTV Nova-t PCI)? Or even USB versions (WinTV 
Nova-t USB and DEC 2000-t).
I'm particularly interested in the DEC2000-t as it can be used without a 
computer.

Why does the video stream need prefiltering? What does this entail? 
Don't these cards feed out an MPEG2 stream?

Barry.


Ben Bucksch wrote:

> jbeuree at rogers.com wrote:
>
>> Would the issue around cards not being able to prefilter cause a 
>> significantly larger load on the PCI bus?
>>
> I don't think that PCI is an issue, I think we have a TS of maybe 
> 16Mbit/s or something in that area. I was more concerned about RAM 
> bandwidth. But I don't think that's going to be a problem either. It's 
> not *that* much of data to process.
>
> If anybody has more concrete data about the size of transport streams 
> and the load that PID filtering and TS->PS conversion brings per card, 
> I'd like to know it.
>
> In any case, I think the code should work with both types of card. But 
> I don't know, I'll need to test it.
>
>> I'd eventually like to have a machine with a couple of these cards 
>> (and maybe even keep a cable tuner in it also).
>>
> me too. Note that they are limited to 4 per machine, I think.
>
>> But if this would prevent this setup I may be better off getting a 
>> better card.
>>
> I will personally go with 2 Nova cards and maybe keeping the analog 
> card for backup.
>
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