[linux-dvb] Newbie question

Rudy Zijlstra rudy at edsons.demon.nl
Mon Jan 9 18:53:36 CET 2006



On Mon, 9 Jan 2006, William Smith wrote:

> You'll get pretty much the same quality video with any card.
> It depends on the quality of the stream being sent.
> All the budget cards use a lot of CPU time.

Lets nuance this. They use almost no CPU power for recording, but the CPU 
is used for decoding the MPEG. I am running MythTv with 2 budget cards, 
and during recording of 2 streams at the same time, the processors (dual 
P3 550, are almost idle. Pure overkill for the recording. For MPEG2 
decoding you need about 900MHz CPU power. For H.264 decoding you need the 
strongest CPU you can get.

> If you want to use less,
> then get a card that has an mpeg codec chip on it. They cost about
> 200. Athlon 2000 has more than enough CPU power to view/record streams
> from even a budget card. I have viewed streams from two budget cards at
> one time on a Sempron 2400 albeit one of the video pictures was choppy.
> Just make sure it is supported at linuxtv.org. I am running Kubuntu Breezy and
> it detects both my cards (Technisat Skystar DVB-S and KWorld DVB-T)
> And I can use them in all the DVB supporting programs except Kaffeine,
> where the DVB icon remains dim and unusable.
>
> Good luck.
>
> William
>
>
> On Monday 09 January 2006 00:16, Cristo Saulo Bolaños Trujillo wrote:
>> Hello everyone,
>>
>> I'm thinking about buying a dvb-t card (Avermedia 771 PCI or Haupauge
>> Nova-T), mainly for recording programs from TV, right, the question is:
>> how good is the quality ? and resolution ?
>>
>> Does recording gather much cpu ? I'm running an Ahtlon 2000 XP+ with
>> Ubuntu.
>>
>> Thanks!
>>
>>
>> _______________________________________________
>> linux-dvb mailing list
>> linux-dvb at linuxtv.org
>> http://www.linuxtv.org/cgi-bin/mailman/listinfo/linux-dvb
>
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>
>


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