I used a 1Ghz PIII w/ a bt878 card for awhile as a backend/frontend system.   Using a resolution of something like 480x372 and RTJPEG, I was able to play/pause live TV without any stuttering. 

I ended up using the PIII exclusively as a backend, though, and using a PII 450Mhz as a front end.  With that setup I was able to record and playback 640x480 RTJPEG. 

That said, the picture quality with the bt878 card was crap.  I recently purchased a PVR-150 and was delighted with the picture quality during the 3 hours that it actually worked.  The downside, of course, is that I haven't been able to get it to work reliably.

So, my advice, depending on cash/time at hand would be:
  
ample cash/no time:  Get a PVR-350, easily the most supported card in the MythTV community.

ample time/short cash:  Get a PVR-150 and figure out how to get it working.

little time or cash:  Find an old sub $100 computer on eBAy or your local classifieds to use as a frontend.

just plain broke: Record at 320x240 and pretend you have the world's biggest iPod.

On 11/2/05, Michael T. Dean < [EMAIL PROTECTED]> wrote:
On 11/02/05 18:32, Todd Houle wrote:

> I have been raving about MythTV to a friend of mine who finally
> decided to try it himself.  He had an old PC (1GHz Dell GX150) and 2
> old tuner cards (avermedia and hauppauge win-Tv).  I don't know the
> details of the cards other than they both use the bt878 chips.
>
> We installed KnoppMyth as that is what he heard about elsewhere.
> KnoppMyth detected everything perfectly and ran great.  I added the
> cards in Myth-setup, but we couldn't use it happily.  There was a 1
> second pause, for every second of live tv...  I guess these cards
> don't have hardware MPEG encoders on them and the computer couldn't
> handle the load..  I lowered the quality way down, but still couldn't
> get a smooth playback..
>
> I told him to get a better computer, or a TV card that supports
> hardware encoding.  Was I right?  or was there something else I could
> have done?

Yep.  Although you might be able to make something work with RTJPEG (at
least for a single tuner), it's not worth the effort and the
compromises, IMHO.  And make sure he has Xv support for the video card
(probably won't be an issue with a newer system, but might be with the
old one).

Mike
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