[mythtv-users] tuning two-card systems ?
Michael J. Lynch
mlynch at gcom.com
Tue Oct 19 14:53:50 UTC 2004
Adam Felson wrote:
>>Hi,
>>
>>
>
>
>
>>I just managed to build my two-card (bttv cards!) system. It works
>>fine I guess, when recording two channels it is 0% idle, but still
>>everything appears to get to disk just fine for now. I've seen no
>>jerking or hiccups or artifacts. More on that setup below. First my
>>problem...:
>>
>>
>You're still misreading your cpu useage. There's *absolutely* no way
>you're running two cards with no cpu useage. Impossible. Absolutely.
>When I ran two cards on an Athlon XP 3000, I typically got 30% useage
>for the card processes alone and another 25% per transcode process. If
>I did mpeg4 encoding in real time, I got 30%/card.
>Nowadays I'm running two pvr-250s an one bttv (bt878) card.
>
>
>
He said 0% IDLE not 100% idle. Anyway, it's hard to believe that he's
not getting
any jerking, hiccups, or artifacts when there is no CPU time left.
>
>
>
>>I notice that my two bttv cards are not what you'd call exactly in
>>sync, where the tuners are concerned. If one card gives good picture,
>>the other is just slightly off-channel so the colors are too
>>pronounced, or I get stripes and other interference. Now what I wonder
>>is this, can one finetune channels per-card, or is the channel
>>frequency globally defined for all cards ?
>>
>>
>
>I've never had color problems. Perhaps you have a defective card or are
>running an old version of video4linux.
>
>You shouldn't need per/card finetuning as they're receiving the same
>signal. Spend the $35 and replace the defective card.
>
>
>
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--
Michael J. Lynch
What if the hokey pokey IS what it's all about -- author unknown
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