linpvr at projectplasma
Feb 15, 2003, 8:51 AM
Post #3 of 4
(1087 views)
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On Sat, 15 Feb 2003, Glen Harris wrote:
> This is a re-send, as I sent from the wrong address
> initially.
Ok, I dropped that one :)
> I've been reading all the docs I can find, but I'm not
> sure which are current and which have been invalidated by
> new work. Since the SF about.html page is not yet there,
> I'm posting my questions here - perhaps they could kick
> of a FAQ page.
Sorry, big project at my paying job.
> 1. Is the tuner supported or is it to be supported in the
> future?
Are you really asking if the card can be used as a straight tuner card without
the compression engine?
The PVR-PCI uses the Conexant 878a to manage the PCI interface and perform
overlay functions and the kfir chip to do the compression engine stuff.
IIRC, as of kernel 2.4.20, the in kernel bttv module can use the PVR-PCI as a
straight tuner card (but no compression).
While I think the iTVC15 chip can provide a raw feed for those projects that
absolutely need one (gnomemeeting for instance), unlike the PVR-PCI, the
PVR-x50 series uses only that chip to manage everything. So you need a driver
for it either way.
> 2. I've heard that there's a new revision of the card
> using a cheaper encode-only MPEG chip, are both supported
> or will the new one be supported later?
Yes, the CX23416 (nee iTVC16) design is the one that's currently shipping on
the 250. I was hoping that Hauppauge would have changed the product number
when they did that. I have Windows driver code that states "now compatible
with the iTVC16", so there's probably some differences.
So the bad news is that there are differences, the good news (I hope) is that
the two parts are close enough that supporting the '16 based parts should be
easy enough if we can get the information on the changes necessary.
> 3. How do I tell the difference when I'm buying my card,
> given that the nearest supplier is over 2000km away.
I hate to say it, but I don't know.
> 4. Can a PVR-x50 co-exist with a standard TV card, and
> can both be used concurrently?
Shouldn't be a problem. Somebody on http://www.shspvr.com/forum/ got four
PVR-250's running concurrently under Windows. The only thing you need to
worry about is the chipset your motherboard is running. Older VIA sets have
issues with PCI bus-masters.
> Q2 and 3 are the most important, as I really don't want
> to buy a card which is not supported, as the chances of
> returning it are really, really low. For a $430 card, I
> *might* be able to get them to open the box and look at
> the chip to make the sale, but then again, I might not.
Oh, that's easy then. The older 250 has a heat-sink (which really should be a
fan). The newer one runs quite a bit cooler an doesn't. Another difference
is that the older design has two memory chips and the new one has only one.
If I can get my hands on a '16 based board I'll see what I can do to get it
working. If anybody has one now, if I get the chance, I'll try to come up
with a patch (or info delta so that Kevin can make the patch :) that we can
try out.
That said, there are other '15 based cards on the market but they're not easy
to find. Typically they're used in security monitoring applications. Google
for "itvc15" or "cx23415".
And we're still not quite stable, so perhaps you may want to sit on it for a
month or two.
> Thanks heaps,
> glen.
John
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