[mythtv-users] Answers about pcHDTV HD-3000 support in Myth, QAM support, and more

Joseph A. Caputo jcaputo1 at comcast.net
Tue Oct 19 17:54:45 UTC 2004


On Tuesday 19 October 2004 13:33, Cory Papenfuss wrote:
> > Thanks for the FAQ!  One thing I'm still a little unclear on:  on
> > the HD-2000/3000 does the NTSC tuner work as a simple framegrabber
> > (i.e., I must encode in software), or does it produce MPEG encoded
> > output like the PVR-250?  The ATSC stuff is already MPEG as
> > broadcast, right?
> >
> > Tx,
>
>  	The NTSC part is a simple software-based V4L device that uses a
> newer revision of the BT8x8 chipset.  The ATSC is best thought of as
> a 1-way modem... because that's what it is.  It just takes the RF
> signal, downconverts it to baseband, then demodulates it into the
> broadcast MPEG stream and spews it over the PCI bus.

...so, under Myth, does that mean the card would be configured as two 
separate devices?  i.e., /dev/video0 for the ATSC feed, and /dev/video1 
as a standard V4L tuner?  If that's the case, can both be used 
simultaneously?

-JAC


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