[mythtvnz] Hauppauge WinTV PVR-150 [ivtv] not supported in 0.25

[Steve Hodge]

On Fri, Aug 24, 2012 at 10:17 PM, Stephen Worthington <
stephen_agent at jsw.gen.nz> wrote:

> If your CPU is fast enough, it may be able to
> do the MPEG encoding from raw video using an analogue card without a
> hardware MPEG encoder.  But that is a fraught process as the CPU must
> not be switched away from the encoding job for very long or you start
> to lose blocks of frames from the recording.  I think my new
> motherboard could do the job, as it has a 3.2 GHz quad core processor
> and 8 Gibytes of RAM, so it could just dedicate a core to the job. But
> I would want to experiment carefully to make sure that there were no
> lost frames happening.
>

I actually had a bit of chuckle reading that. You're really overestimating
how hard this is. 7 years ago, before I got my PVR-150, I used raw capture
cards. I was able to simultaneously record and playback with a AMD Sempron
2400+. That's a single core 1.7 GHz budget processor. No testing necessary
beyond looking at top to verify that the CPU was not maxing out. With a
second capture card I was able to record 2 channels and playback one,
though I did have to reduce the capture resolution (PAL resolution is
theoretically 720 or 704 x 576 interlaced but the broadcast signal only
manages about 500 pixels horizontally).

PVR-150s have always been recommended for Myth because they are easy but
they don't allow for much tuning of the encoder's parameters. Software
encoding is actually capable of better quality.

Cheers,
Steve
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.ourshack.com/pipermail/mythtvnz/attachments/20120825/200dbcd3/attachment-0001.html>