[mythtv-users] MoBo+PVR150 or 350?

Ryszard ryszard99 at gmail.com
Tue Dec 7 09:44:15 UTC 2004

hi darren,

there are a couple of us out there who dont have exception tv out
quality from the 350.  i think we're a PAL group.  are you able to
dump the registers from your 350 for us to have a look at? i believe
teh command is ivtv -r


On Mon, 06 Dec 2004 11:41:22 -0800, Darren Hart <darren at dvhart.com> wrote:
> On Tue, 2004-11-23 at 15:51 -0500, Fred Squires wrote:
> > > But my question is what does it mean that everything comes through a
> > > framebuffer - is that actually inferior quality or simply more processind
> > > needed?
> >
> > The framebuffer is basically just what it sounds like, a buffer (some
> > memory) where X can draw the video (or frames).  The reason why it's
> > not as good is not  because it's a framebuffer but because the pvr 350
> > doesn't do any video processing itself (except for mpeg2) so all
> > processing must be done by the cpu.  This is different from most
> > regular video cards (like the nvidia cards) where some of the video
> > processing can be offloaded to the card.
> I currently use the PVR-350 and am very happy with the quality of
> recorded video playback.  The pvr-350 has outstanding tv-out quality -
> but you can only really use it for playing videos it recorded or
> non-demanding graphics (like the myth tv ui).
> It isn't good for playing DVDs or VCDs or any other kind of video, and
> you certainly wouldn't want to use it for mame or other games.  Once the
> ivtv guys get direct yuv support working, the other video types should
> play fine as well, but I doubt games will ever work well on it.  Also
> note that the alpha channel of the png icons in mythtv aren't fully
> supported on the pvr-350 output.  Rather than varying levels of
> transparency, you only get transparent and opaque - so you just have to
> pick a theme that looks good in that mode and you'll be fine.
> As far as using a video card and a pvr-350, I have an nvidia card with
> svideo out going to VCR1 on my receiver and the pvr-350 goes to
> DTV/CABLE.  So I can watch the boot logs and use the console if the ssh
> isn't working if I need to - but I *almost* never use it.  AFAIK you
> need to have the svideo connected at boot for the nvidia cards to use
> the tv-out - so having them both plugged into the receiver satisfies
> that requirement.
> Good luck.
> >
> >
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> --
> Darren Hart <darren at dvhart.com>
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