AW: [mythtv-users] Hardware for Best TV-Out?
joevph at yahoo.com
Tue Oct 26 06:20:09 UTC 2004
With such a converter, are you able to pass what I
call the "CNN test"? That is, tune to CNN (or some
other channel with a scrolling ticker), and the ticker
is completely jitter free (as on a real TV)?
Also, what kind of settings do you use for X? Do you
run at a "standard" mode of 640x480 or 800x600. or do
you have to run at a different mode that might not
play nicely with the MythTV GUI (for example on the
PVR-350 output, which is 720x480, the GUI has to be
resized, and overscan applied to the OSD, which has
it's own set of problems).
--- Cory Papenfuss <papenfuss at juneau.me.vt.edu> wrote:
> > Iīm currently using a gf4mx with a selfmade
> vga2rgb converter
> > (http://www.nexusuk.org/projects/vga2scart/) which
> is giving me uber-superb
> > quality on the frontend and good quality @watching
> recordings. Iīm still
> > investigating the cause for the notīso sharpenes
> off my recordings/livetv.
> I "discovered" that when I got my equivalent NTSC
> circuit built.
> I built up some test patters and convinced myself
> that the PVR-250 itself
> was limiting the capture resolution to about 520x480
> maximum. Anything
> over that produced no better resolution on even a
> static image. I know it
> wasn't the TVOUT because of trying the test patterns
> directly (720x480 and
> 1440x480). Here's the beta-quality DVD image I came
> up with at the time:
> Be warned though, I've never actually tried the
> PAL stuff on
> anything... just changed the resolution of some
> pictures and re-authored
> the images.
> > It seems to me that there ainīt no interlaced
> output if I watch
> > tv/recordings, although I donīt get as heavy
> stuttering on the cnnticker as
> > I had on svideo out of the card. Iīll try to throw
> some official
> > testpatterns on it via mpeg and mythgallery maybe
> I can then clearly
> > describe the problem.
> I ended up adding deinterlacing to my recordings
> because I would
> get some strange beat frequency/vsync-related
> tearing without it. I'm
> currently using KernelDeint and have been quite
> satisfied. Bob deint is a
> bit much for the PIII-800 hardware.
> > Maybe anyone can help me here as I clearly have
> interlaced output on the
> > frontend. Whats the difference between frontend
> output and watchingtv -
> > output? It even seems to look better in the video
> epg. XV, OpenGL vsync
> > should I try to compile without one/both of these
> (I think I wonßt get any
> > reasonable output on my p3-700 without xv)?
> > I have no deinterlace or any other filters
> activated, playback is full pal
> > resolution 720x576 my x resolution thats put on
> my tv is 768x576 (shouldīt
> > that be right due to square/non square pixel
> issues?). So can anyone
> > describe me the difference between frontend and
> movie-watching please?
> > Thanks
> > Flo
> It depends on what you mean by "better." If you
> are talking about
> vertical tearing on recordings, I solved that with
> the deint. The
> softness of the capture I traced to the PVR-250
> itself. If it's any
> consolation, the three BTTV-based cards I've tried
> have all crapped out at
> about 400x480, max. Anything over that takes space
> but doesn't help
> pictures quality.
> Hope that helps... see if you can quantify your
> quality problems.
> mythtv-users mailing list
> mythtv-users at mythtv.org
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