[mythtv-users] HDTV on Myth -- is it a "myth?"

Art Morales bioart at gmail.com
Sun Oct 10 00:44:06 UTC 2004

I sorta have it running... I have a master be with 2 pvr 250s and one
slave be with 1 pchdtv.  The pchdtv is a little flaky (playing 720p)
with a 2.6 ghz p4.  It's not bad, it actually looks good, but it does
crash a lot.  I don't know yet while it crashes, but I'm working on
it...  Should we have a dedicated HDTV with myth support group? :)

I haven't seen any new patches on the pchdtv since the inkling ones,
so I believe I'm running latest and greatest (no XVMC).


On Sat, 9 Oct 2004 12:29:43 -0700 (PDT), Joe Barnhart
<joebarnhart at yahoo.com> wrote:
> I guess my expectations were too high.  I've been
> watching HD on my combo satellite/terrestrial receiver
> a couple of years now, and I expected Myth to be able
> to record and play signals equivalent to what I see on
> "normal" HDTV (terrestrial) broadcasts.  What I
> actually get on Myth is slow, jerky, stuttering
> playback that often hangs the frontend with something
> as simple as skipping forward or backward, or any
> activity that pops up the on-screen display.
> When I am able to get streams to play, the video is
> marred by scaling artifacts and weird interactions
> between interlaced and non-interlaced video streams.
> For instance, a 1080i source played on a 1080i output
> device shows horrible jaggies.
> (http://www.pbase.com/jbarnhart/image/34300421.jpg)
> The same stream played through the "bob" deinterlacer
> looks better (but still not up to the level of the
> receiver).
> I tried to build a system able to handle this task,
> with an Athlon 2800+ processor and a GeForce4 MX video
> card, but the system is unable to cope with my
> 1920x1080i output device.  The Xv software player is
> unable to keep up with task of decoding MPEG at this
> rate, and XvMC simply doesn't work reliably enough to
> watch an entire show without hanging mythfrontend.
> Were my expectations too high?  Is this a matter of
> "rough edges" soon to be smoothed out?  Or is the
> current state of Myth unable to handle HDTV (at
> 1920x1080i) for anyone?  Should I dump my system and
> buy new Intel Pentium hardware?  Or just go back to
> the combo receiver and wait another year for the
> software to catch up?
> I would love to hear from anyone who is playing
> streams at 1920x1080i with no stutters or poor video
> quality.  What kind of system are you using?  Xv or
> XvMC?  Intel or AMD?  Video card?
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