[mythtv-users] PVR-250 480x480 jitter in hardware encode
Bryan Ware
bryan at hb-computers.com
Tue Apr 13 19:27:41 EDT 2004
Okay,
I change my video setting to 720x480 and it seems to have solved the
Flicker problem. It has been running now for an hour and hasn't done it.
I will let you all know in a week or so after I record some show.
Thanks for everyones help!
Bryan
On Tue, 2004-04-13 at 16:47, Boyd II, Willy wrote:
> >-----Original Message-----
> >From: mythtv-users-bounces at mythtv.org
> >[mailto:mythtv-users-bounces at mythtv.org]
> >Sent: Tuesday, April 13, 2004 3:27 PM
> >To: Discussion about mythtv
> >Subject: Re: [mythtv-users] PVR-250 480x480 jitter in hardware encode
> >
> >
> >I am considering switching from BT848 card to pvr-250 at some
> >point. all this talk of unstable systems, flickering frames,
> >2x playback make me think I should stay put. So I put forth
> >the following questions:
> >
> >1) Has anyone run a pvr-250 flawlessly at 480x480 capture? At
> >other "high res" settings? With high system stability (longer
> >than 3 months between reboots)?
>
> Can't say on the "3 months" requirement, as I recently rebuilt my box,
> and I didn't have it constantly up for 3 months before that because it
> was just too damn loud. The only stability issues I've see however, are
> the frontend locking up, usually when I'm aggressive with FFW'ing
> through commercials. I'm still experimenting with filters and playback
> options to nail that one down, though. But that doesn't require a
> reboot, so I'll say "yes" to the flawless question ;-)
>
> >
> >2) Does PVR-250 work flawlessly at VCD resolution all the time?
>
> Haven't run it long at 352x240, if that's what you mean. I used to do
> 480x480 and now do CVD, 352x480, and both were 'flawless'.
>
> >
> >Thanks!
> >
> >Rob
> >
> >----- Original Message -----
> >From: "Mikhail D'Vane" <mikhaildvane at hotmail.com>
> >To: <mythtv-users at mythtv.org>
> >Sent: Tuesday, April 13, 2004 10:50 AM
> >Subject: RE: [mythtv-users] PVR-250 480x480 jitter in hardware encode
> >
> >
> >> The only comfort I can offer you is the assurance that you're not
> >> alone in
> >> having
> >> this problem. I have the exact same issue and I have come
> >across at least
> >> one
> >> other post by someone who had the problem and did the same
> >experiment you
> >> did with the same results.
> >>
> >> I have not done as much experimenting, but what I do know is that the
> >> version
> >> of ivtv driver makes a difference. Currently, I'm running
> >0.1.9 and I see
> >> the out-of-
> >> place frame at about the same rate you do. If I downgrade
> >ivtv to 0.1.7,
> >> the
> >> out-of-place frame is gone, but my system stability suffers (daily
> >> hang/reboot
> >> required). If I upgrade to ivtv 0.1.10pre2, the video plays
> >at about 2x the
> >> normal speed, but the audio is fine (so... it's unwatchable).
> >>
> >> I'm just holding out for the next release of the ivtv driver. It
> >> seems like
> >> the
> >> speed problem is being addressed (some posts to thie effect
> >on the ivtv
> >> mailing
> >> list).
> >>
> >> I'll have to try capture in something other than 480x480, since I
> >> transcode
> >> any
> >> mpegs I want to burn to DVD, anyway (not enough CPU to play 720x480,
> >> stutter-free in my frontend).
> >>
> >> Mik
> >>
> >> >From: john lawler <maillist at tgice.com>
> >> >Reply-To: Discussion about mythtv <mythtv-users at mythtv.org>
> >> >To: Discussion about mythtv <mythtv-users at mythtv.org>
> >> >Subject: [mythtv-users] PVR-250 480x480 jitter in hardware encode
> >> >Date: Tue, 13 Apr 2004 11:34:48 -0500
> >> >
> >> >Hi guys,
> >> >
> >> >This has been a nagging problem for me ever since I got my
> >box setup
> >> >a
> >> >couple of months ago, but I'd forgotten about it ever since
> >I switched most
> >> >of my recordings to VCD (MPEG-1 352x240) mode. However,
> >now I want to
> >> >record some shows and transfer them to SVCD, so I need to
> >capture at the
> >> >default 480x480 resolution and use nuvexport for it.
> >> >
> >> >However, here's the problem. I followed Jarod's guide almost
> >> >verbatim (a
> >> >few unimportant divergences), which means I have all the
> >ivtv versions
> >> >(including firmware) that he suggested and all of that,
> >though I haven't
> >> >done any special tweaking of that driver or anything.
> >> >
> >> >Whenever I record something in 480x480, at various points during
> >> >playback,
> >> >I get this annoying tearing or jitter in the video, where a
> >couple of
> >> >frames tend to slide out of the picture, or something, and
> >then it'll go
> >> >back fine for several seconds or even a few minutes and
> >then come back.
> >> >
> >> >I've exported the shows using nuvexport to SVCD and played them in
> >> >Winamp
> >> >on a windows machine and I get the exact same jitter in the
> >exact same
> >> >points--this conclusively proves that the problem is not in
> >playback on the
> >> >myth box. Thus, it must be entirely in the capture, which
> >narrows things a
> >> >bit.
> >> >
> >> >I've already googled and searched the mailing list, of
> >course, and I
> >> >hear
> >> >murmurs about somewhat similar issues, but nothing that
> >sounds exactly the
> >> >same.
> >> >
> >> >I also don't have any problem with the sound sync or anything else,
> >> >it's
> >> >just those frames flickering from time to time.
> >> >
> >> >So... anyone else have a similar experience? Preferably with a
> >> >rock-solid
> >> >resolution? I figure it probably has something to do with
> >either ivtv
> >> >having a slight bug in it or my configuration of ivtv.
> >> >
> >> >Thanks a bunch guys, mythtv rocks!
> >> >
> >> >jl
> >> >
> >> >=====
> >> > hardware specs (for reference and posting)
> >> >=====
> >> > Chaintech 7NIF2 mobo (get the exact BIOS date, think
> >it's 9/xx/2003)
> >> > on board nvidia nforce2 video (w/ shared system memory) + TVout
> >> > + audio + net (all on board)
> >> > Athlon-XP 2400+
> >> > 512MB PC2700 Crucial RAM
> >> > Hauppauge PVR 250
> >> > Western Digital 60GB hd 7200rpm
> >> >
> >> >=====
> >> > software specs
> >> >=====
> >> > essentially identical to Jarod's guide as of about mid-March
> >> >2004. _______________________________________________
> >> >mythtv-users mailing list
> >> >mythtv-users at mythtv.org
> >> >http://mythtv.org/cgi-bin/mailman/listinfo/mythtv-users
> >>
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