[mythtv-users] PVR-250 480x480 jitter in hardware encode

[Bryan Ware]

I would second that, I am going to play with the ioctl settings when i
get home. If I find a combo that works, i will let everyone know.

Bryan
On Tue, 2004-04-13 at 13:57, Kevin Russell wrote:
> I sure hope this gets resolved as it is the only thing keeping myth from
> being great on my machine.  It works now - but it by no means comes
> close to what it should look like.
> 
> -----Original Message-----
> From: mythtv-users-bounces at mythtv.org
> [mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Bryan Ware
> Sent: Tuesday, April 13, 2004 11:56 AM
> To: Discussion about mythtv
> Subject: Re: [mythtv-users] PVR-250 480x480 jitter in hardware encode
> 
> 
> I believe that you just described my issue to a tee, but unfortunately,
> i have had no luck getting an answer from here or IVTV's mailing list.
> It is how ever, a work in progress, So I am contributing it to driver
> development and am hoping it gets cured with the next IVTV driver
> revision.
> 
> Bryan
> On Tue, 2004-04-13 at 12:34, john lawler wrote:
> > 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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