[mythtv-users] Need help with HDTV Out Jitter

Steve Frank steve.frank at bevcore.com
Tue Dec 21 19:52:41 UTC 2004

Thanks Doug. That modeline results in little or no change. Are you doing
960X540p out of DVI? It appears that's where the issue is. The N frame
is about 8 pixels above the N+1 frame.  Interlacing and running at 1080i
gets the frames a little closer to each other, but not converged.


-----Original Message-----
From: mythtv-users-bounces at mythtv.org
[mailto:mythtv-users-bounces at mythtv.org] On Behalf Of Doug Larrick
Sent: Monday, December 20, 2004 9:20 AM
To: Discussion about mythtv
Subject: Re: [mythtv-users] Need help with HDTV Out Jitter

Steve Frank wrote:
> Hey gang, I've read Jarod Wilson's guide to HDTV, and currently I'm 
> having a dickens of a time with getting X to agree with some of the 
> settings I'm passing it.
> I'm using FC1 with XFree86 4.0.3-55.  (I'd update, but this puppy is 
> really stable and stability is king for MythTV).  I have a Gigabyte 
> Geforce FX5200 with DVI out, and I'm using a DVI->HDMI interface on a 
> Mitsubishi TV that is capable of 480p and 1080i input on the HDMI 
> interface.  I'm using the Nvidia driver 6629, the latest as of this 
> writing.
> Here's relevant sections from my XF86Config--most of this is verbatim 
> from Jarod's Howto.
> Section "Monitor"
>         Identifier   "Monitor0"
>         VendorName   "Mistubishi"
>         ModelName    "48515 48inch HDTV"
>         Option      "dpms"
>         HorizSync    33.75
>         VertRefresh  59.94
>         Mode "960X540p"
>                 DotClock 37.26
>                 HTimings 960 976 1008 1104
>                 VTimings 540 542 548 563
>                 Flags "+HSync" "+VSync"
>         EndMode
> EndSection


Following is the 540p modeline I use... I believe this to be close to
the ATSC standard, and so might work better for you.  If not, try using
a modeline generator program.

Modeline "540p" 39.956   960 1020 1100 1184    540  550  551 563  +hsync

+vsync # 39.956 MHz 33.75 kHz 59.94 Hz


More information about the mythtv-users mailing list