[Openchrome-users] video stutter

[DanC]

Greetings.

I have the following HW/SW configuration and am trying to get MythTV to work with simple TV-out (composite), but there is quite a bit of stutter in the display. From reading the openchrome.org Configuration page, it states:
MythTV  -  Out of the box support. FIXME: Describe the mythtv conf to take advantage of XvMC VLD. 

Can someone enlighten me please?



Mobo: VIA EPIA EX10000EG
VGA:  Integrated VIA UniChrome Pro II 3D/2D AGP graphics with MPEG-2/MPEG-4 and WMV9 Accelerator
TV-out: VT1625M
Installed MythDora-12 (0.24.1)

xorg.conf:

Section "Device"
        Identifier  "Card0"
        Driver      "openchrome"
        Option      "ActiveDevice" "TV"
        Option      "TVType" "NTSC"
        Option      "TVOutput" "Composite"
EndSection
Section "Screen"
        Identifier "Screen0"
        Device     "Card0"
        Monitor    "Monitor0"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Modes    "720x480Fit" "720x480Over"
        EndSubSection
EndSection



Selective data grep'd from Xorg.0.log:

(--) PCI:*(0:1:0:0) 1106:3157:1106:3157 VIA Technologies, Inc. CX700/VX700 [S3 UniChrome Pro] rev 3, Mem @ 0xa0000000/536870912, 0xdd0
00000/16777216, BIOS @ 0x????????/65536
(--) PCI: (0:3:15:0) 14f1:5b7a:0070:7444 Conexant Systems, Inc. CX23418 Single-Chip MPEG-2 Encoder with Integrated Analog Video/Broadc
ast Audio Decoder rev 0, Mem @ 0xd4000000/67108864, BIOS @ 0x????????/65536

...
(II) Loading /usr/lib/xorg/modules/drivers/openchrome_drv.so
(II) Module openchrome: vendor="http://openchrome.org/"
        compiled for 1.7.0, module version = 0.2.904
        Module class: X.Org Video Driver
        ABI class: X.Org Video Driver, version 6.0
(II) OPENCHROME: Driver for VIA Chrome chipsets: CLE266, KM400/KN400,
        K8M800/K8N800, PM800/PM880/CN400, VM800/P4M800Pro/VN800/CN700,
        K8M890/K8N890, P4M900/VN896/CN896, CX700/VX700, P4M890, VX800, VX855

...

CHROME(0): Detected VIA VT3324 (CX700). Card-Ids (1106|3157)

...

(WW) CHROME(0): Manufacturer plainly copied main PCI IDs to subsystem/card IDs.
(WW) CHROME(0): width=640:720, height=480:480, std=1:1, name=640x480:720x480Fit.
(WW) CHROME(0): width=720:720, height=480:480, std=1:1, name=720x480Under:720x480Fit.
(WW) CHROME(0): width=720:720, height=480:480, std=1:1, name=720x480Fit:720x480Fit.
(WW) CHROME(0): width=640:720, height=480:480, std=1:1, name=640x480:720x480Fit.
(WW) CHROME(0): width=720:720, height=480:480, std=1:1, name=720x480Under:720x480Fit.
(WW) CHROME(0): width=720:720, height=480:480, std=1:1, name=720x480Fit:720x480Fit.
(WW) CHROME(0): [XvMC] XvMC is not supported on this chipset.