Jerky Video Playback with TV-OUT PAL 625

[OggY68]

Hello, I'm trying for months to get smooth playback using nvidia's tv-out on a classic CRT TV 4:3 but to no avail. Everyting is ok but the video stutters every 3 to 5 seconds even when using 25fps video files. This the case when using mplayer and VLC for playback. Nvidia never accepts custom made modes and modelines even when forcing, see xorg log:

Xorg.1.log

Xorg.conf:

////////////// BEGIN //////////////////
# nvidia-xconfig: X configuration file generated by nvidia-xconfig
# nvidia-xconfig: version 1.0 (buildmeister@builder75) Thu Apr 22 11:44:23 PDT 2010
Section "ServerFlags"
Option "DefaultServerLayout" "Layout0"
Option "Xinerama" "0"
EndSection

Section "ServerLayout"
Identifier "Layout0"
Screen 0 "Screen0" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection

Section "ServerLayout"
Identifier "Layout1"
Screen 0 "Screen1" 0 0
InputDevice "Keyboard0" "CoreKeyboard"
InputDevice "Mouse0" "CorePointer"
EndSection

Section "Files"
EndSection

Section "Module"
Load "dbe"
Load "extmod"
Load "type1"
Load "freetype"
Load "glx"
EndSection

Section "InputDevice"
# generated from default
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "auto"
Option "Device" "/dev/psaux"
Option "Emulate3Buttons" "no"
Option "ZAxisMapping" "4 5"
EndSection

Section "InputDevice"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbRules" "xorg"
Option "XkbModel" "pc104"
Option "XkbLayout" "be"
EndSection

Section "Monitor"
Identifier "Monitor0"
VendorName "Medion"
ModelName "MED MD30422PV"
HorizSync 28.0 - 33.0
VertRefresh 43.0 - 72.0
Option "DPMS"
EndSection

Section "Monitor"
Identifier "Monitor1"
HorizSync 13.0 - 16.0
VertRefresh 50.0 - 60.0
Modeline "720x576pali" 13.88 720 742 808 888 576 580 583 625 -hsync -vsync interlace
Modeline "704x576pali" 13.50 704 722 786 864 576 580 583 625 -hsync -vsync interlace
EndSection

Section "Device"
Identifier "Device0"
Driver "nvidia"
BusID "PCI:5:0:0"
VendorName "NVIDIA Corporation"
BoardName "GeForce 9800 GT"
EndSection

Section "Device"
Identifier "Device1"
Driver "nvidia"
BusID "PCI:5:0:0"
Option "NoLogo"
Option "RenderAccel" "1"
Option "TVOutFormat" "SVIDEO"
Option "TVStandard" "PAL-B"
Option "UseDisplayDevice" "TV"
Option "TVOverScan" "0.2"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Device0"
Monitor "Monitor0"
DefaultDepth 24
Option "AddARGBGLXVisuals" "True"
#Option "XAANoOffscreenPixmaps" "true"
#Option "AllowGLXWithComposite" "true"
Option "TwinView" "0"
Option "metamodes" "1680x1050_60 +0+0; nvidia-auto-select +0+0"
SubSection "Display"
Depth 24
EndSubSection
EndSection

Section "Screen"
Identifier "Screen1"
Device "Device1"
Monitor "Monitor1"
DefaultDepth 24
Option "TwinView" "0"
Option "UseEDID" "FALSE"
Option "ModeValidation" "AllowInterlacedModes"
Option "ModeValidation" "NoPredefinedModes"
Option "ModeValidation" "NoXServerModes"
Option "ModeValidation" "NoEdidModes"
Option "ModeValidation" "NoVesaModes"
Option "ModeValidation" "AllowNon60HzDFPModes"
SubSection "Display"
Viewport 0 0
Depth 24
Modes "720x576pali" "704x576pali"
EndSubSection
EndSection

Section "Extensions"
Option "Composite" "disable"
EndSection
//////////////////////END //////////////////////

Launch Script:

///////////////// BEGIN //////////////////
#!/bin/sh

#exec /usr/bin/xinit /usr/bin/xterm -ut -e \
# /usr/bin/mplayer -stop-xscreensaver -fs -vo sdl "$@" -- /usr/bin/X :1 -layout Layout1

/usr/bin/X :1 -layout Layout1 &
export DISPLAY=:1
xhost localhost
# or modify startx to create 2 magic cookies at startup:
# authdisplay=${display:-:0 :1} <--edit in the :1
# and prepend DISPLAY=:1 to all commands to be run on :1
nvidia-settings -a :1.0/SyncToVBlank=1 &
nvidia-settings -a :1.0/AllowFlipping=1 &
nvidia-settings -a :1.0/XVideoTextureSyncToVBlank=1 &
nvidia-settings -a :1.0/XVideoBlitterSyncToVBlank=1 &
nvidia-settings -a :1.0/XVideoSyncToDisplay=256 &
nvidia-settings -a :1.0/TVOverScan[TV-0]=10 &
#nvidia-settings -q all > ~/Temp/tvout.txt &
sleep 1 &
/usr/bin/mplayer -stop-xscreensaver -fs -vo vdpau -af volume=15:1 "$*"

pkill -f "layout Layout1"

///////////////////END////////////////////////////////

This issue is driving me crazy, any help would be very much appreciated

[OggY68]

Ok, got it, quote from :
http://uk.download.nvidia.com/XFree8...nfigtvout.html

Excerpt:

"Because these TV modes only depend on the TV encoder and the TV standard, TV modes do not go through normal mode validation. The X configuration options HorizSync and VertRefresh are not used for TV mode validation.

Additionally, the NVIDIA driver contains a hardcoded list of mode sizes that it can drive for each combination of TV encoder and TV standard. Therefore, custom modelines in your X configuration file are ignored for TVs."

So the predefined mode that NVIDIA chooses automatically cannot be overridden