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Old 09-18-06, 11:52 AM   #1
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Join Date: Sep 2006
Posts: 4
Question Interlaced modes - Need some help

I'm hoping someone will take a minute and help me get my last peice working....I've read and read and just can't seem to get my myth output to look right when using interlaced modes. Deinterlacing looks much better but introduces artifacts, my sets native input is 1080i and when I use that any movement like panning etc, I get bad combing effect like it's a progressive display and not a interlaced set. I'm so close but not sure where to go, I'm using an nvidia 6150 based motherboard FC5 86x64 with the proprietary drivers but not using xvmc, but can't get interlaced mode to look right. I'm using the vga input of my pioneer RPTV SD-533HD5 and trying interlaced modelines but its like its not realing doing interlaced, any panning of the camera produces bad combing like effects or striping) my pioneer takes 1080i native and that is what I am trying to feed it. I'm primarily using the "1920x1080i" modeline which works except for the comb effect on movement using the 8774 drivers. I can attach any outputs that anyone might want I'll go ahead and attach my xorg.conf and maybe something is obvious. Thanks...


# XFree86 4 configuration created by pyxf86config

Section "ServerLayout"
Identifier "Default Layout"
Screen 0 "Screen0" 0 0
InputDevice "Mouse0" "CorePointer"
InputDevice "Keyboard0" "CoreKeyboard"

Section "Files"

# Multiple FontPath entries are allowed (they are concatenated together)
# By default, a font server independent of the X server is
# used to render fonts.
ModulePath "/usr/lib64/xorg/modules/extensions/nvidia"
ModulePath "/usr/lib64/xorg/modules"
FontPath "unix/:7100"

Section "Module"
Load "dbe"
Load "extmod"
Load "fbdevhw"
Load "record"
Load "freetype"
Load "type1"
Load "glx"
Load "v4l"

Section "InputDevice"

# Specify which keyboard LEDs can be user-controlled (eg, with xset(1))
# Option "Xleds" "1 2 3"
# To disable the XKEYBOARD extension, uncomment XkbDisable.
# Option "XkbDisable"
# To customise the XKB settings to suit your keyboard, modify the
# lines below (which are the defaults). For example, for a non-U.S.
# keyboard, you will probably want to use:
# Option "XkbModel" "pc102"
# If you have a US Microsoft Natural keyboard, you can use:
# Option "XkbModel" "microsoft"
# Then to change the language, change the Layout setting.
# For example, a german layout can be obtained with:
# Option "XkbLayout" "de"
# or:
# Option "XkbLayout" "de"
# Option "XkbVariant" "nodeadkeys"
# If you'd like to switch the positions of your capslock and
# control keys, use:
# Option "XkbOptions" "ctrl:swapcaps"
# Or if you just want both to be control, use:
# Option "XkbOptions" "ctrl:nocaps"
Identifier "Keyboard0"
Driver "kbd"
Option "XkbModel" "pc105"
Option "XkbLayout" "us"

Section "InputDevice"
Identifier "Mouse0"
Driver "mouse"
Option "Protocol" "IMPS/2"
Option "Device" "/dev/input/mice"
Option "ZAxisMapping" "4 5"
Option "Emulate3Buttons" "yes"

Section "Monitor"

### Comment all HorizSync and VertSync values to use DDC:
Identifier "Monitor0"
VendorName "Monitor Vendor"
ModelName "PHILIPS 107S"
### Comment all HorizSync and VertSync values to use DDC:
HorizSync 31.5 - 37.9
VertRefresh 59.9 - 60.1
ModeLine "856x480" 35.1 856 909 981 1096 480 495 501 539 -hsync -vsync
ModeLine "1776x1000i" 74.2 1776 1899 1939 2200 1000 1036 1046 1125 +hsync +vsync interlace
ModeLine "1920x1080i" 74.2 1920 1960 2016 2200 1080 1082 1088 1125 +hsync +vsync interlace
ModeLine "960x540p" 37.1 960 980 1008 1100 540 541 544 562 -hsync -vsync
Option "dpms"
Option "HWCursor" "off"

Section "Device"
Identifier "Videocard0"
Driver "nvidia"
VendorName "Videocard vendor"
BoardName "nVidia Corporation C51 PCI Express Bridge"

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Monitor "Monitor0"
DefaultDepth 24
SubSection "Display"
Viewport 0 0
Depth 24
Modes "856x480" "1776x1000i" "1920x1080i" "960x540p"

Section "DRI"
Group 0
Mode 0666
bishoptf is offline   Reply With Quote
Old 09-18-06, 03:48 PM   #2
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Join Date: Aug 2003
Posts: 1,026
Default Re: Interlaced modes - Need some help

I think you are expecting too much.
It is possible to set the driver to interlaced output, and that is what you have already done.
However, that does not necessarily mean that interlaced material you feed into xvmc remains interlaced all the way.
I think the player will take to successive fields, decode them and store them in a single frame, which the videocard will then again output as two successive fields (when you use an interlaced mode).
But, there is no guarantee that these fields correspond to the originals, and when there are filtering operations going on they definately will not.

Using a computer for true, undisturbed video playback remains difficult (especially under Linux).
You can get rid of the combing effect when you apply the proper de-interlacing filters, but there will again be problems once you feed out the result over interlaced video to the HD tv.
pe1chl is offline   Reply With Quote
Old 09-19-06, 01:31 AM   #3
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Join Date: Aug 2006
Posts: 33
Default Re: Interlaced modes - Need some help

It appears you are having similar issues to my posting http://www.nvnews.net/vbulletin/showthread.php?t=76819. I'm not happy with the general video playback quality because the card appears to be doing the wrong sort of smarts with the TV signal.

Wish there was some sort of documentation that would indicate what is happening to video during the playback steps.

Also it isn't Linux specific. I've seen similar issues with Windows MCE on the same hardware.
openmedia is offline   Reply With Quote
Old 11-08-06, 03:25 AM   #4
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Join Date: Dec 2005
Posts: 37
Default Re: Interlaced modes - Need some help

For me, driver 8183 was the last version that did interlaced output without the combing/panning affects.

9629 doesn't fix it either. There's a thread about maybe the field orders got reversed somewhere.
asdere is offline   Reply With Quote

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