[mythtv-users] Problem with TV-out on geforce4 mx440

Andrew M. Bishop amb at gedanken.demon.co.uk
Sat Mar 1 17:56:15 UTC 2003


Vincent AE Scott <mythtv at codex.dyndns.tv> writes:

> I have the TV connected up the tv-out via an s-video to SCART cable.
> i believe the TV supports NTSC playback, its an old Bang & Olufsen.
> 
> My problem, arrises when i try and playback video thru the TV, it
> appears in black and white.  I have setup X to use two seperate
> ServerLayout sections, one for the monitor and one for tv-out.
> 
> With the following section:
> Section "Monitor"
>         Identifier      "TV"
>         HorizSync       30-50
>         VertRefresh     60
> EndSection
> 
> i get black and white playback.
> as i'm in the UK (PAL-I) shouldnt the VertRefresh by 50?

Yes, if you are trying to play back video with 25 fps then a 50 Hz
refresh rate is going to give the best picture.  With the default 60
Hz refresh rate the picture is not smooth.

My XF86Config-4 file contains the following sections that may be
useful for you.  It defaults to 800x600 @ 50 Hz PAL TV composite
output with the NVidia drivers.

-------------------- XF86Config-4 --------------------
Section "Monitor"
	Identifier	"Generic Monitor"
	HorizSync	15-50
	VertRefresh	50-60

	# PAL 60
	ModeLine "640x480x60" 25.2     640 656 752 800   480 490 492 525
	ModeLine "800x600x60" 39.7901  800 840 968 1056  600 601 605 628

	# PAL 50
	ModeLine "640x480x50" 21.0     640 656 752 800   480 490 492 525
	ModeLine "800x600x50" 33.1584  800 840 968 1056  600 601 605 628
EndSection

Section "Screen"
	Identifier	"Default Screen"
	Device		"Generic Device"
	Monitor		"Generic Monitor"
	Option		"TVStandard" "PAL-I"
	Option		"ConnectedMonitor" "TV"
	Option		"TVOutFormat" "COMPOSITE"
	Option		"AllowMouseOpenFail" "true"
	DefaultDepth	24
	SubSection "Display"
		Depth		24
		Modes		"800x600x50" "640x480x50"
	EndSubSection
EndSection
-------------------- XF86Config-4 --------------------

-- 
Andrew.
----------------------------------------------------------------------
Andrew M. Bishop                             amb at gedanken.demon.co.uk
                                      http://www.gedanken.demon.co.uk/


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