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HOWTO_Setup_TV_Output_for_MythTV

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TV Output

If you will be connecting your computer to a TV, now is a good time to set up that output. Here's an example Device setup section for a GeForce 4 MX video card using the 1.0-6111 nvidia driver to output to an NTSC television via S-Video (this should work equally for any GF4 or FX series card, as well as GF2/3, minus TVOverScan):

File: /etc/X11/xorg.conf
Section "Device"
Identifier  "Videocard0"
Driver      "nvidia"
VendorName  "Chaintech"
BoardName   "nVidia GeForce 4 MX 440"
# TV Out Setup
Option      "TVStandard" "NTSC-M"
Option      "TVOutFormat" "SVIDEO"
Option      "TVOverScan" "0.6"
EndSection

If you have trouble editing the file, login as root by hitting <CTRL><ALT><F1>.

Those with particularly cantankerous displays and/or people who want to pass their signal through an A/V switchbox may have problems with their card/drivers not auto-detecting the attached display type, in which case, you can add an Option line to the above Device section to force the display type, such as this one:

Option     "ConnectedMonitor" "TV"

You will likely have to tweak the TVOverScan option value to best suit your TV. Valid values range from 0.0 (no overscan) to 1.0 (overscan as much as possible). This helps to eliminate a black border from showing up around the picture on your TV. Again, note that overscan is only supported on GeForce4-class (or newer) video cards, but all other options should work for earlier nVidia cards. Obviously, your settings may vary slightly, depending on your card.

If your TV does not support S-Video, or for some other reason you don't want to use it, you may like to try setting to to composite instead. From my experience, it works fine through an S-Video socket to SCART.

Option      "TVOutFormat" "COMPOSITE"

To use COMPOSITE you will need to use the s-video to rgb cable and use the blue connector. The COMPOSITE signal will be on there. (Only after months I figured this out)

nvidia-settings

In newer nVidia drivers, the nvidia-settings package provides a way to tweak the settings. The nvidia-settings application is a GUI that runs under X that allows you to adjust a number of essential parameters. You can adjust the overscan value so that the image fills the entire screen, use flicker-smoothing, and a number of other things. When you exit the program it will save your settings in a file called ".nvidia-settings-rc". Each time you restart X you will have to use this file using a command similar to nvidia-settings --load-config-only &. See the HOWTO Autostart Programs guide for instructions on adding this to your WM.


nvidia XvMC note

I moved this to the MythTV 'X setup' section. Due to a few changes and XvMC not specifically being for TV out, I felt it was more appropriate for it to be there.

Hauppauge 350

The Hauppauge PVR 350 includes a TV-Out port. To connect this to a TV instead of a video card, see the HOWTO X windows through Hauppauge 350 TV Out guide.

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Last modified: Sat, 14 Jun 2008 16:28:00 +0000 Hits: 18,348