mythtv@woop:~$ cat /usr/local/bin/resetvideo.sh 
#!/bin/sh

export DISPLAY=:0

echo "Using xrandr to reset video resolution"
/usr/X11R6/bin/xrandr -s 0/720x480

echo "Resetting Overscan"
/usr/bin/nvidia-settings --assign="TVOverScan=24"
/usr/bin/nvidia-settings --assign="TVOverScan=25"

echo "Enabling Texturesharpen"
/usr/bin/nvidia-settings --assign="TextureSharpen=1"

echo "Resetting Flicker Filter"
/usr/bin/nvidia-settings --assign="TVFlickerFilter=1"