I'm using a standard widescreen TV as my display. I had a lot of problems getting a full-screen image, until I found that Myth had a setting allowing it to run the UI and the Live TV at different resolutions.
In order to get a full-screen image for watching TV, the resolution I need seems to be 640x400, while 640x480 is what is being used for the UI.
However, I've had no such luck getting Video from the Media->Video menu to play full screen. Whenever I play video from here, whether it is the recorded TV or a DVD, the image has large black bars top and bottom, so that only two thirds of the screen is used vertically for the image.
Can anyone tell me how to get a full-screen image?