How can I remap the keys to adjust the audio delay? I have a video that plays fine on the built in player but is always about a 1 second off using mplayer. I have some other vids that play fine. If this feature can be added to the new menu system, it would be great.

I'm not sure if if could be the cause but the soundtrack is recorded in 48000Hz as opposed to 44100Hz my other video clips use.