Ok, so we have this new fan dangled TV in the house, and now the same thing has come to the fore that i've had in my room.
When switching between something like Sky Sport 1 and TV One, the TV won't automatcially change between pillarbox (SS1) and full screen (TV1)
I know there's something called aspect ratio fixing that can fix this based on a flag, but don't know a lot about it to be honest.
Must a certain type of input be used for this to work (eg SCART, RGB etc)