tv-out pin change?

so i use the tv-out library on arduino mega 2560 but ive already got an tft touch screen on it but also whant to make an tv out the problem is one of the pins for tv-out is pin digital 29 is it posible to change it to another pin?? somthing like digital 45??

You need to look in the tv-out code. You should also check to see how that pin is used think timers.