Do it this way:
Variables: r (real)
Trigger1
Event
Time - periodic event: Every 0.3 seconds of game time (if you want, you can do it more often)
Action
set r = perspective of current camera view
Trigger2
Event
Game - value of real variable: r gets unequal to 304.00
Action
Camera - Set Camera Field : Set Player1's camera perspective to 304.00 over 0.2 seconds
304.00 is the standard game view perspective; of course you have to do the Set Camera Field for every player you have in game. I don't know if the "Perspective of current camera" works correctly for more than one player, you have to try it out. But for one player, this should work and does not leak at all, I think.