GiantBomb is reporting that a patch may be on the way for CoD: Ghosts to resolve PS4 framerate issues:
https://www.giantbomb.com/articles/a-few-last-minute-bits-of-playstation-4-info/1100-4785/
"The early reviews of Call of Duty: Ghosts--including mine--mentioned that the PlayStation 4 version of the game suffers from occasional frame rate issues. For me, it usually showed up whenever there were a lot of particle effects on screen, but it'd pop up at random, too. I'm told that Infinity Ward is working on a patch to correct the performance issues. As our review currently doesn't apply to the PS4 version of the game--I want to play that and the Xbox One version on real multiplayer servers before assigning it a number--I'm going to see if that patch makes its way live this week and see if it helps. Currently, I'd call it a toss up between the Xbox One and PS4 versions--the Xbox One version has a smoother frame rate, but I'd rather play the game on a Dual Shock 4. Getting that frame rate pegged would definitively swing things in the PS4's direction, even over the PC version, which is sort of a mess. Of course, we're talking about minor differences in a game that has much more significant issues than mere frame rate, so you probably shouldn't take any of this as a ringing endorsement of the release without reading my review first."