According to a Digital Foundry analysis of Call of Duty: Ghosts the game actually renders at more than 60fps on PS4 and this results in juddering due to the console's 60Hz video output restriction.
Digital Foundry reports that Ghosts "actually runs at higher frame-rates than 60fps on a fairly frequent basis". This leads to "judder and perceived frame-rate loss".
Due to the technical inconsistencies players sometimes see "skipped and incomplete frames" which is said to be "arguably far more noticeable than a few prolonged drops down to 50fps or so seen the 360 version of the game."
However, Digital Foundry notes that the day-one patch for Ghosts – which also boosts the PS4 version to 1080p – is said to largely, if not completely, remove the problem.
"The good news is that the issue of skipped frames is reduced to a noticeable degree, particularly in some of the opening moments of the game although the problem hasn't been completely eliminated.
"There is still noticeable judder present throughout the patched campaign that appear on a regular basis, which is often distracting when trying to line up a quick succession of precise shots in the heat of battle."
The analysis goes on to note that while the framerate is typically between 50 and 60fps it can drop to 40 during times of heavy stress.
"Thankfully, the effects of these normal frame-rate drops are less obviously visible than the judder caused by the renderer exceeding the 60Hz refresh although even with the 1080p patch enabled things don't appear as smooth as the Xbox 360 version of the game."
Call of Duty: Ghosts is out now.
