Here is the simplest way to understand this: Your CPU is fairly average and your Graphics Card (GPU) is low powered. This is where the processing power of your CPU and/or GPU has the biggest influence on video lag. It is not really unusual for the Preview Window to start lagging after you apply any Video Effect. The answer may be a simple setting, or several setups and settings that will help. Your question is extremely broad, and the answer could be any number or multiple numbers of causes and corrections. The more the better, as it helps to avoid the common question/answer, question/answer, round-about back-and-forth posts as members attempt to help you solve your issue. Please offer any information pertaining to your system and project you think may, even in the slightest, effect your symptoms. Those are a few questions that quickly come to mind, some of which may have nothing to do with your issue, but until you have the solution it could help. Have you layered effects, as in one over the other?Īre all the other programs you run on this computer running normally?ĭo you have any programs running in the background? In other words, have you added the same effects to similar source media in the past projects without experiencing the stutter?Ĭan you use MediaInfo (in text mode) to upload a screen shot of your source media?Ĭan you upload a screen shot of your Project Settings?Ĭan you upload a screen shot of your timeline where you have added effect?Ĭan you list the effects you have added which are stuttering? What is some history of previous projects?

Have similar projects been running fine and suddenly the stutter just start with your current project? Have you made any OS or software updates? How much available free space is left on your 3 tb work drive? Could you provide a bit more information so members can assist.

Hitfilm express laggy