I shot some video at 1080 @90 FPS. I put in the time line and changed the speed to 300%. the first second or two of the video is fine but after that it becomes really choppy. It's not watchable at this point. I exported it using the YouTube 1080 HD preset. I wondered if the viewer playback was just choppy and it would render correctly. I was wrong. The playback in the viewer is exactly how it is rendered. I read that some issues like this could be hardware. Here are my specs.
CPU:Xeon 5674 @3.07Ghz
Video: Nvidia GeForce GT710
I am just trying to make a simply time laps. My camera has a time laps setting but I would prefer not to have to change the settings. If shooting it in the time laps mode is the best way to get a time laps then I will re-shoot the video. Thanks!