New iMac with Hitfilm 12.3 thru 13 stuttering video playback
1. iMac 5K, 27 in
2. 3Ghz i5 processor
3. 8GB 2667Mhz RAM
4. Radeon Pro 570X, 4GB video card
Question: Why does Hitfilm stutter with video playback, even with no effects applied to a composite or transitions in the editor window. When looking at the Activity window on Mac, it shows the video card maxed out on memory and the processor running almost 90 percent!! I also own Final Cut, and when playing clips back, there is no lag and the performance of the video card is 1/2 of the usage it gets when I'm running Hitfilm.
I know Hitfilm is pretty much processing the rendering, playback, and encode/decode at the same time, but I believe my computer is more than adequate to support those things. I've even backtracked to previous versions of Hitfilm to see if there was a difference in playback, but it stutters on all versions back to 12.1
My clips are on external drives also, so I tried to place them on my desktop and run them from there, but still, same results.
Any help would be appreciated.