Video stutter when starting playback
I've tried multiple recommended video encoding formats (prores proxy, photo jpeg, h.264) with QuickTime mov file type/container. I've also tried adjusting numerous performance tweaks settings. But it seems like no matter what I do, or where I position the playhead cursor, for the first few seconds after starting playback in a project, the video display stutters/jitters like it's getting stuck for a few ms every few frames. After the first few seconds, as the project continues playing, the video will be fine and smooth with no frames being stuck.
This occurs even with a new project with only the video track and no other tracks.
Any ideas what might be causing this or how I can fix it?
MacBook Pro (15-inch, 2017)
macOS Sierra (10.12.6)
REAPER v6.05/64 rev 527eef
Apogee Ensemble Thunderbolt
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