Why does Pr have such a hard time playing Long-GOP?
This problem has gone back several versions. Pr works fine with intraframe and MPEG-2 footage, but drops frames like crazy or won't even play 4K AVCHD, DJI, and other Long-GOP footage WITHOUT ANY EFFECTS OR SCALING applied, even at 1/4 or 1/8 resolution that plays smoothly in VLC and QT player outside of Premiere.
And this is intermittent. Some times it plays, some times it doesn't. When it doesn't, quitting and relaunching helps for a while, but it inevitably stops playing again.
I've been deleting my prefs several times a day, which also helps briefly, but that may be because quitting and relaunching is required to do that.
I have to render most of this type of footage to get it to play reliably. Time killer.
I'm not maxing out my 2GB/s RAID, 6-core (12 thread) 3.06 GHz CPU or Titan GPU and 128GB RAM. Not even close. I have iStat Menus installed, and can monitor my system resources in real-time by looking at my menu bar.
This certainly suggests the problem is in the way Pr is built. But, if I'm wrong and there's a fix for this, I'd be grateful to learn how.
System described above is on a MacPro5,1 running 10.13.6 with latest GPU and CUDA drivers installed.
