[Chris Wright]

here’s a p3 to rec. 709 lut i made. some people say it helps.

https://f1.creativecow.net/9882/p3-to-rec-709-x64-iridas-cube

[Chris Wright]

you could trick this lut generator with a png shown in safari, screenshot it and use it for the “modified” png. should interpolate the lut transform.

https://generator.iwltbap.com/

[Chris Wright]

gpu-z will report gpu usuage.

[Chris Wright]

premiere can’t color manage. it shows rec.709 in preview, render, and mercury transmit. you can use a p3 to rec. 709 LUT if you wish.
the internet is sRGB or basically rec. 709 0-255 with gamma 2.2. in this way, they are exactly the same. until you use a LUT, I recommend setting your monitor to sRGB. most video players can’t play p3 except madvr

[Chris Wright]

its a very complicated answer because even using proxies like 422 LT or cineform. you still have to transcode, and that takes time.
your notion that proxies can be HD is partially true, the sequence itself still has to be 4k and your limited by audio channel matching.

You also can’t grade with proxies in RAW, there is no RAW conforming to new redcolor/redgamma. You can’t key in proxies as they are usually lower quality, and finally, any stabilization will force original media and disable proxies altogether!

As a matter of fact, after lots of testing, we just found out that rendering in 4k actually uses all 24 cpu threads at 100% versus HD being limited to 12 at 50%, seems to be a bug as well.

As for GPU, it only accelerates this stuff here:
https://blogs.adobe.com/creativecloud/cuda-mercury-playback-engine-and-adobe-premiere-pro/

so if you don’t use any of that stuff, a cheaper gpu could be replaced with a faster cpu for more bang for your buck so to speak.

[Chris Wright]

I can’t promise this will work for you, but many people have had luck using this LUT I made for youtube.

64 cube iridas lut for burning in darker 16-235 from 0-255 for youtube upload. it darkens image, then youtube re-lightens again.
https://f1.creativecow.net/10598/fixmyyoutube

note:
it doesn’t work with adjustment layers directly
you have to use it in the dropdown for the export in adobe media encoder. or you can NEST it first.
its a premiere bug. also it needs to be copied in both premiere-lumetri-technical and adobe media encoder-lumetri-technical

[Chris Wright]

adding lumetri might max out cpu if using luts. using any stabilization disables those particular proxies and uses original media. if you can playback fine until adding lumetri, its seems that’s your culprit. ProRes 422 LT would have been easiest on your hd. cineform preview codec is easiest on cpu preview/playback.

Here’s some other stuff:
Since a lot of people have been having problems with smooth playback,
here’s my total “make everything playback smoother” solutions chart.

1. un-ticked “Enable accelerated Intel h.264 decoding” in preferences/media tab and close extra premiere panels-hidden?
2. add premiere in NVidia Control Panel as an application for discrete gpu
3. power option-maximum performance

4. Make Sure The Composite Preview During Trim is Turned Off and also make sure your Reference Monitor is Also Closed
5. Set Preferences : > Audio hardware > Default Input: to None
10. toggling off the High Dynamic Range setting and LUT’s in the setting menu of the Lumetri Color panel improves gpu
12. disable “High Quality Playback” setting in the monitor wrench menu improves gpu
13. disable mercury transmit
15. freezing up on mac permission issue
https://blogs.adobe.com/kevinmonahan/2014/09/10/premiere-pro-cc-freezing-on-...

19. Changed Audio Hardware from MME to ASIO.(lower level audio driver for lower latency)
20. Limited Premiere’s RAM allocation to 32Gb if you have 64GB
21. In task manager, set affinity to utilize only 12 cores for PP (unfortunately, this setting does not hold on re-launch)
23. in bios, disable Intel Speedstep.
24. disable C1E – in the bios, power settings,change to performance.
26.disable sequence composite linear color/disable max bit depth
27. sequence settings preview file 1/2-1/4 size
28. don’t use lumetri luts until finish editing with an adjustment layer, toggle effects off

[Chris Wright]

the best quality comes from dnxhd/hr uploaded, but you need a fast internet upload connection.

[Chris Wright]

i find that if I use a duplicated video alpha matte with a shift-alpha luminance with levels alpha white 0.3, i can unsharp without hurting the blacks. looks really good without looking silly. only affects midtones.

[Chris Wright]

in AE,
https://www.motionscript.com/design-guide/up-down-clock.html