Lumetri Scopes Lag

[mandolinista]

my specs

windows 10 64 bit

intel i9-10900k 3.7

132 ram

rtx 3080 nvidia.

premiere 15.2

 Latest Nvidia Studio driver.

All SSD Drives

Great machine for editing. But with the new premiere update my lumetri scopes lag. When I click on the window it can take 10-15 seconds for window to appear. And then if I change something it doesnt always change on the scopes. I have to advance a frame or two for it to register that something is changing. Any ideas? It works but has made my color grading workflow incredibly annoying.

[R Neil Haugen]

Huh ... not getting that on my PC ... that would be frustrating, yea.

What's the media? Format/codec, created by what? Any other effects applied?

Neil

[mandolinista]

It is H.264 footage. Standard stuff shot on Sony A7R iii and Sony A7iii in 4k. Also happens on stuff shot on a7s 1920x1080.

[mandolinista]

And effects like Lumetri color stuff. Sometimes using Red Giants Colorista or Filmconvert Nitrate, but it seems to be the same no matter what.

[Kevin-Monahan]

Mandolinsta,

Any nested audio? If so, remove it and see if your performance improves.

Regards,
Kevin

[mandolinista · Accepted solution]

no but I might have figured it out! Deleted media cache. I had done that before multiple times and it didnt seem to fix the issue, but after researching and posting I tried one more time and it seems fixed ha. Thanks anyway.

[markh57714475]

I'm having exactly the same issue. I was wondering if it's because I'm editing 4K 10-bit 422 files in h.264 without transcoding tehm to Cine or ProRes first. 

Just had a chat with Adobe tech support (online chat to India I think) and he gave me no ideas as to why.

Would appreciate any thoughts.. but I'll try the transcode to uncompressed media route and report back..

Oh and mys system is a 2020 iMac 27" with 8 core i7, 64Gb RAM, AMD RADEON 5700 XY with 16GB.

[R Neil Haugen]

Would be good to get that data point ... if in an intraframe such as ProRes or Cine, does it work better?

Neil

[Richard van den Boogaard]

Generally, long GOP (Group of Pictures) files are much more taxing on an EDL than an intraframe codec.

Remember that 4K is actually four times the information load of 1080p.

H.264 really is a delivery codec, not an editing codec.