Lag or Freeze video during playback

@ColbyFulton That is so true. I forgot to mention that my footage is all on SSDs Samsung installed on the motherboard causing the least amount of bottleneck possible.

I also tried with NVMe that read/writes at over 5,000MBs I'm quite sure this is not a hardware problem at all.

I have a new M1 Ultra Mac Studio and I have playback problems too - and none of my clips are even 4k. I blame it on the fact that there's a lot of clips in my project on several different drives (it's my demo reel), but it would be nice if the program would cache the video in RAM or something. I have 64 GB of RAM, 20 CPU cores and 48 GPU cores. I don't think Premiere is taking advantage of it all.

... Specifically playback with the Lumetri Scopes open is known to add a performance hit - but I would try with all non-player windows closed just to check. 

No problem - I'm happy to help.

If you monitor the CPU usage tab in Task Manager during playback is one of your CPU cores fully loaded?

By default Task Manager groups all CPU cores together and averages their utilization into a single graph, but you can right click the CPU utilization graph and select "Change graph to" -> "Logical processors". Your workflow might be bottlenecked by single CPU core performance. If during playback you see one or more cores 100% and others not - it indicates a single thread bottleneck.

I think it's also worth trying playback after closing all Premiere windows except the main playback window (you might want to save your workspace first). During playback Premiere updates many of those windows you have open and with a large number of high-res displays I'm wondering if this updating of non-playback windows might be responsible for the playback stutter. 

Hey @Kyle Plumadore 
Thank you so much for helping me out.

But all CPU and GPU are sleeping 

Is playback performance any better if you skip the footage interpreation/speed ramp? In general, it's better to not double interpolate footage - if I'm understanding correctly it sounds like you're doing 120fps footage as 23.976 but then interpolating back to the clips original frame rate. This might introduce a performance hit - especially if you're using optical flow or frame blending in the second interpolation step.

Also is your source content 10-bit 4:2:2 h.264/5? Unfortunately there is no hardware decode support for that format with current nVidia GPUs and playback of 120fps (with multiple clips?) will likely max out your CPU. You might consider re-encoding to a different format/lower resolution to help out while editing. 

All footage that was shot above 23.976fps gets reinterpreted inside the media folder as 23.976.
Some clips (that are now in slow-mo) have some time remapping to create a speed ramp effect in the Effects Control Pannel.

Sharp FHD 60Hz
MSI 4K 59.94Hz

LG (x2) 4K 60HZ

Thanks for the info. I understand it's not always possible to share media.

> The footage that always lags is any 120fps/59.99fps that gets reinterpreted to 23.976fps

Are you reinterpreting the media via the interpret footage dialogue or are you just dropping the 120fps media in a 23.976 sequence? 

Couple additional questions:
What is your display refresh rate / hz?

If you drop the same media into a new sequence (no interpolation) does the same media play smoothly? Is it smooth when played in the source monitor?

Hello Kyle,

The footage that always lags is any 120fps/59.99fps that gets reinterpreted to 23.976fps;

Any footage that has lumetry applied;

Any footage that has effects;

 Any camera used Sony FX6, Nikon Z9, Sony AIII, Arri Alexa 35 and Amira.

(I can't hare the footage as this is for a new show that will be broadcasted and it would be a breech of contract)

Hi Sergio,

Playback performance is a priority for the Premiere team. 

I would expect most 4K media to play smoothly on your config. I have a similar setup and don't experience the general performance issues you are describing.

Do you experience poor playback performance with a variety of media from multiple different sources/cameras? Sometimes media from a specific source can be problematic.

Can you share a piece of media that you experience poor playback performance with?