footage lagging even after rendering entire timeline

[Danu.exe]

I have a project file sent to me by someone else, where for whatever reason the footage plays completely fine on their PC but is unbearably laggy on mine.

things I've tried:

- creating a new sequence in the same project file with different footage plays fine

- using proxies does not boost performance at all

- rendering the entire timeline has no effect on performance

- computer is more than capable of editing this type of footage and has done so many times before

- Clearing media cache has no effect

- Working with small sections of the footage in a smaller sequence helps, but it is still unusable

- Rendering audio doesn't help but also doesn't seem to work correctly. The rendering window appears for a split second before disappearing.

- global fx switch has no effect on performance.

- updating  Premiere Pro did not help, tried v 23.0 and returned to 22.6.2

- using Multicam instead of stacked footage does not help

PC specs:

RTX 3070 TI

AMD Ryzen 9 5900x

64GB ram

Screenshot of the rendered timeline in a smaller sequence

I am currently re-encoding all of the original media in hopes that might help, but given that rendering the timeline and using proxies made no difference, I'm not confident it will.

[Ann Bens · Accepted solution]

Make new project and import this one.

See how that goes.

[Danu.exe]

I owe you my life Ann Bens 🙏

[Marcus23230045z7pr]

That worked for me too! Why does this work, do you happen to know?

[Kevin-Monahan]

Hi @Marcus23230045z7pr,

Typically this happens when a project has been corrupted. This usually happens if you update a complex project to a new version of Premiere Pro or any other NLE; it doesn't matter. The rule of thumb is to avoid updating NLE app versions until major projects have been completed. Sometimes, that's hard to time it right and you can corrupt a project if you do not keep the rule of thumb in mind. I hope the advice helps.

Thanks,
Kevin