Warp Stabilizer in Premiere Pro becomes extremely slow

[Michael36140717tkw3]

Warp Stabilizer takes an unusually long amount of time to analyze a clip with Lumetri applied.

In the same project, I had applied warp stabilizer to the clip in question earlier without issue. After applying Lumetri to the same clip, warp stabilizer then took much longer (over an hour vs roughly 10 min) to analyze the very same 2 minute and 40 second clip. Upon removing Lumetri, warp stablizer went back to taking about 10 minutes to analyze.

It doesn't seem to be affecting anything, but in case it is relevant, in addition to Lumetri, I had applied an opacity mask to mask out the subjects in an attempt to get better stablization, and nested the clip before applying warp stabilizer. By removing Lumetri and changing nothing else, it functioned normally again.

Some system/software info:

i9-12900K

32GB RAM

RTX 3080

Windows 11 Home

Premiere Pro v25.3

Sequence settings:

1920x1080

23.976fps

48kHz

Clip was taken from source footage with these attributes:

Type: MPEG Movie
File Size: 6.12 GB
Image Size: 3840 x 2160
Frame Rate: 23.976
Source Audio Format: 48000 Hz - 16-bit - Stereo
Project Audio Format: 48000 Hz - 32 bit floating point - Stereo
Total Duration: 00:05:46:12
Pixel Aspect Ratio: 1.0
Alpha: None
Color Space: Rec. 709
Color Space Override: Off
Input LUT: None
Video Codec Type: MP4/MOV H.264 10 bit 4:2:2

[Dani_V.]

Hi @Michael36140717tkw3,

Welcome to the Premiere Pro forums and sorry for the frustration. Thank you for the information provided.

So if I understand correctly, you are adding the Warp Stabilizer effect on the nest itself, and inside the nest is the clip with the opacity mask + Lumetri effect?

What kind of Lumetri effects are you adding to the clip, and are you working with log footage at all?

As a workaround, are the Lumetri changes something you could apply to an adjustment layer, on top of the nested clip instead?

Hope we can help you soon,
Dani

[Michael36140717tkw3]

Hi Dani,

Thanks for your quick response. Yes, you are correct--warp stabilizer was applied to the nest, and Lumetri and the opacity mask were applied to the clip itself within the nest. No log footage, just a few basic color corrections were applied within Lumetri. The workaround I ended up using was to just copy my Lumetri settings, delete Lumetri, and then reapply them to the clip after using warp stabilizer. Not a huge inconvenience for me currently, but it does seem like a bug of some kind, and may frustrate other users who are trying to troubleshoot this issue within a more complex project.

Thank you,

Michael