"Allow Sequencer Edits Only" and Control Rig performance impact

Development Cinematics & Media
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1

Hi

We noticed an issue working in sequencer with “Allow Seqeuncer Edits Only” and control rigs. Performance will drop when manipulating using the AnimDetails channel sliders.

See attached video/steps to repro

Thanks

Luke

seq_edits_only_anim_details.mp4(6.18 MB)

2

Steps to Reproduce

  1. Add a control rig to sequecner
  2. Change sequencer to “Allow Seqeuncer Edits Only”
  3. Drag change a control value using Anim Details pane
  4. (Sometimes you may observer a long (5-10s) hitch as soon as you try to interact)
  5. Observe performance drops and sequenncer window flickers while the value is changed
3

Hey,

I’ve confirmed this, but currently don’t have a workaround. You can follow the issue here: https://issues.unrealengine.com/issue/UE-371903

The issue stems from an exception that fires every frame while scrubbing the control value, as it attempts to find the control rig object in a flow that can’t find it in code. The only workaround I would suggest at the moment is not to use Allow Sequencer Edits Only when editing control rigs.

Dustin