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In the VSE, the Strip Opacity not editable once a keyframe is set.
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System Information
MacBook Pro (Retina, 15-inch, Late 2013)
NVIDIA GeForce GT 750M 2048 MB

Blender Version
Broken: Version 2.76 (2.76, 2015-Oct-11)

When trying to animate the opacity of a strip in the VSE, once a keyframe is set I can't edit the value in the Properties panel.

Exact steps for others to reproduce the error

  1. New Blender File (or load attached one)
  2. Go to the VSE
  3. Add a scene strip
  4. Select scene strip with RMB
  5. Open up the properties panel with "n"
  6. Find the Strip Opacity attribute
  7. Drag the opacity.. it works fine.
  8. Set the opacity to 0.
  9. Set a key by hitting "i"
  10. Scrub ahead a few frames.
  11. Drag the opacity - It will keep snapping back to 0. Even typing will set it back to 0.

Related Objects

Event Timeline

Sergey Sharybin (sergey) changed the task status from Unknown Status to Unknown Status.Oct 21 2015, 8:53 AM
Sergey Sharybin (sergey) claimed this task.

Thanks for the report, but this is a known limitation mentioned in the TODO and was previously reported in T32890.

Ah, sorry about that Sergey, I didn't see that on the todo list.

My apologies! :)