Media capture (AJA) doesn't grab UMG widgets in standalone mode.
New Level, make a UMG widget appear.
With MediaOutput/MediaCapture
- capture in editor (no Slate should be visible)
- capture in PIS (no Slate should be visible)
- capture in standalone (Slate was not visible but should be visible)
- capture in package cook by the book (Slate is visible
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-69282 in the post.