Did a search; its been reported once before, a while ago. No resolution there. Thought I’d test the water again…
Imported video, MP4 (H.264). About 1min 35 secs long. No thumbnails displayed; no luck being ‘force generated’ manually (as per the Manual). Thumbnail Cache size set in Preferences at maximum (128Mb).
Video plays fine; audio has been extracted fine. Just no thumbnails generated.
So, anyone else.?