Backport of "osxvideosink: fix deadlock upon closing output window" into 1.22
Backport of !4559 (merged) "osxvideosink: fix deadlock upon closing output window".
Commits:
- 560d20a2 osxvideosink: fix deadlock upon closing output window
Backport of !4559 (merged) "osxvideosink: fix deadlock upon closing output window".
Commits: