Merge commit '19fe783d83b10ecfae3494f7b1ceff9584ad3839' * commit '19fe783d83b10ecfae3494f7b1ceff9584ad3839': Proper sync-frame detection for sources that don't already provide it.
Merge commit '19fe783d83b10ecfae3494f7b1ceff9584ad3839' * commit '19fe783d83b10ecfae3494f7b1ceff9584ad3839': Proper sync-frame detection for sources that don't already provide it.