Playback of videos with Media Framework will be frame-accurately synced to the timeline in Sequencer independently of the media player's real-time behavior. Sequencer internally handles communication and setup for this synchronization with the media player.
HACK Delta Media Player 1.20 2018 [PL]
Currently, only ImageMediaPlayer supports this new synchronization. If you use a media player that doesn't support this feature, playback will start or stop close to what is indicated by the Sequencer timeline; however, frame-by-frame alignment could be random. 2ff7e9595c