UWP TimedMetadataTrack事件未触发

Question

I can not seem to get the a TimedMetadataTrack object to fire the events CueEntered or CueExited for SpeechCue events.

Any thoughts?

Answer 1

So, apparently this line is needed when registering for IMediaCue.CueEntered and IMedia.CueExited events (at least the SpeechCue implementation of the interface):

((Windows.Media.Playback.MediaPlaybackItem)item).TimedMetadataTracks.SetPresentationMode((uint)index, Windows.Media.Playback.TimedMetadataTrackPresentationMode.ApplicationPresented);

This line is required to exactly allow the system to send the CueEntered and CueExited events that are being listened for.

Yet again, another case of Microsoft not fully documenting things in their API Documentation or Code Examples.