The MediaTrackSettings
dictionary's facingMode
property is a string indicating the direction in which the camera producing the video track represented by the MediaStreamTrack
is currently facing. This lets you determine what value was selected to comply with your specified constraints for this property's value as described in the MediaTrackConstraints.facingMode
property you provided when calling either getUserMedia()
or MediaStreamTrack.applyConstraints()
.
If needed, you can determine whether or not this constraint is supported by checking the value of MediaTrackSupportedConstraints.facingMode
as returned by a call to MediaDevices.getSupportedConstraints()
. However, typically this is unnecessary since browsers will ignore any constraints they're unfamiliar with.
Because RTP doesn't include this information, tracks associated with a WebRTC RTCPeerConnection
will never include this property.