web api instance property
MediaTrackSettings: latency property
The MediaTrackSettings dictionary’s
latency property is a double-precision floating-point
number indicating the estimated latency (specified in seconds) of the
MediaStreamTrack as currently configured. This lets you determine what
value was selected to comply with your specified constraints for this property’s value
as described in the latency property you provided
when calling either getUserMedia() or
applyConstraints().
This is, of course, an approximation, since latency can vary for many reasons including CPU, transmission, and storage overhead.
If needed, you can determine whether or not this constraint is supported by checking
the value of latency as returned by a call
to 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.
Value
A double-precision floating-point number indicating the estimated latency, in seconds, of the audio track as currently configured.
Examples
See the Constraint exerciser example.