DisplayMediaStreamConstraints
dictionary is used to specify whether or not to include video and/or audio tracks in the
MediaStream
to be returned by
getDisplayMedia()
, as well as what type of processing must be applied to the tracks.
Processing information is specified using
MediaTrackConstraints
objects providing options which are applied to the track after the media data is received but before it is made available on the
MediaStream
.
audio
MediaTrackConstraints
value; if a Boolean, this value simply indicates whether or not to include an audio track in the
MediaStream
返回通过
getDisplayMedia()
. If a
MediaTrackConstraints
object is provided here, an audio track is included in the stream, but the audio is processed to match the specified constraints after being retrieved from the hardware but before being added to the
MediaStream
。默认值为
false
.
视频
true
(the default), the display contents are included in a
MediaStreamTrack
within the stream provided by
getDisplayMedia()
. Optionally, a
MediaTrackConstraints
object may be given, providing options specifying processing to be performed on the video data before adding it to the stream. A value of
false
is not permitted, and results in a
TypeError
being thrown.
| 规范 | 状态 | 注释 |
|---|---|---|
|
未知
The definition of 'DisplayMediaStreamConstraints' in that specification. |
未知 | 初始定义 |
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DisplayMediaStreamConstraints
MediaDevices.getDisplayMedia()
MediaTrackConstraints.cursor
MediaTrackConstraints.displaySurface
MediaTrackConstraints.logicalSurface
MediaTrackSettings.cursor
MediaTrackSettings.displaySurface
MediaTrackSettings.logicalSurface
MediaTrackSupportedConstraints.cursor
MediaTrackSupportedConstraints.displaySurface
MediaTrackSupportedConstraints.logicalSurface