弃用
This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the
兼容性表格
at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
RTCPeerConnection.onaddstream
event handler is a property containing the code to execute when the
addstream
event, of type
MediaStreamEvent
, is received by this
RTCPeerConnection
. Such an event is sent when a
MediaStream
is added to this connection by the remote peer. The event is sent immediately after the call
setRemoteDescription()
and doesn't wait for the result of the SDP negotiation.
重要：
This property has been
removed
from the specification; you should now use
RTCPeerConnection.ontrack
to watch for
track
events instead. It is included here in order to help you adapt existing code and understand existing samples, which may not be up-to-date yet.
rtcPeerConnection.onaddstream = eventHandler;
A function which handles
addstream
events. These events, of type
MediaStreamEvent
, are sent when streams are added to the connection by the remote peer. The first time an event occurs may be nearly immediately after the remote end of the connection is set using
RTCPeerConnection.setRemoteDescription()
; it doesn't wait for a particular stream to be accepted or rejected using
SDP
negotiation.
This code, based on an older version of our
Signaling and video calling
sample, responds to
addstream
events by setting the video source for a
<video>
element to the stream specified in the event, and then enabling a "hang up" button in the app's user interface.
pc.onaddstream = function(event) {
document.getElementById("received_video").srcObject = event.stream;
document.getElementById("hangup-button").disabled = false;
};
还可以使用
addEventListener()
to add a handler for
addstream
events to an
RTCPeerConnection
.
重要：
This property has been
removed
from the specification; you should now use
RTCPeerConnection.ontrack
to watch for
track
events instead. It is included here in order to help you adapt existing code and understand existing samples, which may not be up-to-date yet.
| 桌面 | 移动 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
onaddstream
弃用
非标
|
Chrome 24 | Edge 15 | Firefox 22 | IE No |
Opera
43
|
Safari No | WebView Android Yes | Chrome Android Yes | Firefox Android 44 |
Opera Android
43
|
Safari iOS No | Samsung Internet Android 6.0 |
完整支持
不支持
非标。预期跨浏览器支持较差。
弃用。不要用于新网站。
见实现注意事项。
track
event, its type
RTCTrackEvent
，和
RTCPeerConnection.ontrack
event handler property instead of this.
addstream
event and its type,
MediaStreamEvent
.