The HTMLCanvasElement
captureStream()
method returns a MediaStream
which includes a CanvasCaptureMediaStreamTrack
containing a real-time video capture of the canvas's contents.
The HTMLCanvasElement
captureStream()
method returns a MediaStream
which includes a CanvasCaptureMediaStreamTrack
containing a real-time video capture of the canvas's contents.
MediaStream = canvas.captureStream(frameRate);
frameRate
Optional
A double-precision floating-point value that indicates the rate of capture of each frame. If not set, a new frame will be captured each time the canvas changes; if set to 0
, frames will not be captured automatically; instead, they will only be captured when the returned track's requestFrame()
method is called.
A reference to a MediaStream
object, which has a single CanvasCaptureMediaStreamTrack
in it.
NotSupportedError
DOMException
Thrown if the value of frameRate
is negative.
// Find the canvas element to capture var canvasElt = document.querySelector('canvas'); // Get the stream var stream = canvasElt.captureStream(25); // 25 FPS // Do things to the stream // E.g. Send it to another computer using an RTCPeerConnection // pc is an RTCPeerConnection created elsewhere pc.addStream(stream);
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
captureStream |
51 |
79 |
43 |
No |
36 |
11 |
51 |
51 |
43 |
36 |
11 |
5.0 |
HTMLMediaElement.captureStream()
, which allows capturing a stream from a media element. MediaStream
Media Capture and Streams API
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/HTMLCanvasElement/captureStream