This is an experimental technology
Because this technology's specification has not stabilized, check the compatibility table for the proper prefixes to use in various browsers. Also note that the syntax and behavior of an experimental technology is subject to change in future versions of browsers as the spec changes.
The CanvasCaptureMediaStream.requestFrame() method forces a frame to be captured and sent to the stream. This allows to capture partially rendered frames.
stream.requestFrame();
// Find the canvas element to capture
var canvasElt = document.getElementsByTagName("canvas")[0];
// Get the stream
var stream = canvasElt.captureStream(25); // 25 FPS
// Send the current state of the canvas as a frame to the stream
stream.requestFrame();
| Specification | Status | Comment |
|---|---|---|
| Media Capture from DOM Elements The definition of 'CanvasCaptureMediaStream.requestFrame()' in that specification. | Editor's Draft | Initial definition |
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | ? | 41 (41)[1] | Not supported | ? | ? |
| Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|
| Basic support | ? | ?[1] | 34.0 (34) | Not supported | ? | ? |
[1] Disabled by default; set the preference canvas.capturestream.enabled to true to activate.
CanvasCaptureMediaStream, the interface it belongs to.
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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/CanvasCaptureMediaStream/requestFrame