The getCapabilities() method of the MediaStreamTrack interface returns a MediaTrackCapabilities object which specifies the values or range of values which each constrianable property, based upon the platform and user agent.
Once you know what the browser's capabilities are, your script can use applyConstraints() to ask for the track to be configured to match ideal or acceptable settings. See Capabilities and constraints in Media Capture and Streams API (Media Streams) for details on how to work with constrainable properties.
var capabilities = MediaStreamTrack.getCapabilities();
None.
A MediaTrackCapabilities object which specifies the value or range of values which are supported for each of the user agent's supported constrainable properties.
| Specification | Status | Comment |
|---|---|---|
| Media Capture and Streams The definition of 'getConstraints()' in that specification. | Editor's Draft | Initial definition. |
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|
| Basic support | No support | No support | ? | ? | ? |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|
| Basic support | No support | No support | No support | ? | ? | ? | No support |
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https://developer.mozilla.org/en-US/docs/Web/API/MediaStreamTrack/getCapabilities