The MediaTrackSettings dictionary's channelCount property is an integer indicating how many audio channel the MediaStreamTrack is currently configured to have. This lets you determine what value was selected to comply with your specified constraints for this property's value as described in the MediaTrackConstraints.channelCount property you provided when calling either getUserMedia() or MediaStreamTrack.applyConstraints().
If needed, you can determine whether or not this constraint is supported by checking the value of MediaTrackSupportedConstraints.channelCount as returned by a call to MediaDevices.getSupportedConstraints(). However, typically this is unnecessary since browsers will simply ignore any constraints they're unfamiliar with.
Syntax
var channelCount = MediaTrackSettings.channelCount;
Value
An integer value indicating the number of audio channels on the track. A value of 1 indicates monaural sound, 2 means stereo, and so forth.
Example
See Example: Constraint exerciser in Capabilities, constraints, and settings for an example.
Specifications
| Specification | Status | Comment |
|---|---|---|
| Media Capture and StreamsThe definition of 'channelCount' in that specification. | Candidate Recommendation | Initial specification. |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
channelCount
|
Chrome
No support No |
Edge
No support No |
Firefox
No support No |
IE
No support No |
Opera
No support No |
Safari
? |
WebView Android
No support No |
Chrome Android
No support No |
Firefox Android
No support No |
Opera Android
No support No |
Safari iOS
? |
Samsung Internet Android
No support No |
Legend
- No support
- No support
- Compatibility unknown
- Compatibility unknown
See also
- Media Capture and Streams API
- Capabilities, constraints, and settings
MediaTrackConstraints.channelCountMediaTrackSettings
MediaTrackSettings.channelCount by Mozilla Contributors is licensed under CC-BY-SA 2.5.
