MediaTrackConstraints: sampleSize property

The MediaTrackConstraints dictionary's sampleSize property is a ConstrainULong describing the requested or mandatory constraints placed upon the value of the sampleSize constrainable property.

If needed, you can determine whether or not this constraint is supported by checking the value of MediaTrackSupportedConstraints.sampleSize as returned by a call to MediaDevices.getSupportedConstraints(). However, typically this is unnecessary since browsers will ignore any constraints they're unfamiliar with.

Value

If this value is a number, the user agent will attempt to obtain media whose sample size (in bits per linear sample) is as close as possible to this number given the capabilities of the hardware and the other constraints specified. Otherwise, the value of this ConstrainULong will guide the user agent in its efforts to provide an exact match to the required sample size (if exact is specified or both min and max are provided and have the same value) or to a best-possible value.

Note: Since this property can only represent linear sample sizes, this constraint can only be met by devices that can produce audio with linear samples.

Examples

See the Constraint exerciser example.

Specifications

Specification
Media Capture and Streams
# dom-mediatrackconstraintset-samplesize

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
sampleSize constraint

Legend

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Full support
Full support
No support
No support

See also