The MediaTrackConstraints
dictionary's sampleSize
property is a ConstrainLong
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 simply ignore any constraints they're unfamiliar with.
var constraintsObject = { sampleSize: constraint }; constraintsObject.sampleSize = constraint;
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 ConstrainLong
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.
Since this property can only represent linear sample sizes, this constraint can only be met by devices that can produce audio with linear samples.
See Example: Constraint exerciser in Capabilities, constraints, and settings for an example.
Specification | Status | Comment |
---|---|---|
Media Capture and Streams The definition of 'sampleSize' in that specification. | Editor's Draft | Initial specification. |
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | No support | No support | (Yes) | ? |
Feature | Android | Android Webview | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile | Chrome for Android |
---|---|---|---|---|---|---|---|
Basic support | ? | (Yes) | No support | No support | ? | ? | (Yes) |
MediaTrackConstraints
MediaDevices.getSupportedConstraints()
MediaTrackSupportedConstraints
MediaStreamTrack
© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/MediaTrackConstraints/sampleSize