MediaTrackSettings: sampleSize property
The MediaTrackSettings
dictionary's
sampleSize
property is an integer indicating the linear
sample size (in bits per sample) the MediaStreamTrack
is currently
configured for. This lets you determine what value was selected to comply with your
specified constraints for this property's value as described in the
MediaTrackConstraints.sampleSize
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.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
An integer value indicating how many bits each audio sample is represented by. The most commonly used sample size for many years now is 16 bits per sample, which was used for CD audio among others. Other common sample sizes are 8 (for reduced bandwidth requirements) and 24 (for high-resolution professional audio).
Each audio channel on the track requires sampleSize bits.
That means that a given sample actually uses (sampleSize
/8)*channelCount
bytes of data.
For example, 16-bit stereo audio requires (16/8)*2 or 4 bytes per sample.
Examples
See the Constraint exerciser example.
Specifications
Specification |
---|
Media Capture and Streams # dom-mediatracksettings-samplesize |
Browser compatibility
BCD tables only load in the browser