SourceBuffer.appendWindowStart

Experimental

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Draft

This page is not complete.

The appendWindowStart property of the SourceBuffer interface controls the timestamp for the start of the append window, a timestamp range that can be used to filter what media data is appended to the SourceBuffer. Coded media frames with timestamps wthin this range will be appended, whereas those outside the range will be filtered out.

The default value of appendWindowStart is the presentation start time, which is the beginning time of the playable media.

Syntax

var myAppendWindowStart = sourceBuffer.appendWindowStart;

sourceBuffer.appendWindowStart = 2.0;

Value

A double, indicating the start time of the append window, in seconds.

Exceptions

The following exceptions may be thrown when setting a new value for this property.

Exception Explanation
InvalidAccessError An attempt was made to set the value to less than 0, or a value greater than or equal to SourceBuffer.appendWindowEnd.
InvalidStateError This SourceBuffer object is being updated (i.e. its SourceBuffer.updating property is currently true), or this SourceBuffer has been removed from the MediaSource.

Example

TBD

Specifications

Specification
Media Source Extensions™
# dom-sourcebuffer-appendwindowstart

Browser compatibility

BCD tables only load in the browser

See also