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

The SourceBufferList interface represents a simple container list for multiple SourceBuffer objects.

The source buffer list containing the SourceBuffers appended to a particular MediaSource can be retrieved using the MediaSource.sourceBuffers property.


SourceBufferList.length Read only
Returns the number of SourceBuffer objects in the list.

Event handlers

The event handler for the addsourcebuffer event.
The event handler for the removesourcebuffer event.


Inherits methods from its parent interface, EventTarget.

This getter allows the SourceBuffer objects in the list to be accessed with an array operator (i.e. [].)




Specification Status Comment
Media Source Extensions
The definition of 'SourceBufferList' in that specification.
Candidate Recommendation Initial definition.

Browser compatibility

Feature Chrome Edge Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support 23 (Yes) 25.0 (25.0)[1]
42.0 (42.0)
11[2] 15 8
Feature Android Edge Firefox Mobile (Gecko) Firefox OS (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support 4.4.4 (Yes)

No support

No support 11 30 No support

[1] Available after switching the about:config preference media.mediasource.enabled to true. In addition, support was limited to a whitelist of sites, for example YouTube, Netflix, and other popular streaming sites. The whitelist was removed and Media Source Extensions was enabled by default in 42+ for all sites.

[2] Only works on Windows 8+.

See also

Document Tags and Contributors

 Contributors to this page: Jedipedia, tocretpa, abbycar, chrisdavidmills
 Last updated by: Jedipedia,