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 | Status | Comment |
---|---|---|
Media Source Extensions The definition of 'appendWindowStart' in that specification. |
Recommendation | Initial definition. |
Browser compatibility
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
appendWindowStart | Chrome Full support 23 | Edge Full support 12 | Firefox
Full support
42
| IE
Full support
11
| Opera Full support 15 | Safari Full support 8 | WebView Android Full support 4.4.3 | Chrome Android Full support 33 | Firefox Android No support No | Opera Android Full support 14 | Safari iOS No support No | Samsung Internet Android Full support 3.0 |
Legend
- Full support
- Full support
- No support
- No support
- See implementation notes.
- See implementation notes.
- User must explicitly enable this feature.
- User must explicitly enable this feature.