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Check the Browser compatibility table carefully before using this in production.
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The timestampOffset property of the SourceBuffer interface controls the offset applied to timestamps inside media segments that are appended to the SourceBuffer.
The initial value of timestampOffset is 0.
var myOffset = sourceBuffer.timestampOffset; sourceBuffer.timestampOffset = 2.5;
A double, with the offset amount expressed in seconds.
The following errors may be thrown when setting a new value for this property.
| Error | Explanation |
|---|---|
InvalidStateError | One or more of the SourceBuffer objects in MediaSource.sourceBuffers are being updated (i.e. their SourceBuffer.updating property is currently true), a media segment inside the SourceBuffer is currently being parsed, or this SourceBuffer has been removed from the MediaSource. |
TBD
| Specification | Status | Comment |
|---|---|---|
| Media Source Extensions The definition of 'timestampOffset' in that specification. | Candidate Recommendation | Initial definition. |
| 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+.
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https://developer.mozilla.org/en-US/docs/Web/API/SourceBuffer/timestampOffset