{"json_modified": "2016-03-28T08:47:13.184072", "uuid": "4d255ce8-50b2-4157-bb1e-82682160e66f", "title": "SourceBuffer.trackDefaults", "url": "/en-US/docs/Web/API/SourceBuffer/trackDefaults", "tags": ["API", "SourceBuffer", "Property", "Reference", "Audio", "Media Source Extensions", "Video", "MSE", "trackDefaults", "Experimental"], "translations": [], "modified": "2015-10-13T03:51:49", "label": "SourceBuffer.trackDefaults", "localization_tags": [], "locale": "en-US", "id": 163203, "last_edit": "2015-10-13T03:51:28", "summary": "The <code><strong>trackDefaults</strong></code> property of the <a href=\"/en-US/docs/Web/API/SourceBuffer\" title=\"The SourceBuffer interface represents a chunk of media to be passed into an HTMLMediaElement and played, via a MediaSource object. This can be made up of one or several media segments.\"><code>SourceBuffer</code></a> interface specifies the default values to use if kind, label, and/or language information is not available in the <a href=\"https://w3c.github.io/media-source/#init-segment\">initialization segment</a> of the media to be appended to the <code>SourceBuffer</code>.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "Syntax", "title": "Syntax"}, {"id": "Value", "title": "Value"}, {"id": "Errors", "title": "Errors"}, {"id": "Example", "title": "Example"}, {"id": "Specifications", "title": "Specifications"}, {"id": "Browser_compatibility", "title": "Browser compatibility"}, {"id": "See_also", "title": "See also"}], "slug": "Web/API/SourceBuffer/trackDefaults", "review_tags": []}