{"json_modified": "2016-08-31T08:57:46.180179", "uuid": "f3cabeb2-81d9-46c3-a9e8-fe03dab5233f", "title": "addtrack", "url": "/en-US/docs/Web/Events/addtrack", "tags": ["API", "MediaStreamTrackEvent", "Reference", "Media Streams API", "events", "Events"], "translations": [], "modified": "2016-08-31T08:57:46", "label": "addtrack", "localization_tags": [], "locale": "en-US", "id": 193227, "last_edit": "2016-08-31T08:57:40", "summary": "An <strong><code>addtrack</code></strong>\u00a0 is fired when the browser adds a track to a <a href=\"/en-US/docs/Web/API/MediaStream\" title=\"The MediaStream interface represents a stream of media content. A stream consists of several tracks such as&#xA0;video or audio tracks.\"><code>MediaStream</code></a> (such as when a <a href=\"/en-US/docs/Web/API/RTCPeerConnection\" title=\"The RTCPeerConnection interface represents a WebRTC connection between the local computer and a remote peer. It provides methods to connect to a remote peer, maintain and monitor the connection, and close the connection once it's no longer needed.\"><code>RTCPeerConnection</code></a> is renegotiated or a stream being captured using <a href=\"/en-US/docs/Web/API/HTMLMediaElement/captureStream\" title=\"The documentation about this has not yet been written; please consider contributing!\"><code>HTMLMediaElement.captureStream()</code></a> gets a new set of tracks because the media element being captured loaded a new source.", "sections": [{"id": "Quick_Links", "title": null}, {"id": "General_info", "title": "General info"}, {"id": "Properties", "title": "Properties"}, {"id": "Methods", "title": "Methods"}, {"id": "Related_events", "title": "Related events"}, {"id": "Specifications", "title": "Specifications"}, {"id": "Browser_compatibility", "title": "Browser compatibility"}, {"id": "See_also", "title": "See also"}], "slug": "Web/Events/addtrack", "review_tags": []}