MediaRecorder.stop()

The MediaRecorder.stop() method (part of the MediaRecorder API) is used to stop media capture.

When the stop() method is invoked, the UA queues a task that runs the following steps:

1. If MediaRecorder.state is "inactive", raise a DOM InvalidState error and terminate these steps. If the MediaRecorder.state is not "inactive", continue on to the next step.
2. Set the MediaRecorder.state to "inactive" and stop capturing media.
3. Raise a dataavailable event containing the Blob of data that has been gathered.
4. Raise a stop event.

Syntax

<span id="idl-def-IDBIndex" class="idlInterface"><span id="idl-def-MediaRecorder" class="idlInterface"><span class="idlMethod"><span class="idlMethType"><span id="idl-def-MediaRecorder" class="idlInterface"><span class="idlMethod"><span class="idlMethType"><span id="idl-def-MediaRecorder" class="idlInterface"><span class="idlMethod"><span id="idl-def-MediaRecorder" class="idlInterface"> </span></span></span></span></span></span></span></span></span></span><span class="idlMethod"><span class="idlInterface"><span class="idlMethod"><span class="idlMethType"><span class="idlInterface"><span class="idlMethod"><span class="idlMethType"><span class="idlInterface"><span class="idlMethod"><span class="idlInterface"><span class="idlMethod">MediaRecorder.stop()</span></span></span></span></span></span></span></span></span></span></span>

Errors

An InvalidState error is raised if the stop() method is called while the MediaRecorder object’s MediaRecorder.state is "inactive" — it makes no sense to stop media capture if it is already stopped.

Example

...

  stop.onclick = function() {
    mediaRecorder.stop();
    console.log("recorder stopped, data available");
  }

...

Specifications

Browser compatibility

[1] The intial Firefox OS implementation only supported audio recording.

[2] To try this feature on Chrome, enable Experimental Web Platform features from chrome://flags . Currently only video is supported, not audio.

See also

• Using the MediaRecorder API
• Web Dictaphone: MediaRecorder + getUserMedia + Web Audio API visualization demo, by Chris Mills (source on Github.)
• simpl.info MediaStream Recording demo, by Sam Dutton.
• Navigator.getUserMedia