The MediaRecorder.onwarning event handler (part of the MediaRecorder API) handles the recordingwarning event, allowing you to run code in response to non-fatal errors being thrown during media recording via a MediaRecorder, which don't halt recording.
Syntax
MediaRecorder.onwarning = function(event) { ... }
MediaRecorder.addEventListener('warning', function(event) { ... })
Example
...
mediaRecorder.onwarning = function(e) {
console.log("A warning has been raised: " + e.message);
}
...
Properties
- message
- Contains information about the error that occurred.
Specifications
| Specification | Status | Comment |
|---|---|---|
| MediaStream Recording | Working Draft | Initial definition |
Browser compatibility
| Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
|---|---|---|---|---|---|
| Basic support | 47[2] | 25.0 (25.0) | Not supported | Not supported | Not supported |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|---|
| Basic support | Not supported | Not supported | 25.0 (25.0) | 1.3[1] | Not supported | Not supported | Not supported | Not supported |
[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