Deprecated
This feature has been removed from the Web standards. Though some browsers may still support it, it is in the process of being dropped. Avoid using it and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.
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) | No support | No support | No support |
| Feature | Android | Android Webview | Firefox Mobile (Gecko) | Firefox OS | IE Phone | Opera Mobile | Safari Mobile | Chrome for Android |
|---|---|---|---|---|---|---|---|---|
| Basic support | No support | No support | 25.0 (25.0) | 1.3[1] | No support | No support | No support | No support |
[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