Currently, if the media recorder hits an error during recording, an onerror callback will be fired with an object that has the name "GenericError." From a developer's perspective, this isn't that useful - it doesn't provide any context of the problem. We should improve our error messages here to indicate what actually failed when onerror fires from a media recording object.

We may attach the message in RecordErrorEvent through onError event. The error messages also involve localization problem. BTW, That topic is still unclear in w3c spec.

(In reply to Randy Lin [:rlin] from comment #1) > We may attach the message in RecordErrorEvent through onError event. > The error messages also involve localization problem. > BTW, That topic is still unclear in w3c spec. How would I access the message? I didn't see the message property on the object when I inspected in the console. I've only seen the "GenericError" portion of it.

We have not added it yet.

Beyond the lack of context, our code's RecordErrorEvent has a lone .name property [1] which is not to spec. Spec says it should have an .error property instead, among other things [2]. [1] http://mxr.mozilla.org/mozilla-central/source/dom/webidl/RecordErrorEvent.webidl#8 [2] https://w3c.github.io/mediacapture-record/MediaRecorder.html#errorevent

Bug 1275856 should address the issues noted in comment 4. We should also be providing a JS stack trace where possible. I'm in favour of closing this as the specific issues here have been addressed. :jib, yay/nay?

I agree.