RecordRTC breaking updates: Videos tracks are auto-skipped for audio recordings.

You must always pass {type:video} for audio+video (i.e. webm) recording;
otherwise pass {type:audio} to record only audio in ogg format.
RecordRTC will skip video tracks for ogg recordings.

// stream.getVideoTracks().length == 1
// stream.getAudioTracks().length == 1

// recording only audio
var audioRecorder = RecordRTC(stream, {
---- type: 'audio'
});

// recording audio+video
var videoRecorder = RecordRTC(stream, {
---- type: 'video'
});