Language labels

Shijun pointed out that the AudioTrack instances that are played on
HTMLMediaElement have language tags.  These tags are not preserved
when capturing with .captureStream().

I realize that we also don't have a way to correlate a captured audio
track with its source track, which might offer an application the
ability to fill in this sort of information for itself.

Received on Monday, 14 September 2015 20:41:24 UTC