UserAgent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:64.0) Gecko/20100101 Firefox/64.0

Steps to reproduce the problem:
0. open attached html file
1. start transceiver audio
2. audioLevels are both 0
3. reload
4.start track audio
5. audioLevels differ

What is the expected behavior?
audioLevel should not be zero in standard and legacy api both when using transceiver api and track api

What went wrong?
WebRTC Stats audioLevel only work when using addTrack in legacy stats api (only legacy, not standard stats), not when using transceiver API (neither legacy nor standard stats).
AudioLevel stays zero.

AddTrack + Legacy => works
AddTrack + Standard => stays zero

AddTransceiver + Legacy => stays zero
AddTransceiver + Standard => stays zero

Did this work before? N/A 

Does this work in other browsers? N/A

Chrome version: 73.0.3664.3 (Official Build) dev (64-bit)  Channel: stable
OS Version: 18.04
Flash Version:
 

Deleted: audioLevelBug.html 4.9 KB

audioLevelBug.html 4.9 KB View Download