No audio for video calls

[ghjansen]

When video calling +1234, the call flow apparently happens normally except for the fact that there is no audio heard on client side.

Environment: latest Restcomm + latest Olympus 2 + XMS.

It was mentioned the possibility of this issue being related to https://github.com/RestComm/restcomm-android-sdk/issues/536#issuecomment-285644668 .

Here is the console log from chrome: 54.90.157.242-1489412808634.txt

[ghjansen]

Hi @atsakiridis Here is new data about the tests from tadhack environment. olympus-99.zip

[ghjansen]

Everything runs normally when using Firefox, but when using Chrome the issue still the same.

[ghjansen]

Chrome waits for first video frame before doing any media playback. Seems a mechanism for syncing audio & video streams.

I think until successful decoding of video frame(at least one), chrome won't start audio playback to avoid lip sync issue.

https://groups.google.com/forum/#!searchin/discuss-webrtc/no$20audio$20video%7Csort:relevance/discuss-webrtc/NGxTD3H68o0/N2GbTnyHAgAJ

[ghjansen]

Discussion related to Chrome sensitiveness for codec names:

Bug: https://bugs.chromium.org/p/webrtc/issues/detail?id=7027

Fix: https://chromium.googlesource.com/external/webrtc.git/+/c964d0b3fa6b3d7a5b51a1d4e8ebfeec56e19dc0