On 1/9/2018 10:09 AM, Alexander Abagian wrote:
I see in the code that it could be enabled by the command line flag similar to 
Chrome. The question rest is how to be sure that multiple layers are turned on ?

We do not have a command-line flag similar to chrome; you might be confused by imported code from webrtc.org that we don't actually use (such as webrtcvideoengine2.cc)


We use almost nothing from media/webrtc/trunk/webrtc/media - just base/video{adapter/broadcaster/sourcebase}.*

We do set vp9 spatial layers for screencasts to 2 (in media/webrtc/signaling/src/media-conduit/VideoConduit.cpp -- apparently this is required by webrtc.org for screencasts), or to the number of spatial layers set in about:config in media.peerconnection.video.svc.spatial (default 1).  We have a pref for vp9 temporal layers, but no code that uses it yet.  Those prefs are for experimenting with vp9 SVC.

   Randell Jesup, Mozilla
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