With a session ID and Tokbox Inspector Redirect tool we can see how the publisher scales up and down video resolution while trying to adapt to the bandwidth available.
It is possible to know this video size from javascript?
It would be handy to let users know that video streaming quality is poor because connectivity.
OpenTok Developer Advocate here.
Using the JavaScript client SDK you have a couple things available to you:
First, on the Publisher and Subscriber, you can call getStats(completionHandler) which will give you:
Secondly, on the session you can subscribe to the sessions streamPropertyChanged event to identify when a stream has started or stopped publishing audio or video, when the video dimensions have changed or when the video type has changed.