Public bug reported:

When a web site uses WebRTC for video conferencing the webbrowser-app
accesses the rear camera by default. The user can switch cameras via
Settings -> Privacy & permissions -> Camera & Microphone. Unfortunately,
changing this setting doesn't immediately have effect on the open web
page. You have to reload the page first, which is not intuitive.

Tested / discovered with bq Aquaris E5 Ubuntu Edition, OTA-9.1 (vegeta,
latest stable as of today).

Additional question: How can switching cameras be handled in web apps
(driven by the webapp-container binary)? The webapp-container does
neither provide a feature to specify a (different) default camera nor an
interactive possibility to do so. An API call to switch cameras would be
awesome.

Expected Behavior
-----------------

- Switching cameras via the settings immediately has effect on the camera used 
by web sites open in the webbrowser-app.
- Specifying a default camera (startup settings) is available with the 
webapp-container binary.
- Switching cameras programmatically (via an API call) and/or interactively is 
possible in web apps driven by the webapp-container.

How to Reproduce
----------------

1.) Go to e.g. https://appear.in/test-drive on your Ubuntu phone (default 
webbrowser-app)
2.) When prompted for "Allow this domain access the camera and microphone" 
choose "Yes"
3.) Click away the chat window (touch the down-arrow at right lower corner)
4.) Touch the screen to dismiss the "help text" (the video captured by the rear 
camera is shown)
5.) In the browser address bar got to Menu -> Settings -> Privacy & permissions 
-> Camera & Microphone, and switch to the front camera; go out of the menu 
going back the hierarchy; the rear camera video is still shown 
6.) Tap the address bar, tap on the "Reload" icon to reload the page; the front 
camera video is finally shown

Other Details
-------------

- https://github.com/bittner/appear-in/issues/1 (conversion
demonstrating users are confused about browser behavior)

** Affects: webbrowser-app (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: camera settings usability webapp-container webrtc

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https://bugs.launchpad.net/bugs/1554244

Title:
  Switching cameras requires web page reload in webbrowser-app, not
  available in webapp-container

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