"Un"mirror Preview

[ax3l]

Is your feature request related to a problem? Please describe.
When using the rear-side camera of a smartphone or streaming from a Linux loopback video device the preview video should not be mirrored.

Describe the solution you'd like
Potentially add a button to "un"mirror the preview :)
Maybe there is also an idiomatic way to find a good default for a video source (front-facing or not).

Describe alternatives you've considered
I tried not to watch the preview.

Additional context
The same thing will be needed for screen sharing #17

[janlelis]

Right. Automatic detection would be awesome, but we can't be sure to always detect this properly. I am thinking in the direction of an option in the join-room dialog…

[farao]

or a flip button on the video?

[janlelis]

or a flip button on the video?

I am rather hesitant to add new buttons, and it is something you usually don't need to switch during the call

[ax3l]

But one has to switch it during a call with a smartphone: "hey, let me show you my new flat / bread in my oven / BBQ / garden project real quick" - switch from front to back camera - "ui, confusing, the preview is still mirrored" - show around - switch back to front camera.

I think at the moment one selects a camera, one could make the section (default: mirrored).

Either way, on connection works, too. Then people have to refresh the currently active window to reconfigure.