* Serialize snapshot commands and bump amcrest package to 1.2.4
Attempting to send a snapshot command when a previous one hasn't finished will result in warnings and/or errors. This can happen when the camera picture is clicked on in the frontend, resulting in the thread that updates the thumbnail in the background every 10 seconds to sometimes collide with the thread that updates the large picture in the foreground quickly. An automation that calls the camera.snapshot service in yet another thread can make the situation worse. Fix by adding a thread lock to serialize snapshot commands. Also bump the amcrest package to 1.2.4 which fixes error handling in the command method and improves performance by reusing requests sessions.
* Update amcrest package to 1.2.4
* Add ffmpeg version
* Add ffmpeg stream content type
* Change ffmpeg camera stream content type
* Change ffmpeg stream content type
* Lint
* Add a none guard
* Fix
* Fix
* Update onvif.py
* Fix version match regrex
* Fix regrex
* Upgrade ha-ffmpeg to 1.11
* Lint
* Get ffmpeg version in ffmpeg component setup
Phil Bruckner
Daniel Shokouhi
Fabian Affolter
Jason Hu
Paulus Schoutsen