* Change the API boundary between stream and camera
Shift more of the stream lifecycle management to the camera. The motivation is to support stream urls that expire
giving the camera the ability to change the stream once it is created.
* Document stream lifecycle and simplify stream/camera interaction
* Reorder create_stream function to reduce diffs
* Increase test coverage for camera_sdm.py
* Fix ffmpeg typo.
* Add a stream identifier for each stream, managed by camera
* Remove stream record service
* Update homeassistant/components/stream/__init__.py
Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>
* Unroll changes to Stream interface back into camera component
* Fix preload stream to actually start the background worker
* Reduce unncessary diffs for readability
* Remove redundant camera stream start code
Co-authored-by: Paulus Schoutsen <paulus@home-assistant.io>
* Clean up demo camera
* Complete test_motion_detection
* Clean up image reading
* Clean up camera integration async methods
* Fix and clean camera integration tests
* Fix image processing patch
* Store last working HTTP settings
* Add safe mode
* Fix tests
* Add cloud to safe mode
* Update logging text
* Fix camera tests leaving files behind
* Make emulated_hue tests not leave files behind
* Make logbook tests not leave files behind
* Make tts tests not leave files behind
* Make image_processing tests not leave files behind
* Make manual_mqtt tests not leave files behind
* initial commit for camera preferences and preload stream
* cleanup and add tests
* respect camera preferences on each request stream call
* return the new prefs after update
* initial commit of streams
* refactor stream component
* refactor so stream formats are not considered a platform
* initial test and minor refactor
* fix linting
* update requirements
* need av in tests as well
* fix import in class def vs method
* fix travis and docker builds
* address code review comments
* fix logger, add stream start/stop logs, listen to HASS stop
* address additional code review comments
* beef up tests
* fix tests
* fix lint
* add stream_source to onvif camera
* address pr comments
* add keepalive to camera play_stream service
* remove keepalive and move import
* implement registry and have output provider remove itself from stream after idle, set libav log level to error
## Description:
More fixes flagged by pylint 2 that don't hurt to have before the actual pylint 2 upgrade (which I'll submit soon).
## Checklist:
- [ ] The code change is tested and works locally.
- [x] Local tests pass with `tox`. **Your PR cannot be merged unless tests pass**