Add support for custom go2rtc URLs.

README.md

@@ -249,7 +249,8 @@ cameras:
 | Option | Default | Overridable | Description |
 | - | - | - | - |
 | `modes` | `[webrtc, mse, mp4, mjpeg]` | :white_check_mark: | An ordered array of `go2rtc` modes to use. Valid values are `webrtc`, `mse`, `mp4` or `mjpeg` values. |
-| `stream` | Determind by camera engine (e.g. `frigate` camera name). | :white_check_mark: | A valid `go2rtc` stream name. |
+| `stream` | Determined by camera engine (e.g. `frigate` camera name). | :white_check_mark: | A valid `go2rtc` stream name. |
+| `url` | Determined by camera engine (e.g. the `frigate` engine will automatically generate a URL for the go2rtc backend that runs in the Frigate container). | :white_check_mark: | The root `go2rtc` backend URL the card should stream the video from. This will only need to be set in advanced cases -- for the vast majority of people the default will work. Example: `http://my-custom-go2rtc:1984` |
 
 #### Live Provider: Camera WebRTC Card configuration
 
@@ -1745,6 +1746,7 @@ cameras:
         - mp4
         - mjpeg
       stream: sitting_room
+      url: 'https://my.custom.go2rtc.backend'
   - camera_entity: camera.sitting_room_webrtc_card
     live_provider: webrtc_card
     webrtc_card:
@@ -1816,6 +1818,7 @@ cameras_global:
       - mp4
       - mjpeg
     stream: sitting_room
+    url: 'https://my.custom.go2rtc.backend'
   webrtc_card:
     # Arbitrary WebRTC Card options, see https://github.com/AlexxIT/WebRTC#configuration .
     entity: camera.sitting_room_rtsp