HAP-python | python implementation of the HomeKit Accessory Protocol

As of version 3.5.1, HAP-python no longer supports python older than 3.6, because we are moving to asyncio. If your platform does not have a compatible python out of the box, you can install it manually or just use an older version of HAP-python.
The Camera accessory implements the HomeKit Protocol for negotiating stream settings, such as the picture width and height, number of audio channels and others. Starting a video and/or audio stream is very platform specific. Because of this, you need to figure out what video and audio settings your camera supports and set them in the options parameter that is passed to the Camera Accessory. Refer to the documentation for the Camera contructor for the settings you need to specify. By default, HAP-python will execute the ffmpeg command with the negotiated parameters when the stream should be started and will terminate the started process when the stream should be stopped (see the default: Camera.FFMPEG_CMD). If the default command is not supported or correctly formatted for your platform, the streaming can fail.
Pass your own command that will be executed when the stream should be started. You pass the command as a value to the key start_stream_cmd in the options parameter to the constuctor of the Camera Accessory. The command is formatted using the negotiated stream configuration parameters. For example, if the negotiated width is 640 and you pass foo start -width {width}, the command will be formatted as foo start -width 640. The full list of negotiated stream configuration parameters can be found in the documentation for the Camera.start method.
Implement your own logic to start, stop and reconfigure the stream. If you need more flexibility in managing streams, you can directly implement the Camera methods start, stop and reconfigure. Each will be called when the stream should be respectively started, stopped or reconfigured. The start and reconfigure methods are given the negotiated stream configuration parameters. Have a look at the documentation of these methods for more information.