there is probably no such complex. but a start would be https://github.com/nischi/MMM-Face-Reco-DNN

does anyone have any idea how to trigger sound output with the Assitantmk2?

Can you trigger a sound output from a recipe while the Assistantmk2 is active?
For me sound output only works when the assistant is not active e.g. when I trigger sound output via web service (e.g. MMM-Sound or MMM-Text-To-Speech).
My use case is:
A recipe that listens to “mirror mirror on the wall” and then either plays an mp3 / wav or speak TTS

try set locale or forceLocalTZ like:

config: {
		locale			: "de_DE",
		forceLocalTZ	: true,

have the same problem.did you solve it?

Yes this is a real problem with the display and controller.
Try to contact a controller seller on eBay (e.g. https://www.ebay.de/usr/csmqshop) and give them your display number. With luck, he could help you.

How can I stop a video?
config is

youtubeAutoplay	: true,
pauseOnYoutube : false,

But it does not help.

works with

		{
			module: "MMM-RTSPStream",
			position: "middle_center",
			config: {
				autoStart			: true,
				rotateStreams		: false,
				rotateStreamTimeout	: 30,
				moduleWidth			: 354,
				moduleHeight		: 240,
				localPlayer			: 'omxplayer',
				shutdownDelay		: 0,

					stream1: {
						name: 'Test Stream',
						url: 'file:///home/pi/MagicMirror/modules/MMM-RTSPStream/Videos/Feuer.mp4',
					},
				}
		},

but no sound !

in bash console works with: omxplayer -o alsa Feuer.mp4
How to set hdmi sound as default ?

Is it possible to define a stream for playing a local file (e.g. .mp4 or .avi)?

thank you but wont work also.
Error:
ReferenceError: $ is not defined at loadJSON

I want to have all API keys and passwords from a common location and not scattered in the config.js, Hence the thought with a (yml) file.
maybe this can be solved via an array variable in the config.js or similar.