Feature Request: Stream on battery operated cameras

[johannijs]

Is your feature request related to a problem? Please describe.
no streaming possible from battery operated camera's

Describe the solution you'd like
i was thinking if it's possible to extract the c420 camera steam through google home.
Since I can ask google to play my camera stream on the google-hub, there must be a way to trick
tapo that home assistant is a google cast device?

Describe alternatives you've considered
none possible

Additional context
only tested on C420, hit maybe works on the doorbell?

[JurajNyiri]

This should be possible locally by:

• using the same functionality as we use for downloading recordings but request stream instead
• also since it is a child device, some more changes to request child device stream instead of main hub device
• expose the stream to ha via ffmpeg

This would most likely kill the battery life so we would need to optimise it and do it on demand.

I do not own battery operated camera so we would need help here.

[fedefreue]

I have a C420 and can look into it. @JurajNyiri, is your thinking that we'd add a new function in the entity that pulls the request stream in a similar way as we pull a recording? I think we'd have to trick the camera to 'exit battery saver mode' and likely limit the request to 30 seconds (or some arbitrary time) so we protect the battery but also ensure the stream starts before we display.

[JurajNyiri]

We will need to pass the stream into ffmpeg binary which would pass it to ha similarly like how is it done currently if stream functionality is disabled. As for the battery maybe we just return stream if user requires it? I am not sure if we can detect that we will need to test that.