Streaming audio from ezviz camera to Google Home speaker

Hi,
I have an ezviz C1C camera, which is streaming rtsp… I can use it as a baby monitor through VLC on my PC with speakers, but I’d like to do the same on my google home speaker.
I tried to call the camera.play_stream using the google home media player entity as a target, but I can only hear it play a brief “ding” sound and then nothing else. The status of the media player remains “idle”.
I think it doesn’t like me sending a video stream to a speaker…
Is it maybe possible with the ffmpeg component?

thanks