MultiRoombaRover/plans/pi_mic_to_rover_video_outline.md

general idea

• the pi's microphone needs to be streamed to users
  • as part of the rover's video feed
• the pi model is a zero 2 W
  • it CANNOT handle transcoding the audio onboard, I have tried.
• the server is super powerful and can handle transcoding
• it is NOT acceptable to add more than 100ms of video latency from glass to glass
• it is NOT acceptable to break video streaming for pis that don't have microphones

OLD, BAD, but working audio configuration that worked for the microphone

-f alsa -guess_layout_max 0 -thread_queue_size 2048 -ac 1 -ar 48000 -i plughw:0,0 \
-map 1:a:0 \
-c:a libopus -b:a 24000 -compression_level 0 -application voip -frame_duration 60 \
-ac:a 1 -ar:a 48000 -af "pan=1c|c0=c0,volume=20dB"

• the raspberry pi CANNOT HANDLE AUDIO ENCODING onboard. this is just to show you how to use the mic.

sudo systemctl restart roverd #sudo systemctl restart audio-capture sudo systemctl restart video-publisher sudo cat /var/lib/roverd/video.env