Run WebRTC Native Client Momo on Raspberry Pi 3B

Goal

Download momo binary and run on Raspberry Pi 3B to see a Pi’s camera image on Host PC.

Environment

• Server: Raspberry Pi 3B
• Client: X220 (Ubuntu 18.04)
• Momo: 19.07.0-rc0

Setup Camera

• Connect a camera to Pi
• $ vcgencmd get_camera
  • supported=1 detected=1 # Should be like this

Setup Library

• $ sudo apt-get install libnspr4 libnss3
• $ sudo modprobe bcm2835-v4l2
• $ sudo vi /etc/modules
  • bcm2835-v4l2 # For Using Raspberry Pi Camera
• $ sudo reboot

Check IP address

• $ ifconfig
  • wlan0: flags=4163 mtu 1500
  • inet 10.0.0.88 netmask 255.255.255.0 broadcast 10.0.0.255

Get momo

• $ wget https://github.com/shiguredo/momo/releases/download/19.07.0-rc0/momo-19.07.0-rc0_raspbian-stretch_armv7.tar.gz
  • You can see newest version at here.
    • Raspbian Stretch ARMv7
      • For Raspberry Pi 3 B/B+
    • Raspbian Stretch ARMv6
      • For Raspberry Pi Zero W/WH
• $ tar xvzf momo-19.07.0-rc0_raspbian-stretch_armv7.tar.gz
• $ sudo rm -r momo-19.07.0-rc0_raspbian-stretch_armv7.tar.gz

Run momo

• $ cd momo-19.07.0-rc0_raspbian-stretch_armv7/
• $ ./momo --version
• WebRTC Native Client Momo version 19.07.0-rc0 USE_MMAL_ENCODER=1
• $ ./momo --help
• $ ./momo --no-audio --resolution HD --framerate 30 p2p

Acces

• Go to http://10.0.0.88:8080/html/p2p.html on Host PC
  • Select H264
  • And push Connect

Benchｍark

The delay is about 100~300msec.

momo 19.02.0

momo 19.07.0-rc0

My Note

• According to the wiki,
  • RPi 3 Model B is ARMv8-A (64/32-bit).
  • RPi zero is ARMv6Z (32-bit)
• However if we run the command on Pi 3B,
  • $ lscpu
    • Architecture: armv7l
    • Byte Order: Little Endian
    • CPU(s): 4
    • On-line CPU(s) list: 0-3
    • Thread(s) per core: 1
    • Core(s) per socket: 4
    • Socket(s): 1
    • Model: 4
    • Model name: ARMv7 Processor rev 4 (v7l)
    • CPU max MHz: 1200.0000
    • CPU min MHz: 600.0000
    • BogoMIPS: 38.40
    • Flags: half thumb fastmult vfp edsp neon vfpv3 tls vfpv4 idiva idivt vfpd32 lpae evtstrm crc32
• Which mean Pi 3B is not compatible ARMv8 yet.

Reference

• https://github.com/shiguredo/momo
• https://github.com/shiguredo/momo/blob/develop/doc/USE.md
• https://gist.github.com/voluntas/51c67d0d8ce7af9f24655cee4d7dd253
• https://en.wikipedia.org/wiki/Raspberry_Pi
• https://www.youtube.com/watch?v=9cQT4urTlXM