Streaming camera for Hamster - Using Raspberry Pi and PHP’s Swoole -

Translated in English from https://speakerdeck.com/memory1994/hamusutawojian-shi-surusisutemuwo-raspberry-pi-to-php-false-swoole-tezuo-tutahua

Transcript

1. Streaming camera for Hamster - Using Raspberry Pi and PHP’s Swoole - 04/24/2019 PHP study meetup at Tokyo In Japan memory (@m3m0r7)
2. Who am I?
3. memory (@m3m0r7) I’m a server-side and front-end engineer. I like PHP and React.js. And I’m working at an IT company in Japan.
4. What am I making recently?
5. https://github.com/php-java/php-java
7. Hamster is…
8. Lily Sex: female Birthday: 11/01/2018 Likes: biscuits and apple-tree branches Dislikes: pear-tree branches Hobby: biting at a waterer
9. Have you ever used Swoole?
10. And have you ever used Raspberry Pi?
12. Camera for daytime Camera for nighttime
13. These cameras are installed in my home.
15. It is Lily’s rack.
16. In the red frame is a Raspberry Pi
17. Technologies
18. - Raspbian (Raspberry Pi) - PHP 7.3 - Swoole v4 - Python 3 - React.js (+ Gulp) Mainly five technologies
19. How much are they?
20. - Raspberry Pi 3 Model B * 2 ≒ 5,200 * 2 ≒ 10,000 JPY - Camera modules * 2 ≒ 5,000 * 2 ≒ 10,000 JPY - VPS (ConoHa[1]) ≒ 2,500/mo JPY - Router ≒ 15,000 JPY Initial costs ≒ 37,500 JPY Running costs ≒ 2,500 JPY [1] ConoHa is a VPS service provided by GMO (Japanese IT company).
21. A little expensive here.
22. How about a latency?
23. No more than 0.5 sec.
24. The server’s architecture is…
25. My Home LAN VPS (ConoHa) PiCamera Module Four-byte size data in unsigned long + picamera.start_recording (mjpeg) Sends image data from daytime camera through TCP connections Sends Image data from night camera through TCP connections
26. What is happening in My Home LAN side?
27. - I didn’t want to expose any ports from my home - Intermediate server definitely solved this! I chose ConoHa this time. - Bought a router brand new, which is super cool :) - Sending to VPS (ConoHa) using picamera on Python 3
28. Built with high speed and stability. Supported A Wi-Fi Router Equipped with MU-MIMO Technologies High speed connections for multiple devices. Concentrated connections to destination devices by “AiRader” Technology. This Wi-Fi router is capable of delivering electromagnetic wave to the entire home because its covering area is very large.
29. What is happening in the VPS side?
30. - By using Coroutines on PHP's Swoole, I made an inbound server for Raspberry Pi, and an outbound server for sending to ConoHa - That’s it! Simple is best.
31. * Some part of codes
32. Production screen is…
34. Test for streaming plays
35. How did I do this?
36. Wave hands beneath the cameras.
38. - mjpeg stands for Motion JPEG. - I have also investigated H.264 but its latency increases by 5 sec via ffmpeg. Thus, I chose mjpeg. - Keeps connected in MIME type multipart/x-mixed-replace. - (The browser continuously indicates the page is being loaded) - Latency appears to be roughly 0.5 sec - Renders smoothly.
39. My impressions for Swoole
40. - Amazing async processing in PHP! - Relatively easy to install because of unnecessity of --enable-maintainer- zts when building. - I pray to Swoole so Atomic can accept at least serializable values. - I’m using Channel instead of Atomic.
41. Problems are…
42. The script crashes 2 days later.
43. I don’t know how to resolve it:
 I don’t record any logs ʗ(^o^)ʘ
44. Finish
45. THANK YOU FOR YOUR LISTENING!!