How to use Golang download YouTube video

by Evan Lin @Golang Taipei Meetup #49

Transcript

1. How to use Golang download YouTube video LINE Developer Relations Evan Lin 2020.05 1
2. Evan Lin • Google Developer Expert • LINE Developer Meetup • LINE TAIWAN TECHPULSE Organizer LINE Technology Evangelist 2
4. How to get Youtube Video Info? https://www.youtube.com/watch?v=rFejpH_tAHM https://youtube.com/get_video_info?video_id=rFejpH_tAHM 4
5. How to get Youtube Video Info? 5
6. RAW Data 6
7. How to parse with Query Parameter 7
8. Get Video Author and Title How to handle JSON value without structure data. 8
9. Let’s find the video download link 9
10. How to process JSON data from Web Jsonlint.com à Paste and copy on text editor à Json to Go 10
11. Using the file download link… 11
12. Using the file download link… (what?) No url??? But new ”cipher”? 12
13. Finally … https://stackoverflow.com /questions/60607291/you tube-video-downloader- with-php 13
14. Look into browser player related setting https://www.youtube.com/embed/FHpvI8oGsuQ?hl=en https://www.youtube.com/s/player/e3cd195e/player_ias.vflset/en_US/base.js 14
15. Make it simple … “string” EQ(“string”, 3) è c = ‘s’ è a[0] = a[2] = `r` è a[2] = `s` à “rtsing” 15
16. Decipher :Operation 16
17. Decipher : Parse Ops and Args https://github.com/kkdai/youtube/blob/master/decipher.go#L12 17
18. Looking for contributors 18 https://github.com/kkdai/youtube
19. LINE TECH FRESH https://engineering.linecorp.com/zh-hant/blog/tech-fresh-2020/ 19
21. Q&A 21