[React] 來用 canvas 截圖影片吧！

技術摘要：

video-react load video
use canvas to capture
canvas.getContext(‘2d’)
drawImage

issue:

chrome v.76 bug 第一張截圖全黑
https://support.google.com/chrome/thread/12663566?hl=en

canvas dom

https://stackoverflow.com/questions/9152224/add-canvas-to-a-page-with-javascript

feature:

1. 偵測寬高，做旋轉
2. Hevc video support:

HVC type handle

mac 10.12 後才支援 hevc

edge 至今都不支援 hevc

詳細待補…