youtube-dl安装
安装youtube-dl
sudo curl -L https://yt-dl.org/downloads/latest/youtube-dl -o /usr/local/bin/youtube-dl
修改权限
sudo chmod a+rx /usr/local/bin/youtube-dl
# 查看视频所以转码格式
youtube-dl -F https://www.youtube.com/watch?v=WuiMJMFygAo
下载视屏 这个下载到了用户下面
youtube-dl https://www.bilibili.com/video/av53424418?spm_id_from=333.334.b_62696c695f646f756761.9
youtube-dl "https://www.youtube.com/watch?v=du9UaMd9-JI&list=PL66426CA3AA80A084" -o E:\003_video\002bilibili\000\%(title)s-%(id)s.%(ext)s
youtube-dl https://www.bilibili.com/video/av28477182 -o E:\003_video\002bilibili\001\%(title)s-%(id)s.%(ext)s
youtube-dl https://www.bilibili.com/video/av28477182 -o E:\003_video\002bilibili\001\%(title)s-%(id)s.%(ext)s
youtube-dl https://www.bilibili.com/video/av28477182
上面的可以下载b站，但是只有视屏，没有字幕，下次再弄。
https://www.jianshu.com/p/f173cd6bc7da
https://blog.csdn.net/abel_qy/article/details/51067964
b站做了资源保护
https://blog.csdn.net/jay_wonder/article/details/89365133
ffmpeg
