https://github.com/ytdl-org/youtube-dl
使用 youtube-dl 下载 1080p 高清视频 Leon Knegt Leon Knegt Aug 3, 2016 • 3 min read 请先安装 ffmpeg 以提供必要支持，详情。
安装 youtube-dl：
在 UNIX 系统上安装 (Linux, OS X, 等.)：
使用 curl 安装：
sudo curl -L https://yt-dl.org/downloads/latest/youtube-dl -o /usr/local/bin/youtube-dl sudo chmod a+rx /usr/local/bin/youtube-dl 使用 wget 安装：
sudo wget https://yt-dl.org/downloads/latest/youtube-dl -O /usr/local/bin/youtube-dl sudo chmod a+rx /usr/local/bin/youtube-dl 使用 pip 安装：
sudo pip install –upgrade youtube_dl 使用 Homebrew 安装：
brew install youtube-dl 输入下面的命令确认签名：
sudo wget https://yt-dl.org/downloads/latest/youtube-dl.sig -O youtube-dl.sig gpg –verify youtube-dl.sig /usr/local/bin/youtube-dl rm youtube-dl.sig 获得更多内容请访问项目主页。
我们以某个 MV 为例，YouTube 页面，首先看看这个视频有多少格式：
sudo youtube-dl -F https://www.youtube.com/watch?v=ECIU3SQyUU4 输出如下：
ECIU3SQyUU4: Downloading webpage ECIU3SQyUU4: Extracting video information ECIU3SQyUU4: Downloading js player do ECIU3SQyUU4: Downloading DASH manifest [info] Available formats for ECIU3SQyUU4: format code extension resolution note 171 webm audio only DASH audio , audio@128k (worst) 140 m4a audio only DASH audio , audio@128k 139 m4a audio only DASH audio 49k , audio@ 48k (22050Hz), 1.19MiB 140 m4a audio only DASH audio 129k , audio@128k (44100Hz), 3.16MiB 171 webm audio only DASH audio 132k , audio@128k (44100Hz), 3.08MiB 172 webm audio only DASH audio 191k , audio@256k (44100Hz), 4.33MiB 141 m4a audio only DASH audio 255k , audio@256k (44100Hz), 6.27MiB 160 mp4 144p DASH video , video only 278 webm 256x144 DASH video 96k , webm container, VP9, 1fps, video only, 2.14MiB 160 mp4 256x144 DASH video 111k , 13fps, video only, 2.70MiB 242 webm 240p DASH video , video only 133 mp4 240p DASH video , video only 242 webm 426x240 DASH video 223k , 1fps, video only, 4.62MiB 133 mp4 426x240 DASH video 253k , 25fps, video only, 6.00MiB 243 webm 360p DASH video , video only 134 mp4 360p DASH video , video only 243 webm 640x360 DASH video 397k , 1fps, video only, 8.30MiB 134 mp4 640x360 DASH video 620k , 25fps, video only, 13.78MiB 244 webm 480p DASH video , video only 135 mp4 480p DASH video , video only 244 webm 854x480 DASH video 798k , 1fps, video only, 16.47MiB 135 mp4 854x480 DASH video 1117k , 25fps, video only, 25.52MiB 247 webm 720p DASH video , video only 136 mp4 720p DASH video , video only 247 webm 1280x720 DASH video 1476k , 1fps, video only, 30.38MiB 136 mp4 1280x720 DASH video 2246k , 25fps, video only, 49.86MiB 248 webm 1080p DASH video , video only 137 mp4 1080p DASH video , video only 248 webm 1920x1080 DASH video 2427k , 1fps, video only, 50.28MiB 137 mp4 1920x1080 DASH video 4176k , 25fps, video only, 96.17MiB 17 3gp 176x144 36 3gp 320x240 5 flv 400x240 43 webm 640x360 18 mp4 640x360 22 mp4 1280x720 (best)
因为这是个音乐 MV，所以音质也可以选最好的，我们想下载 1080p 的 mp4 格式，注意 video 的 ID 是 137，audio 的 ID 是 141
下载的话就运行这个命令：
sudo youtube-dl -f 137+141 https://www.youtube.com/watch?v=ECIU3SQyUU4 一切正常的话，就会输出如下：
ECIU3SQyUU4: Downloading webpage ECIU3SQyUU4: Extracting video information ECIU3SQyUU4: Downloading DASH manifest [download] Destination: Alex Mica - Dalinda (Official Video)-ECIU3SQyUU4.f137.mp4 [download] 100% of 96.17MiB in 00:02 [download] Destination: Alex Mica - Dalinda (Official Video)-ECIU3SQyUU4.f141.m4a [download] 100% of 6.27MiB in 00:07 [ffmpeg] Merging formats into “Alex Mica - Dalinda (Official Video)-ECIU3SQyUU4.mp4” 然后再用迅雷 10 个线程拖回本地，速度会比你直接本地下载快多了去了，此方法只是用来学习和研究相关工具的使用，请勿下载带版权/版权争议的内容。
- yum 安装 ffmpeg
yum install -y ffmpeg
参考：