youtube视频文件下载神器：you-get

https://github.com/soimort/you-get/releases/tag/v0.4.1500

安装：

使用：

usage: you-get [OPTION]... URL...

A tiny downloader that scrapes the web

optional arguments:
  -V, --version         Print version and exit
  -h, --help            Print this help message and exit

Dry-run options:
  (no actual downloading)

  -i, --info            Print extracted information
  -u, --url             Print extracted information with URLs
  --json                Print extracted URLs in JSON format

Download options:
  -n, --no-merge        Do not merge video parts
  --no-caption          Do not download captions (subtitles, lyrics, danmaku,
                        ...)
  -f, --force           Force overwriting existing files
  --skip-existing-file-size-check
                        Skip existing file without checking file size
  -F STREAM_ID, --format STREAM_ID
                        Set video format to STREAM_ID
  -O FILE, --output-filename FILE
                        Set output filename
  -o DIR, --output-dir DIR
                        Set output directory
  -p PLAYER, --player PLAYER
                        Stream extracted URL to a PLAYER
  -c COOKIES_FILE, --cookies COOKIES_FILE
                        Load cookies.txt or cookies.sqlite
  -t SECONDS, --timeout SECONDS
                        Set socket timeout
  -d, --debug           Show traceback and other debug info
  -I FILE, --input-file FILE
                        Read non-playlist URLs from FILE
  -P PASSWORD, --password PASSWORD
                        Set video visit password to PASSWORD
  -l, --playlist        Prefer to download a playlist
  -a, --auto-rename     Auto rename same name different files
  -k, --insecure        ignore ssl errors

Proxy options:
  -x HOST:PORT, --http-proxy HOST:PORT
                        Use an HTTP proxy for downloading
  -y HOST:PORT, --extractor-proxy HOST:PORT
                        Use an HTTP proxy for extracting only
  --no-proxy            Never use a proxy
  -s HOST:PORT or USERNAME:PASSWORD@HOST:PORT, --socks-proxy HOST:PORT or USERNAME:PASSWORD@HOST:PORT
                        Use an SOCKS5 proxy for downloading

.测试：

但是通过you-get url方式下载的视频不是很清晰，我们需要高清版本的：

通过 you-get -i  url 方式，查看itag值：

（itag值越大视频效果越好）

然后再用命令you-get -F itag值 url 下载：

嗯。下载完之后，有2个文件，

一个很小，一个很大，小的是音频，大的是视频，也就是说是把一个视频分成了2个文件。。。这时候需要使用ffmpeg将2个文件进行合成。

debian下安装ffmpeg ：

apt install ffmpeg

呃。。转码失败：

参考https://blog.csdn.net/finlone/article/details/89917264，还是报错：