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RaspbianでコマンドラインからYoutubeの動画や音声をダウンロードするyoutube-dl

 URLさえわかればコマンド一発。

対象環境

方法

  1. インストール
  2. バージョン確認
  3. 使ってみる

1. インストール

$ 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

2. バージョン確認

$ youtube-dl --version
2018.09.26

3. 使ってみる

$ youtube-dl 任意YoutubeのURL

 ファイル形式はwebmだった。

動画形式

 -f(--format)オプションで値を指定すると以下のようになる。

-f 形式 サイズ
37 mp4 1080x1920
46 webm 1080x1920
22 mp4 720x1280
45 webm 720x1280
35 flv 480x854
44 webm 480x854
34 flv 360x640
18 mp4 360x640
43 webm 360x640
5 flv 240x400
17 mp4 144x176
  Video Format Options:
    -f, --format FORMAT              Video format code, see the "FORMAT
                                     SELECTION" for all the info
  Post-processing Options:
...
    --recode-video FORMAT            Encode the video to another format if
                                     necessary (currently supported:
                                     mp4|flv|ogg|webm|mkv|avi)

音声のみ

 -xオプション。

$ youtube-dl -x 任意YoutubeのURL

音声形式

 --audio-formatオプション。

$ youtube-dl -x --audio-format mp3 任意YoutubeのURL

 品質は5(128K)、形式は"best"(アップロード形式そのまま?)がデフォルト。

  Post-processing Options:
    --audio-format FORMAT            Specify audio format: "best", "aac",
                                     "flac", "mp3", "m4a", "opus", "vorbis",
                                     or "wav"; "best" by default; No effect
                                     without -x
    --audio-quality QUALITY          Specify ffmpeg/avconv audio quality,
                                     insert a value between 0 (better) and 9
                                     (worse) for VBR or a specific bitrate
                                     like 128K (default 5)

 以下のようにすれば最高音質だと思ったが、-xのみのときとファイルサイズが変わらなかった。

$ /home/pi/root/tool/youtube-dl -x --audio-quality 0 --audio-format best 任意YoutubeのURL

字幕のみ

$ youtube-dl --all-subs --skip-download 任意YoutubeのURL

プレイリスト全体

$ youtube-dl -cit 任意プレイリストのURL

情報源

ヘルプ

$ /home/pi/root/tool/youtube-dl --help
Usage: youtube-dl [OPTIONS] URL [URL...]

Options:
  General Options:
    -h, --help                       Print this help text and exit
    --version                        Print program version and exit
    -U, --update                     Update this program to latest version.
                                     Make sure that you have sufficient
                                     permissions (run with sudo if needed)
    -i, --ignore-errors              Continue on download errors, for example
                                     to skip unavailable videos in a playlist
    --abort-on-error                 Abort downloading of further videos (in
                                     the playlist or the command line) if an
                                     error occurs
    --dump-user-agent                Display the current browser
                                     identification
    --list-extractors                List all supported extractors
    --extractor-descriptions         Output descriptions of all supported
                                     extractors
    --force-generic-extractor        Force extraction to use the generic
                                     extractor
    --default-search PREFIX          Use this prefix for unqualified URLs. For
                                     example "gvsearch2:" downloads two videos
                                     from google videos for youtube-dl "large
                                     apple". Use the value "auto" to let
                                     youtube-dl guess ("auto_warning" to emit
                                     a warning when guessing). "error" just
                                     throws an error. The default value
                                     "fixup_error" repairs broken URLs, but
                                     emits an error if this is not possible
                                     instead of searching.
    --ignore-config                  Do not read configuration files. When
                                     given in the global configuration file
                                     /etc/youtube-dl.conf: Do not read the
                                     user configuration in ~/.config/youtube-
                                     dl/config (%APPDATA%/youtube-
                                     dl/config.txt on Windows)
    --config-location PATH           Location of the configuration file;
                                     either the path to the config or its
                                     containing directory.
    --flat-playlist                  Do not extract the videos of a playlist,
                                     only list them.
    --mark-watched                   Mark videos watched (YouTube only)
    --no-mark-watched                Do not mark videos watched (YouTube only)
    --no-color                       Do not emit color codes in output

  Network Options:
    --proxy URL                      Use the specified HTTP/HTTPS/SOCKS proxy.
                                     To enable SOCKS proxy, specify a proper
                                     scheme. For example
                                     socks5://127.0.0.1:1080/. Pass in an
                                     empty string (--proxy "") for direct
                                     connection
    --socket-timeout SECONDS         Time to wait before giving up, in seconds
    --source-address IP              Client-side IP address to bind to
    -4, --force-ipv4                 Make all connections via IPv4
    -6, --force-ipv6                 Make all connections via IPv6

  Geo Restriction:
    --geo-verification-proxy URL     Use this proxy to verify the IP address
                                     for some geo-restricted sites. The
                                     default proxy specified by --proxy (or
                                     none, if the option is not present) is
                                     used for the actual downloading.
    --geo-bypass                     Bypass geographic restriction via faking
                                     X-Forwarded-For HTTP header
    --no-geo-bypass                  Do not bypass geographic restriction via
                                     faking X-Forwarded-For HTTP header
    --geo-bypass-country CODE        Force bypass geographic restriction with
                                     explicitly provided two-letter ISO 3166-2
                                     country code
    --geo-bypass-ip-block IP_BLOCK   Force bypass geographic restriction with
                                     explicitly provided IP block in CIDR
                                     notation

  Video Selection:
    --playlist-start NUMBER          Playlist video to start at (default is 1)
    --playlist-end NUMBER            Playlist video to end at (default is
                                     last)
    --playlist-items ITEM_SPEC       Playlist video items to download. Specify
                                     indices of the videos in the playlist
                                     separated by commas like: "--playlist-
                                     items 1,2,5,8" if you want to download
                                     videos indexed 1, 2, 5, 8 in the
                                     playlist. You can specify range:
                                     "--playlist-items 1-3,7,10-13", it will
                                     download the videos at index 1, 2, 3, 7,
                                     10, 11, 12 and 13.
    --match-title REGEX              Download only matching titles (regex or
                                     caseless sub-string)
    --reject-title REGEX             Skip download for matching titles (regex
                                     or caseless sub-string)
    --max-downloads NUMBER           Abort after downloading NUMBER files
    --min-filesize SIZE              Do not download any videos smaller than
                                     SIZE (e.g. 50k or 44.6m)
    --max-filesize SIZE              Do not download any videos larger than
                                     SIZE (e.g. 50k or 44.6m)
    --date DATE                      Download only videos uploaded in this
                                     date
    --datebefore DATE                Download only videos uploaded on or
                                     before this date (i.e. inclusive)
    --dateafter DATE                 Download only videos uploaded on or after
                                     this date (i.e. inclusive)
    --min-views COUNT                Do not download any videos with less than
                                     COUNT views
    --max-views COUNT                Do not download any videos with more than
                                     COUNT views
    --match-filter FILTER            Generic video filter. Specify any key
                                     (see the "OUTPUT TEMPLATE" for a list of
                                     available keys) to match if the key is
                                     present, !key to check if the key is not
                                     present, key > NUMBER (like
                                     "comment_count > 12", also works with >=,
                                     <, <=, !=, =) to compare against a
                                     number, key = 'LITERAL' (like "uploader =
                                     'Mike Smith'", also works with !=) to
                                     match against a string literal and & to
                                     require multiple matches. Values which
                                     are not known are excluded unless you put
                                     a question mark (?) after the operator.
                                     For example, to only match videos that
                                     have been liked more than 100 times and
                                     disliked less than 50 times (or the
                                     dislike functionality is not available at
                                     the given service), but who also have a
                                     description, use --match-filter
                                     "like_count > 100 & dislike_count <? 50 &
                                     description" .
    --no-playlist                    Download only the video, if the URL
                                     refers to a video and a playlist.
    --yes-playlist                   Download the playlist, if the URL refers
                                     to a video and a playlist.
    --age-limit YEARS                Download only videos suitable for the
                                     given age
    --download-archive FILE          Download only videos not listed in the
                                     archive file. Record the IDs of all
                                     downloaded videos in it.
    --include-ads                    Download advertisements as well
                                     (experimental)

  Download Options:
    -r, --limit-rate RATE            Maximum download rate in bytes per second
                                     (e.g. 50K or 4.2M)
    -R, --retries RETRIES            Number of retries (default is 10), or
                                     "infinite".
    --fragment-retries RETRIES       Number of retries for a fragment (default
                                     is 10), or "infinite" (DASH, hlsnative
                                     and ISM)
    --skip-unavailable-fragments     Skip unavailable fragments (DASH,
                                     hlsnative and ISM)
    --abort-on-unavailable-fragment  Abort downloading when some fragment is
                                     not available
    --keep-fragments                 Keep downloaded fragments on disk after
                                     downloading is finished; fragments are
                                     erased by default
    --buffer-size SIZE               Size of download buffer (e.g. 1024 or
                                     16K) (default is 1024)
    --no-resize-buffer               Do not automatically adjust the buffer
                                     size. By default, the buffer size is
                                     automatically resized from an initial
                                     value of SIZE.
    --http-chunk-size SIZE           Size of a chunk for chunk-based HTTP
                                     downloading (e.g. 10485760 or 10M)
                                     (default is disabled). May be useful for
                                     bypassing bandwidth throttling imposed by
                                     a webserver (experimental)
    --playlist-reverse               Download playlist videos in reverse order
    --playlist-random                Download playlist videos in random order
    --xattr-set-filesize             Set file xattribute ytdl.filesize with
                                     expected file size
    --hls-prefer-native              Use the native HLS downloader instead of
                                     ffmpeg
    --hls-prefer-ffmpeg              Use ffmpeg instead of the native HLS
                                     downloader
    --hls-use-mpegts                 Use the mpegts container for HLS videos,
                                     allowing to play the video while
                                     downloading (some players may not be able
                                     to play it)
    --external-downloader COMMAND    Use the specified external downloader.
                                     Currently supports aria2c,avconv,axel,cur
                                     l,ffmpeg,httpie,wget
    --external-downloader-args ARGS  Give these arguments to the external
                                     downloader

  Filesystem Options:
    -a, --batch-file FILE            File containing URLs to download ('-' for
                                     stdin), one URL per line. Lines starting
                                     with '#', ';' or ']' are considered as
                                     comments and ignored.
    --id                             Use only video ID in file name
    -o, --output TEMPLATE            Output filename template, see the "OUTPUT
                                     TEMPLATE" for all the info
    --autonumber-start NUMBER        Specify the start value for
                                     %(autonumber)s (default is 1)
    --restrict-filenames             Restrict filenames to only ASCII
                                     characters, and avoid "&" and spaces in
                                     filenames
    -w, --no-overwrites              Do not overwrite files
    -c, --continue                   Force resume of partially downloaded
                                     files. By default, youtube-dl will resume
                                     downloads if possible.
    --no-continue                    Do not resume partially downloaded files
                                     (restart from beginning)
    --no-part                        Do not use .part files - write directly
                                     into output file
    --no-mtime                       Do not use the Last-modified header to
                                     set the file modification time
    --write-description              Write video description to a .description
                                     file
    --write-info-json                Write video metadata to a .info.json file
    --write-annotations              Write video annotations to a
                                     .annotations.xml file
    --load-info-json FILE            JSON file containing the video
                                     information (created with the "--write-
                                     info-json" option)
    --cookies FILE                   File to read cookies from and dump cookie
                                     jar in
    --cache-dir DIR                  Location in the filesystem where youtube-
                                     dl can store some downloaded information
                                     permanently. By default $XDG_CACHE_HOME
                                     /youtube-dl or ~/.cache/youtube-dl . At
                                     the moment, only YouTube player files
                                     (for videos with obfuscated signatures)
                                     are cached, but that may change.
    --no-cache-dir                   Disable filesystem caching
    --rm-cache-dir                   Delete all filesystem cache files

  Thumbnail images:
    --write-thumbnail                Write thumbnail image to disk
    --write-all-thumbnails           Write all thumbnail image formats to disk
    --list-thumbnails                Simulate and list all available thumbnail
                                     formats

  Verbosity / Simulation Options:
    -q, --quiet                      Activate quiet mode
    --no-warnings                    Ignore warnings
    -s, --simulate                   Do not download the video and do not
                                     write anything to disk
    --skip-download                  Do not download the video
    -g, --get-url                    Simulate, quiet but print URL
    -e, --get-title                  Simulate, quiet but print title
    --get-id                         Simulate, quiet but print id
    --get-thumbnail                  Simulate, quiet but print thumbnail URL
    --get-description                Simulate, quiet but print video
                                     description
    --get-duration                   Simulate, quiet but print video length
    --get-filename                   Simulate, quiet but print output filename
    --get-format                     Simulate, quiet but print output format
    -j, --dump-json                  Simulate, quiet but print JSON
                                     information. See the "OUTPUT TEMPLATE"
                                     for a description of available keys.
    -J, --dump-single-json           Simulate, quiet but print JSON
                                     information for each command-line
                                     argument. If the URL refers to a
                                     playlist, dump the whole playlist
                                     information in a single line.
    --print-json                     Be quiet and print the video information
                                     as JSON (video is still being
                                     downloaded).
    --newline                        Output progress bar as new lines
    --no-progress                    Do not print progress bar
    --console-title                  Display progress in console titlebar
    -v, --verbose                    Print various debugging information
    --dump-pages                     Print downloaded pages encoded using
                                     base64 to debug problems (very verbose)
    --write-pages                    Write downloaded intermediary pages to
                                     files in the current directory to debug
                                     problems
    --print-traffic                  Display sent and read HTTP traffic
    -C, --call-home                  Contact the youtube-dl server for
                                     debugging
    --no-call-home                   Do NOT contact the youtube-dl server for
                                     debugging

  Workarounds:
    --encoding ENCODING              Force the specified encoding
                                     (experimental)
    --no-check-certificate           Suppress HTTPS certificate validation
    --prefer-insecure                Use an unencrypted connection to retrieve
                                     information about the video. (Currently
                                     supported only for YouTube)
    --user-agent UA                  Specify a custom user agent
    --referer URL                    Specify a custom referer, use if the
                                     video access is restricted to one domain
    --add-header FIELD:VALUE         Specify a custom HTTP header and its
                                     value, separated by a colon ':'. You can
                                     use this option multiple times
    --bidi-workaround                Work around terminals that lack
                                     bidirectional text support. Requires
                                     bidiv or fribidi executable in PATH
    --sleep-interval SECONDS         Number of seconds to sleep before each
                                     download when used alone or a lower bound
                                     of a range for randomized sleep before
                                     each download (minimum possible number of
                                     seconds to sleep) when used along with
                                     --max-sleep-interval.
    --max-sleep-interval SECONDS     Upper bound of a range for randomized
                                     sleep before each download (maximum
                                     possible number of seconds to sleep).
                                     Must only be used along with --min-sleep-
                                     interval.

  Video Format Options:
    -f, --format FORMAT              Video format code, see the "FORMAT
                                     SELECTION" for all the info
    --all-formats                    Download all available video formats
    --prefer-free-formats            Prefer free video formats unless a
                                     specific one is requested
    -F, --list-formats               List all available formats of requested
                                     videos
    --youtube-skip-dash-manifest     Do not download the DASH manifests and
                                     related data on YouTube videos
    --merge-output-format FORMAT     If a merge is required (e.g.
                                     bestvideo+bestaudio), output to given
                                     container format. One of mkv, mp4, ogg,
                                     webm, flv. Ignored if no merge is
                                     required

  Subtitle Options:
    --write-sub                      Write subtitle file
    --write-auto-sub                 Write automatically generated subtitle
                                     file (YouTube only)
    --all-subs                       Download all the available subtitles of
                                     the video
    --list-subs                      List all available subtitles for the
                                     video
    --sub-format FORMAT              Subtitle format, accepts formats
                                     preference, for example: "srt" or
                                     "ass/srt/best"
    --sub-lang LANGS                 Languages of the subtitles to download
                                     (optional) separated by commas, use
                                     --list-subs for available language tags

  Authentication Options:
    -u, --username USERNAME          Login with this account ID
    -p, --password PASSWORD          Account password. If this option is left
                                     out, youtube-dl will ask interactively.
    -2, --twofactor TWOFACTOR        Two-factor authentication code
    -n, --netrc                      Use .netrc authentication data
    --video-password PASSWORD        Video password (vimeo, smotri, youku)

  Adobe Pass Options:
    --ap-mso MSO                     Adobe Pass multiple-system operator (TV
                                     provider) identifier, use --ap-list-mso
                                     for a list of available MSOs
    --ap-username USERNAME           Multiple-system operator account login
    --ap-password PASSWORD           Multiple-system operator account
                                     password. If this option is left out,
                                     youtube-dl will ask interactively.
    --ap-list-mso                    List all supported multiple-system
                                     operators

  Post-processing Options:
    -x, --extract-audio              Convert video files to audio-only files
                                     (requires ffmpeg or avconv and ffprobe or
                                     avprobe)
    --audio-format FORMAT            Specify audio format: "best", "aac",
                                     "flac", "mp3", "m4a", "opus", "vorbis",
                                     or "wav"; "best" by default; No effect
                                     without -x
    --audio-quality QUALITY          Specify ffmpeg/avconv audio quality,
                                     insert a value between 0 (better) and 9
                                     (worse) for VBR or a specific bitrate
                                     like 128K (default 5)
    --recode-video FORMAT            Encode the video to another format if
                                     necessary (currently supported:
                                     mp4|flv|ogg|webm|mkv|avi)
    --postprocessor-args ARGS        Give these arguments to the postprocessor
    -k, --keep-video                 Keep the video file on disk after the
                                     post-processing; the video is erased by
                                     default
    --no-post-overwrites             Do not overwrite post-processed files;
                                     the post-processed files are overwritten
                                     by default
    --embed-subs                     Embed subtitles in the video (only for
                                     mp4, webm and mkv videos)
    --embed-thumbnail                Embed thumbnail in the audio as cover art
    --add-metadata                   Write metadata to the video file
    --metadata-from-title FORMAT     Parse additional metadata like song title
                                     / artist from the video title. The format
                                     syntax is the same as --output. Regular
                                     expression with named capture groups may
                                     also be used. The parsed parameters
                                     replace existing values. Example:
                                     --metadata-from-title "%(artist)s -
                                     %(title)s" matches a title like "Coldplay
                                     - Paradise". Example (regex): --metadata-
                                     from-title "(?P<artist>.+?) -
                                     (?P<title>.+)"
    --xattrs                         Write metadata to the video file's xattrs
                                     (using dublin core and xdg standards)
    --fixup POLICY                   Automatically correct known faults of the
                                     file. One of never (do nothing), warn
                                     (only emit a warning), detect_or_warn
                                     (the default; fix file if we can, warn
                                     otherwise)
    --prefer-avconv                  Prefer avconv over ffmpeg for running the
                                     postprocessors
    --prefer-ffmpeg                  Prefer ffmpeg over avconv for running the
                                     postprocessors (default)
    --ffmpeg-location PATH           Location of the ffmpeg/avconv binary;
                                     either the path to the binary or its
                                     containing directory.
    --exec CMD                       Execute a command on the file after
                                     downloading, similar to find's -exec
                                     syntax. Example: --exec 'adb push {}
                                     /sdcard/Music/ && rm {}'
    --convert-subs FORMAT            Convert the subtitles to other format
                                     (currently supported: srt|ass|vtt|lrc)