Homebrewでyoutube-dlをインストールする。
そして
[bash]youtube-dl –extract-audio –audio-format mp3 –audio-quality 0 youtubeのURL[/bash]
それだけ。オプションは下記のとおり。いろいろやれる。
[bash]
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 and the URLs they would handle
–extractor-descriptions Output descriptions of all supported extractors
–proxy URL Use the specified HTTP/HTTPS proxy. Pass in an empty string (–proxy "") for direct connection
–socket-timeout None Time to wait before giving up, in seconds
–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.conf
(%APPDATA%/youtube-dl/config.txt on Windows)
Video Selection:
–playlist-start NUMBER playlist video to start at (default is 1)
–playlist-end NUMBER playlist video to end at (default is last)
–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
–no-playlist download only the currently playing video
–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)
–youtube-include-dash-manifest Try to download the DASH manifest on YouTube videos (experimental)
Download Options:
-r, –rate-limit LIMIT maximum download rate in bytes per second (e.g. 50K or 4.2M)
-R, –retries RETRIES number of retries (default is 10)
–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.
Filesystem Options:
-a, –batch-file FILE file containing URLs to download (‘-‘ for stdin)
–id use only video ID in file name
-A, –auto-number number downloaded files starting from 00000
-o, –output TEMPLATE output filename template. Use %(title)s to get the title, %(uploader)s for the uploader name, %(uploader_id)s for the uploader nickname if different, %(autonumber)s
to get an automatically incremented number, %(ext)s for the filename extension, %(format)s for the format description (like "22 – 1280×720" or "HD"), %(format_id)s
for the unique id of the format (like Youtube’s itags: "137"), %(upload_date)s for the upload date (YYYYMMDD), %(extractor)s for the provider (youtube, metacafe,
etc), %(id)s for the video id, %(playlist)s for the playlist the video is in, %(playlist_index)s for the position in the playlist and %% for a literal percent.
%(height)s and %(width)s for the width and height of the video format. %(resolution)s for a textual description of the resolution of the video format. Use – to output
to stdout. Can also be used to download to a different directory, for example with -o ‘/my/downloads/%(uploader)s/%(title)s-%(id)s.%(ext)s’ .
–autonumber-size NUMBER Specifies the number of digits in %(autonumber)s when it is present in output filename template or –auto-number option is given
–restrict-filenames Restrict filenames to only ASCII characters, and avoid "&" and spaces in filenames
-t, –title [deprecated] use title in file name (default)
-l, –literal [deprecated] alias of –title
-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
–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 .annotation file
–write-thumbnail write thumbnail image to disk
–load-info FILE json file containing the video information (created with the "–write-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
Verbosity / Simulation Options:
-q, –quiet activates 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 –output for a description of available keys.
–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-intermediate-pages print downloaded pages 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
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 REF 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
Video Format Options:
-f, –format FORMAT video format code, specify the order of preference using slashes: "-f 22/17/18". "-f mp4" and "-f flv" are also supported. You can also use the special names "best",
"bestvideo", "bestaudio", "worst", "worstvideo" and "worstaudio". By default, youtube-dl will pick the best quality.
–all-formats download all available video formats
–prefer-free-formats prefer free video formats unless a specific one is requested
–max-quality FORMAT highest quality format to download
-F, –list-formats list all available formats
Subtitle Options:
–write-sub write subtitle file
–write-auto-sub write automatic subtitle file (youtube only)
–all-subs downloads all the available subtitles of the video
–list-subs lists all available subtitles for the video
–sub-format FORMAT subtitle format (default=srt) ([sbv/vtt] youtube only)
–sub-lang LANGS languages of the subtitles to download (optional) separated by commas, use IETF language tags like ‘en,pt’
Authentication Options:
-u, –username USERNAME account username
-p, –password PASSWORD account password
-2, –twofactor TWOFACTOR two-factor auth code
-n, –netrc use .netrc authentication data
–video-password PASSWORD video password (vimeo, smotri)
Post-processing Options:
-x, –extract-audio convert video files to audio-only files (requires ffmpeg or avconv and ffprobe or avprobe)
–audio-format FORMAT "best", "aac", "vorbis", "mp3", "m4a", "opus", or "wav"; best by default
–audio-quality QUALITY ffmpeg/avconv audio quality specification, 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)
-k, –keep-video keeps 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 videos)
–embed-thumbnail embed thumbnail in the audio as cover art
–add-metadata write metadata to the video file
–xattrs write metadata to the video file’s xattrs (using dublin core and xdg standards)
–prefer-avconv Prefer avconv over ffmpeg for running the postprocessors (default)
–prefer-ffmpeg Prefer ffmpeg over avconv for running the postprocessors
–exec CMD Execute a command on the file after downloading, similar to find’s -exec syntax. Example: –exec ‘adb push {} /sdcard/Music/ && rm {}’
[/bash]
ちなみにニコニコ動画に関しては下記でDLできます。
[bash]youtube-dl -u <ユーザー名> -p <パスワード> –extract-audio –audio-format mp3 –audio-quality 0 <動画のURL>[/bash]
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