下載youtube影片的方法－史坦利Stanley程式Maker的部落格

下載影片的方法巿很多種,,而個人比較推薦的是利用Python 語言所開發的youtube-dl, 這是一個在命令列操作的軟體，使用方法很簡單，只要輸入youtube-dl URL 即可下載檔案，而需要圖形介面的使用者可下載Youtube-dlG,它是利用wxPython開發可跨平臺的 youtube-dlG (youtube-dl-gui) 當做 youtube-dl 的前端圖形操作界面

如讀者的系統為Windows 則直接下載執行檔即可使用，而Liunx 使用者要準備好Python，WxPython軟體安裝，要按照安裝程序準備安執行環境。

youtube-dl有很多參數可以使用，底下列出HELP的參數：

Usage: youtube-dl-script.py [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 experimental 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

options is not present) is used for the actual downloading.

--geo-bypass Bypass geographic restriction via faking X-Forwarded-For HTTP header (experimental)

--no-geo-bypass Do not bypass geographic restriction via

faking X-Forwarded-For HTTP header (experimental)

--geo-bypass-country CODE Force bypass geographic restriction with

explicitly provided two-letter ISO 3166-2 country code (experimental)

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

help for -o 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.

--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 (experimental)

--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,curl,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)

--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 --output 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, the parsed

parameters replace existing values.

Additional templates: %(album)s,

%(artist)s. Example: --metadata-from-title

"%(artist)s - %(title)s" matches a title

like "Coldplay - Paradise"

--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 (default)

--prefer-ffmpeg Prefer ffmpeg over avconv for running the postprocessors

--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)

#-------------------------------------------------

註:據說 Youtube 連結網址如果有「&」的話會導致下載失敗，可以前後用雙引號包起來就可以解決這個問題

官方網址及下載點(youtube-dl持續更新版本,請下載最新版本,目前為2017.05.01)

youtube-dl ( http://rg3.github.io/youtube-dl/ )
Youtube-dlG ( http://mrs0m30n3.github.io/youtube-dl-gui/

安裝步驟

在windows 下，如下載youtube-dl-2017.05.01.exe,則直接執行即可，
如為youtube-dl-2017.05.01.zip, 則要解開ZIP檔案後，找到setup.py, 然後執行
python setup.py install
最後執行完畢後會在 E:\XX\APP\Scripts 下新增 youtube-dl.exe