這一陣子因為有下載Youtube上公共電視台直播的需求，
爬文找解決方案。
剛好有在學Python，
所以就直接運用。
準備程序：
安裝Python，
安裝的過程請大家直接爬文，這部份網路上的教學太多了。
我是安裝miniconda。
以下是在miniconda的環境下來操作：
安裝 youtube-dl 和 ffmpeg
pip install youtube-dl
pip install ffmpeg
youtube-dl 模組支援的網站非常的多，請參考官方文件：
https://github.com/ytdl-org/youtube-dl/blob/master/docs/supportedsites.md
youtube-dl 的指令選項蠻多的，
鍵入youtube-dl –help後，可以查詢各項指令。
官方參考指令網址：
https://github.com/ytdl-org/youtube-dl/blob/master/README.md#options
下載 Youtube 影片：
youtube-dl https://www.youtube.com/watch?v=19g6IHsfsyY
執行結果如下：
(base) C:Userssuperuser>youtube-dl https://www.youtube.com/watch?v=19g6IHsfsyY
[youtube] 19g6IHsfsyY: Downloading webpage
[youtube] 19g6IHsfsyY: Downloading video info webpage
[download] Destination: 2017「未來與希望系列講座」5_27嚴長壽-19g6IHsfsyY.mp4
[download] 100% of 382.05MiB in 00:35
下載Youtube直播程序：
下載Youtube直播程序和上面的操作一樣，但麻煩的是下載不會自行終止。
所以最好做一個下載的批次執行檔，在windows 的工作排程中預約執行。
再做一個一個強制終止的批次執行檔，在直播結束時預約執行。
備註：存檔名抓系統年月日，在C碟的Mynideo目錄中自動存檔。
下載批次執行檔內容如下（存成auto_record.bat）：
@echo off
set x=%date:~0,4%%date:~5,2%%date:~8,2%
CD /d C:Myvideo
youtube-dl -o 公視台語台-%x%.%%(ext)s https://youtu.be/sHVv4H_mva0
強制終止的批次執行檔內容如下（存成stop_record.bat）：
@echo off
taskkill /FI “IMAGENAME eq cmd.exe”
————————————————————————————-
補充說明：
在jupyter notebook中執行的套件是 youtube_dl。
安裝指令：
pip install youtube_dl
安裝完成之後要重啟kernel
鍵入help (youtube_dl)，按執行可以查詢指令
Help on package youtube_dl:
NAME
youtube_dl - # coding: utf-8
PACKAGE CONTENTS
YoutubeDL
__main__
aes
cache
compat
downloader (package)
extractor (package)
jsinterp
options
postprocessor (package)
socks
swfinterp
update
utils
version
CLASSES
builtins.object
youtube_dl.YoutubeDL.YoutubeDL
class YoutubeDL(builtins.object)
| YoutubeDL(params=None, auto_init=True)
|
| YoutubeDL class.
|
| YoutubeDL objects are the ones responsible of downloading the
| actual video file and writing it to disk if the user has requested
| it, among some other tasks. In most cases there should be one per
| program. As, given a video URL, the downloader doesn't know how to
| extract all the needed information, task that InfoExtractors do, it
| has to pass the URL to one of them.
|
| For this, YoutubeDL objects have a method that allows
| InfoExtractors to be registered in a given order. When it is passed
| a URL, the YoutubeDL object handles it to the first InfoExtractor it
| finds that reports being able to handle it. The InfoExtractor extracts
| all the information about the video or videos the URL refers to, and
| YoutubeDL process the extracted information, possibly using a File
| Downloader to download the video.
|
| YoutubeDL objects accept a lot of parameters. In order not to saturate
| the object constructor with arguments, it receives a dictionary of
| options instead. These options are available through the params
| attribute for the InfoExtractors to use. The YoutubeDL also
| registers itself as the downloader in charge for the InfoExtractors
| that are added to it, so this is a "mutual registration".
|
| Available options:
|
| username: Username for authentication purposes.
| password: Password for authentication purposes.
| videopassword: Password for accessing a video.
| ap_mso: Adobe Pass multiple-system operator identifier.
| ap_username: Multiple-system operator account username.
| ap_password: Multiple-system operator account password.
| usenetrc: Use netrc for authentication instead.
| verbose: Print additional info to stdout.
| quiet: Do not print messages to stdout.
| no_warnings: Do not print out anything for warnings.
| forceurl: Force printing final URL.
| forcetitle: Force printing title.
| forceid: Force printing ID.
| forcethumbnail: Force printing thumbnail URL.
| forcedescription: Force printing description.
| forcefilename: Force printing final filename.
| forceduration: Force printing duration.
| forcejson: Force printing info_dict as JSON.
| dump_single_json: Force printing the info_dict of the whole playlist
| (or video) as a single JSON line.
| simulate: Do not download the video files.
| format: Video format code. See options.py for more information.
| outtmpl: Template for output names.
| restrictfilenames: Do not allow "&" and spaces in file names
| ignoreerrors: Do not stop on download errors.
| force_generic_extractor: Force downloader to use the generic extractor
| nooverwrites: Prevent overwriting files.
| playliststart: Playlist item to start at.
| playlistend: Playlist item to end at.
| playlist_items: Specific indices of playlist to download.
| playlistreverse: Download playlist items in reverse order.
| playlistrandom: Download playlist items in random order.
| matchtitle: Download only matching titles.
| rejecttitle: Reject downloads for matching titles.
| logger: Log messages to a logging.Logger instance.
| logtostderr: Log messages to stderr instead of stdout.
| writedescription: Write the video description to a .description file
| writeinfojson: Write the video description to a .info.json file
| writeannotations: Write the video annotations to a .annotations.xml file
| writethumbnail: Write the thumbnail image to a file
| write_all_thumbnails: Write all thumbnail formats to files
| writesubtitles: Write the video subtitles to a file
| writeautomaticsub: Write the automatically generated subtitles to a file
| allsubtitles: Downloads all the subtitles of the video
| (requires writesubtitles or writeautomaticsub)
| listsubtitles: Lists all available subtitles for the video
| subtitlesformat: The format code for subtitles
| subtitleslangs: List of languages of the subtitles to download
| keepvideo: Keep the video file after post-processing
| daterange: A DateRange object, download only if the upload_date is in the range.
| skip_download: Skip the actual download of the video file
| cachedir: Location of the cache files in the filesystem.
| False to disable filesystem cache.
| noplaylist: Download single video instead of a playlist if in doubt.
| age_limit: An integer representing the user's age in years.
| Unsuitable videos for the given age are skipped.
| min_views: An integer representing the minimum view count the video
| must have in order to not be skipped.
| Videos without view count information are always
| downloaded. None for no limit.
| max_views: An integer representing the maximum view count.
| Videos that are more popular than that are not
| downloaded.
| Videos without view count information are always
| downloaded. None for no limit.
| download_archive: File name of a file where all downloads are recorded.
| Videos already present in the file are not downloaded
| again.
| cookiefile: File name where cookies should be read from and dumped to.
| nocheckcertificate:Do not verify SSL certificates
| prefer_insecure: Use HTTP instead of HTTPS to retrieve information.
| At the moment, this is only supported by YouTube.
| proxy: URL of the proxy server to use
| geo_verification_proxy: URL of the proxy to use for IP address verification
| on geo-restricted sites.
| socket_timeout: Time to wait for unresponsive hosts, in seconds
| bidi_workaround: Work around buggy terminals without bidirectional text
| support, using fridibi
| debug_printtraffic:Print out sent and received HTTP traffic
| include_ads: Download ads as well
| default_search: Prepend this string if an input url is not valid.
| 'auto' for elaborate guessing
| encoding: Use this encoding instead of the system-specified.
| extract_flat: Do not resolve URLs, return the immediate result.
| Pass in 'in_playlist' to only show this behavior for
| playlist items.
| postprocessors: A list of dictionaries, each with an entry
| * key: The name of the postprocessor. See
| youtube_dl/postprocessor/__init__.py for a list.
| as well as any further keyword arguments for the
| postprocessor.
| progress_hooks: A list of functions that get called on download
| progress, with a dictionary with the entries
| * status: One of "downloading", "error", or "finished".
| Check this first and ignore unknown values.
|
| If status is one of "downloading", or "finished", the
| following properties may also be present:
| * filename: The final filename (always present)
| * tmpfilename: The filename we're currently writing to
| * downloaded_bytes: Bytes on disk
| * total_bytes: Size of the whole file, None if unknown
| * total_bytes_estimate: Guess of the eventual file size,
| None if unavailable.
| * elapsed: The number of seconds since download started.
| * eta: The estimated time in seconds, None if unknown
| * speed: The download speed in bytes/second, None if
| unknown
| * fragment_index: The counter of the currently
| downloaded video fragment.
| * fragment_count: The number of fragments (= individual
| files that will be merged)
|
| Progress hooks are guaranteed to be called at least once
| (with status "finished") if the download is successful.
| merge_output_format: Extension to use when merging formats.
| fixup: Automatically correct known faults of the file.
| One of:
| - "never": do nothing
| - "warn": only emit a warning
| - "detect_or_warn": check whether we can do anything
| about it, warn otherwise (default)
| source_address: Client-side IP address to bind to.
| call_home: Boolean, true iff we are allowed to contact the
| youtube-dl servers for debugging.
| sleep_interval: 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:Upper bound of a range for randomized sleep before each
| download (maximum possible number of seconds to sleep).
| Must only be used along with sleep_interval.
| Actual sleep time will be a random float from range
| [sleep_interval; max_sleep_interval].
| listformats: Print an overview of available video formats and exit.
| list_thumbnails: Print a table of all thumbnails and exit.
| match_filter: A function that gets called with the info_dict of
| every video.
| If it returns a message, the video is ignored.
| If it returns None, the video is downloaded.
| match_filter_func in utils.py is one example for this.
| no_color: Do not emit color codes in output.
| geo_bypass: Bypass geographic restriction via faking X-Forwarded-For
| HTTP header
| geo_bypass_country:
| Two-letter ISO 3166-2 country code that will be used for
| explicit geographic restriction bypassing via faking
| X-Forwarded-For HTTP header
| geo_bypass_ip_block:
| IP range in CIDR notation that will be used similarly to
| geo_bypass_country
|
| The following options determine which downloader is picked:
| external_downloader: Executable of the external downloader to call.
| None or unset for standard (built-in) downloader.
| hls_prefer_native: Use the native HLS downloader instead of ffmpeg/avconv
| if True, otherwise use ffmpeg/avconv if False, otherwise
| use downloader suggested by extractor if None.
|
| The following parameters are not used by YoutubeDL itself, they are used by
| the downloader (see youtube_dl/downloader/common.py):
| nopart, updatetime, buffersize, ratelimit, min_filesize, max_filesize, test,
| noresizebuffer, retries, continuedl, noprogress, consoletitle,
| xattr_set_filesize, external_downloader_args, hls_use_mpegts,
| http_chunk_size.
|
| The following options are used by the post processors:
| prefer_ffmpeg: If False, use avconv instead of ffmpeg if both are available,
| otherwise prefer ffmpeg.
| ffmpeg_location: Location of the ffmpeg/avconv binary; either the path
| to the binary or its containing directory.
| postprocessor_args: A list of additional command-line arguments for the
| postprocessor.
|
| The following options are used by the Youtube extractor:
| youtube_include_dash_manifest: If True (default), DASH manifests and related
| data will be downloaded and processed by extractor.
| You can reduce network I/O by disabling it if you don't
| care about DASH.
|
| Methods defined here:
|
| __enter__(self)
|
| __exit__(self, *args)
|
| __init__(self, params=None, auto_init=True)
| Create a FileDownloader object with the given options.
|
| add_default_extra_info(self, ie_result, ie, url)
|
| add_default_info_extractors(self)
| Add the InfoExtractors returned by gen_extractors to the end of the list
|
| add_info_extractor(self, ie)
| Add an InfoExtractor object to the end of the list.
|
| add_post_processor(self, pp)
| Add a PostProcessor object to the end of the chain.
|
| add_progress_hook(self, ph)
| Add the progress hook (currently only for the file downloader)
|
| build_format_selector(self, format_spec)
|
| download(self, url_list)
| Download a given list of URLs.
|
| download_with_info_file(self, info_filename)
|
| encode(self, s)
|
| extract_info(self, url, download=True, ie_key=None, extra_info={}, process=True, force_generic_extractor=False)
| Returns a list with a dictionary for each video we find.
| If 'download', also downloads the videos.
| extra_info is a dict containing the extra values to add to each result
|
| get_encoding(self)
|
| get_info_extractor(self, ie_key)
| Get an instance of an IE with name ie_key, it will try to get one from
| the _ies list, if there's no instance it will create a new one and add
| it to the extractor list.
|
| in_download_archive(self, info_dict)
|
| list_formats(self, info_dict)
|
| list_subtitles(self, video_id, subtitles, name='subtitles')
|
| list_thumbnails(self, info_dict)
|
| post_process(self, filename, ie_info)
| Run all the postprocessors on the given file.
|
| prepare_filename(self, info_dict)
| Generate the output filename.
|
| print_debug_header(self)
|
| process_ie_result(self, ie_result, download=True, extra_info={})
| Take the result of the ie(may be modified) and resolve all unresolved
| references (URLs, playlist items).
|
| It will also download the videos if 'download'.
| Returns the resolved ie_result.
|
| process_info(self, info_dict)
| Process a single resolved IE result.
|
| process_subtitles(self, video_id, normal_subtitles, automatic_captions)
| Select the requested subtitles and their format
|
| process_video_result(self, info_dict, download=True)
|
| record_download_archive(self, info_dict)
|
| report_error(self, message, tb=None)
| Do the same as trouble, but prefixes the message with 'ERROR:', colored
| in red if stderr is a tty file.
|
| report_file_already_downloaded(self, file_name)
| Report file has already been fully downloaded.
|
| report_warning(self, message)
| Print the message to stderr, it will be prefixed with 'WARNING:'
| If stderr is a tty file the 'WARNING:' will be colored
|
| restore_console_title(self)
|
| save_console_title(self)
|
| to_console_title(self, message)
|
| to_screen(self, message, skip_eol=False)
| Print message to stdout if not in quiet mode.
|
| to_stderr(self, message)
| Print message to stderr.
|
| to_stdout(self, message, skip_eol=False, check_quiet=False)
| Print message to stdout if not in quiet mode.
|
| trouble(self, message=None, tb=None)
| Determine action to take when a download problem appears.
|
| Depending on if the downloader has been configured to ignore
| download errors or not, this method may throw an exception or
| not when errors are found, after printing the message.
|
| tb, if given, is additional traceback information.
|
| urlopen(self, req)
| Start an HTTP download
|
| warn_if_short_id(self, argv)
|
| ----------------------------------------------------------------------
| Static methods defined here:
|
| add_extra_info(info_dict, extra_info)
| Set the keys from extra_info in info dict if they are missing
|
| filter_requested_info(info_dict)
|
| format_resolution(format, default='unknown')
|
| ----------------------------------------------------------------------
| Data descriptors defined here:
|
| __dict__
| dictionary for instance variables (if defined)
|
| __weakref__
| list of weak references to the object (if defined)
|
| ----------------------------------------------------------------------
| Data and other attributes defined here:
|
| params = None
FUNCTIONS
gen_extractors()
Return a list of an instance of every supported extractor.
The order does matter; the first extractor matched is the one handling the URL.
list_extractors(age_limit)
Return a list of extractors that are suitable for the given age,
sorted by extractor ID.
main(argv=None)
DATA
__all__ = ['main', 'YoutubeDL', 'gen_extractors', 'list_extractors']
__license__ = 'Public Domain'
FILE
c:userssuperuserminiconda3libsite-packagesyoutube_dl__init__.py