Record the explicit provenance of public domain status.

[youtubedl] / README.txt

diff --git a/README.txt b/README.txt
index 4757a338b25780dcca13935d81efb5c1f5fb33b0..601fe9ae25a8edd9d06492e3610b101651225ef6 100644 (file)
--- a/README.txt
+++ b/README.txt
@@ -15,12 +15,20 @@ To install it right away for all UNIX users (Linux, OS X, etc.), type:
 
 If you do not have curl, you can alternatively use a recent wget:
 
 
 If you do not have curl, you can alternatively use a recent wget:
 

-    sudo wget https://yt-dl.org/downloads/2014.05.13/youtube-dl -O /usr/local/bin/youtube-dl
+    sudo wget https://yt-dl.org/downloads/latest/youtube-dl -O /usr/local/bin/youtube-dl

     sudo chmod a+x /usr/local/bin/youtube-dl
 
 Windows users can download a .exe file and place it in their home
 directory or any other location on their PATH.
 
     sudo chmod a+x /usr/local/bin/youtube-dl
 
 Windows users can download a .exe file and place it in their home
 directory or any other location on their PATH.
 

+OS X users can install youtube-dl with Homebrew.
+
+    brew install youtube-dl
+
+You can also use pip:
+
+    sudo pip install youtube-dl
+

 Alternatively, refer to the developer instructions below for how to
 check out and work with the git repository. For further options,
 including PGP signatures, see
 Alternatively, refer to the developer instructions below for how to
 check out and work with the git repository. For further options,
 including PGP signatures, see


@@ -31,7 +39,7 @@ DESCRIPTION
 
 youtube-dl is a small command-line program to download videos from
 YouTube.com and a few more sites. It requires the Python interpreter,
 
 youtube-dl is a small command-line program to download videos from
 YouTube.com and a few more sites. It requires the Python interpreter,

-version 2.6, 2.7, or 3.3+, and it is not platform specific. It should
+version 2.6, 2.7, or 3.2+, and it is not platform specific. It should

 work on your Unix box, on Windows or on Mac OS X. It is released to the
 public domain, which means you can modify it, redistribute it or use it
 however you like.
 work on your Unix box, on Windows or on Mac OS X. It is released to the
 public domain, which means you can modify it, redistribute it or use it
 however you like.


@@ -50,12 +58,6 @@ OPTIONS
                                      playlist or the command line) if an error
                                      occurs
     --dump-user-agent                display the current browser identification
                                      playlist or the command line) if an error
                                      occurs
     --dump-user-agent                display the current browser identification

-    --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

     --list-extractors                List all supported extractors and the URLs
                                      they would handle
     --extractor-descriptions         Output descriptions of all supported
     --list-extractors                List all supported extractors and the URLs
                                      they would handle
     --extractor-descriptions         Output descriptions of all supported


@@ -63,34 +65,24 @@ OPTIONS
     --proxy URL                      Use the specified HTTP/HTTPS proxy. Pass in
                                      an empty string (--proxy "") for direct
                                      connection
     --proxy URL                      Use the specified HTTP/HTTPS proxy. Pass in
                                      an empty string (--proxy "") for direct
                                      connection

-    --no-check-certificate           Suppress HTTPS certificate validation.
-    --prefer-insecure                Use an unencrypted connection to retrieve
-                                     information about the video. (Currently
-                                     supported only for YouTube)
-    --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

     --socket-timeout None            Time to wait before giving up, in seconds
     --socket-timeout None            Time to wait before giving up, in seconds

-    --bidi-workaround                Work around terminals that lack
-                                     bidirectional text support. Requires bidiv
-                                     or fribidi executable in PATH

     --default-search PREFIX          Use this prefix for unqualified URLs. For
                                      example "gvsearch2:" downloads two videos
                                      from google videos for  youtube-dl "large
     --default-search PREFIX          Use this prefix for unqualified URLs. For
                                      example "gvsearch2:" downloads two videos
                                      from google videos for  youtube-dl "large

-                                     apple". By default (with value "auto")
-                                     youtube-dl guesses.
+                                     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)
     --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)

-    --encoding ENCODING              Force the specified encoding (experimental)
+    --flat-playlist                  Do not extract the videos of a playlist,
+                                     only list them.

 
 Video Selection:
 ----------------
 
 Video Selection:
 ----------------


@@ -115,7 +107,8 @@ Video Selection:
                                      COUNT views
     --max-views COUNT                Do not download any videos with more than
                                      COUNT views
                                      COUNT views
     --max-views COUNT                Do not download any videos with more than
                                      COUNT views

-    --no-playlist                    download only the currently playing video
+    --no-playlist                    If the URL refers to a video and a
+                                     playlist, download only the video.

     --age-limit YEARS                download only videos suitable for the given
                                      age
     --download-archive FILE          Download only videos not listed in the
     --age-limit YEARS                download only videos suitable for the given
                                      age
     --download-archive FILE          Download only videos not listed in the


@@ -123,8 +116,6 @@ Video Selection:
                                      downloaded videos in it.
     --include-ads                    Download advertisements as well
                                      (experimental)
                                      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:
 -----------------
 
 Download Options:
 -----------------


@@ -142,9 +133,9 @@ Download Options:
 Filesystem Options:
 -------------------
 
 Filesystem Options:
 -------------------
 

-    -t, --title                      use title in file name (default)
+    -a, --batch-file FILE            file containing URLs to download ('-' for
+                                     stdin)

     --id                             use only video ID in file name
     --id                             use only video ID in file name

-    -l, --literal                    [deprecated] alias of --title

     -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
     -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


@@ -159,17 +150,19 @@ Filesystem Options:
                                      %(upload_date)s for the upload date
                                      (YYYYMMDD), %(extractor)s for the provider
                                      (youtube, metacafe, etc), %(id)s for the
                                      %(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 id, %(playlist_title)s,
+                                     %(playlist_id)s, or %(playlist)s (=title if
+                                     present, ID otherwise) for the playlist the

                                      video is in, %(playlist_index)s for 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
+                                     position in the playlist. %(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
                                      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/downloa
-                                     ds/%(uploader)s/%(title)s-%(id)s.%(ext)s' .
+                                     format. %% for a literal percent. 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
     --autonumber-size NUMBER         Specifies the number of digits in
                                      %(autonumber)s when it is present in output
                                      filename template or --auto-number option


@@ -177,19 +170,17 @@ Filesystem Options:
     --restrict-filenames             Restrict filenames to only ASCII
                                      characters, and avoid "&" and spaces in
                                      filenames
     --restrict-filenames             Restrict filenames to only ASCII
                                      characters, and avoid "&" and spaces in
                                      filenames

-    -a, --batch-file FILE            file containing URLs to download ('-' for
-                                     stdin)
-    --load-info FILE                 json file containing the video information
-                                     (created with the "--write-json" option)
+    -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)
     -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)

-    --cookies FILE                   file to read cookies from and dump cookie
-                                     jar in
-    --no-part                        do not use .part files
+    --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
     --no-mtime                       do not use the Last-modified header to set
                                      the file modification time
     --write-description              write video description to a .description


@@ -198,6 +189,19 @@ Filesystem Options:
     --write-annotations              write video annotations to a .annotation
                                      file
     --write-thumbnail                write thumbnail image to disk
     --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:
 -------------------------------
 
 Verbosity / Simulation Options:
 -------------------------------


@@ -218,6 +222,10 @@ Verbosity / Simulation Options:
     -j, --dump-json                  simulate, quiet but print JSON information.
                                      See --output for a description of available
                                      keys.
     -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.

     --newline                        output progress bar as new lines
     --no-progress                    do not print progress bar
     --console-title                  display progress in console titlebar
     --newline                        output progress bar as new lines
     --no-progress                    do not print progress bar
     --console-title                  display progress in console titlebar


@@ -229,21 +237,49 @@ Verbosity / Simulation Options:
                                      problems
     --print-traffic                  Display sent and read HTTP traffic
 
                                      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 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
+

 Video Format Options:
 ---------------------
 
     -f, --format FORMAT              video format code, specify the order of
 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.
+                                     preference using slashes: -f 22/17/18 .  -f
+                                     mp4 , -f m4a 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. Use commas to download multiple
+                                     audio formats, such as -f
+                                     136/137/mp4/bestvideo,140/m4a/bestaudio.
+                                     You can merge the video and audio of two
+                                     formats into a single file using -f <video-
+                                     format>+<audio-format> (requires ffmpeg or
+                                     avconv), for example -f
+                                     bestvideo+bestaudio.

     --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
     --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

+    --youtube-skip-dash-manifest     Do not download the DASH manifest on
+                                     YouTube videos

 
 Subtitle Options:
 -----------------
 
 Subtitle Options:
 -----------------


@@ -263,8 +299,9 @@ Subtitle Options:
 Authentication Options:
 -----------------------
 
 Authentication Options:
 -----------------------
 

-    -u, --username USERNAME          account username
+    -u, --username USERNAME          login with this account ID

     -p, --password PASSWORD          account password
     -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)
 
     -n, --netrc                      use .netrc authentication data
     --video-password PASSWORD        video password (vimeo, smotri)
 


@@ -275,14 +312,14 @@ Post-processing Options:
                                      (requires ffmpeg or avconv and ffprobe or
                                      avprobe)
     --audio-format FORMAT            "best", "aac", "vorbis", "mp3", "m4a",
                                      (requires ffmpeg or avconv and ffprobe or
                                      avprobe)
     --audio-format FORMAT            "best", "aac", "vorbis", "mp3", "m4a",

-                                     "opus", or "wav"; best by default
+                                     "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:
     --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)
+                                     mp4|flv|ogg|webm|mkv)

     -k, --keep-video                 keeps the video file on disk after the
                                      post-processing; the video is erased by
                                      default
     -k, --keep-video                 keeps the video file on disk after the
                                      post-processing; the video is erased by
                                      default


@@ -299,6 +336,10 @@ Post-processing Options:
                                      postprocessors (default)
     --prefer-ffmpeg                  Prefer ffmpeg over avconv for running the
                                      postprocessors
                                      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 {}'

 
 CONFIGURATION
 =============
 
 CONFIGURATION
 =============


@@ -346,10 +387,12 @@ In some cases, you don't want special characters such as 中, spaces, or
 or the filename through an 8bit-unsafe channel. In these cases, add the
 --restrict-filenames flag to get a shorter title:
 
 or the filename through an 8bit-unsafe channel. In these cases, add the
 --restrict-filenames flag to get a shorter title:
 

-    $ youtube-dl --get-filename -o "%(title)s.%(ext)s" BaW_jenozKc
-    youtube-dl test video ''_ä↭𝕐.mp4    # All kinds of weird characters
-    $ youtube-dl --get-filename -o "%(title)s.%(ext)s" BaW_jenozKc --restrict-filenames
-    youtube-dl_test_video_.mp4          # A simple file name
+``` {.bash}
+$ youtube-dl --get-filename -o "%(title)s.%(ext)s" BaW_jenozKc
+youtube-dl test video ''_ä↭𝕐.mp4    # All kinds of weird characters
+$ youtube-dl --get-filename -o "%(title)s.%(ext)s" BaW_jenozKc --restrict-filenames
+youtube-dl_test_video_.mp4          # A simple file name
+```

 
 VIDEO SELECTION
 ===============
 
 VIDEO SELECTION
 ===============


@@ -363,18 +406,74 @@ Videos can be filtered by their upload date using the options --date,
 
 Examples:
 
 
 Examples:
 

-    # Download only the videos uploaded in the last 6 months
-    $ youtube-dl --dateafter now-6months
+``` {.bash}
+# Download only the videos uploaded in the last 6 months
+$ youtube-dl --dateafter now-6months

 
 

-    # Download only the videos uploaded on January 1, 1970
-    $ youtube-dl --date 19700101
+# Download only the videos uploaded on January 1, 1970
+$ youtube-dl --date 19700101

 
 

-    $ # will only download the videos uploaded in the 200x decade
-    $ youtube-dl --dateafter 20000101 --datebefore 20091231
+$ # will only download the videos uploaded in the 200x decade
+$ youtube-dl --dateafter 20000101 --datebefore 20091231
+```

 
 FAQ
 ===
 
 
 FAQ
 ===
 

+How do I update youtube-dl?
+
+If you've followed our manual installation instructions, you can simply
+run youtube-dl -U (or, on Linux, sudo youtube-dl -U).
+
+If you have used pip, a simple sudo pip install -U youtube-dl is
+sufficient to update.
+
+If you have installed youtube-dl using a package manager like apt-get or
+yum, use the standard system update mechanism to update. Note that
+distribution packages are often outdated. As a rule of thumb, youtube-dl
+releases at least once a month, and often weekly or even daily. Simply
+go to http://yt-dl.org/ to find out the current version. Unfortunately,
+there is nothing we youtube-dl developers can do if your distributions
+serves a really outdated version. You can (and should) complain to your
+distribution in their bugtracker or support forum.
+
+As a last resort, you can also uninstall the version installed by your
+package manager and follow our manual installation instructions. For
+that, remove the distribution's package, with a line like
+
+    sudo apt-get remove -y youtube-dl
+
+Afterwards, simply follow our manual installation instructions:
+
+    sudo wget https://yt-dl.org/latest/youtube-dl -O /usr/local/bin/youtube-dl
+    sudo chmod a+x /usr/local/bin/youtube-dl
+    hash -r
+
+Again, from then on you'll be able to update with sudo youtube-dl -U.
+
+I'm getting an error Unable to extract OpenGraph title on YouTube playlists
+
+YouTube changed their playlist format in March 2014 and later on, so
+you'll need at least youtube-dl 2014.07.25 to download all YouTube
+videos.
+
+If you have installed youtube-dl with a package manager, pip, setup.py
+or a tarball, please use that to update. Note that Ubuntu packages do
+not seem to get updated anymore. Since we are not affiliated with
+Ubuntu, there is little we can do. Feel free to report bugs to the
+Ubuntu packaging guys - all they have to do is update the package to a
+somewhat recent version. See above for a way to update.
+
+Do I always have to pass in --max-quality FORMAT, or -citw?
+
+By default, youtube-dl intends to have the best options (incidentally,
+if you have a convincing case that these should be different, please
+file an issue where you explain that). Therefore, it is unnecessary and
+sometimes harmful to copy long option strings from webpages. In
+particular, --max-quality limits the video quality (so if you want the
+best quality, do NOT pass it in), and the only option out of -citw that
+is regularly useful is -i.
+

 Can you please put the -b option back?
 
 Most people asking this question are not aware that youtube-dl now
 Can you please put the -b option back?
 
 Most people asking this question are not aware that youtube-dl now


@@ -480,49 +579,54 @@ list (assuming your service is called yourextractor):
 4.  Start with this simple template and save it to
     youtube_dl/extractor/yourextractor.py:
 
 4.  Start with this simple template and save it to
     youtube_dl/extractor/yourextractor.py:
 

-        # coding: utf-8
-        from __future__ import unicode_literals
-
-        import re
-
-        from .common import InfoExtractor
-
-
-        class YourExtractorIE(InfoExtractor):
-            _VALID_URL = r'https?://(?:www\.)?yourextractor\.com/watch/(?P<id>[0-9]+)'
-            _TEST = {
-                'url': 'http://yourextractor.com/watch/42',
-                'md5': 'TODO: md5 sum of the first 10KiB of the video file',
-                'info_dict': {
-                    'id': '42',
-                    'ext': 'mp4',
-                    'title': 'Video title goes here',
-                    # TODO more properties, either as:
-                    # * A value
-                    # * MD5 checksum; start the string with md5:
-                    # * A regular expression; start the string with re:
-                    # * Any Python type (for example int or float)
-                }
+    ``` {.python}
+    # coding: utf-8
+    from __future__ import unicode_literals
+
+    from .common import InfoExtractor
+
+
+    class YourExtractorIE(InfoExtractor):
+        _VALID_URL = r'https?://(?:www\.)?yourextractor\.com/watch/(?P<id>[0-9]+)'
+        _TEST = {
+            'url': 'http://yourextractor.com/watch/42',
+            'md5': 'TODO: md5 sum of the first 10241 bytes of the video file (use --test)',
+            'info_dict': {
+                'id': '42',
+                'ext': 'mp4',
+                'title': 'Video title goes here',
+                'thumbnail': 're:^https?://.*\.jpg$',
+                # TODO more properties, either as:
+                # * A value
+                # * MD5 checksum; start the string with md5:
+                # * A regular expression; start the string with re:
+                # * Any Python type (for example int or float)

             }
             }

+        }

 
 

-            def _real_extract(self, url):
-                mobj = re.match(self._VALID_URL, url)
-                video_id = mobj.group('id')
+        def _real_extract(self, url):
+            video_id = self._match_id(url)
+            webpage = self._download_webpage(url, video_id)

 
 

-                # TODO more code goes here, for example ...
-                webpage = self._download_webpage(url, video_id)
-                title = self._html_search_regex(r'<h1>(.*?)</h1>', webpage, 'title')
+            # TODO more code goes here, for example ...
+            title = self._html_search_regex(r'<h1>(.*?)</h1>', webpage, 'title')

 
 

-                return {
-                    'id': video_id,
-                    'title': title,
-                    # TODO more properties (see youtube_dl/extractor/common.py)
-                }
+            return {
+                'id': video_id,
+                'title': title,
+                'description': self._og_search_description(webpage),
+                # TODO more properties (see youtube_dl/extractor/common.py)
+            }
+    ```

 
 5.  Add an import in youtube_dl/extractor/__init__.py.
 6.  Run python test/test_download.py TestDownload.test_YourExtractor.
     This should fail at first, but you can continually re-run it until
 
 5.  Add an import in youtube_dl/extractor/__init__.py.
 6.  Run python test/test_download.py TestDownload.test_YourExtractor.
     This should fail at first, but you can continually re-run it until

-    you're done.
+    you're done. If you decide to add more than one test, then rename
+    _TEST to _TESTS and make it into a list of dictionaries. The tests
+    will be then be named TestDownload.test_YourExtractor,
+    TestDownload.test_YourExtractor_1,
+    TestDownload.test_YourExtractor_2, etc.

 7.  Have a look at youtube_dl/common/extractor/common.py for possible
     helper methods and a detailed description of what your extractor
     should return. Add tests and code for as many as you want.
 7.  Have a look at youtube_dl/common/extractor/common.py for possible
     helper methods and a detailed description of what your extractor
     should return. Add tests and code for as many as you want.


@@ -540,6 +644,26 @@ list (assuming your service is called yourextractor):
 
 In any case, thank you very much for your contributions!
 
 
 In any case, thank you very much for your contributions!
 

+EMBEDDING YOUTUBE-DL
+====================
+
+youtube-dl makes the best effort to be a good command-line program, and
+thus should be callable from any programming language. If you encounter
+any problems parsing its output, feel free to create a report.
+
+From a Python program, you can embed youtube-dl in a more powerful
+fashion, like this:
+
+    import youtube_dl
+
+    ydl_opts = {}
+    with youtube_dl.YoutubeDL(ydl_opts) as ydl:
+        ydl.download(['http://www.youtube.com/watch?v=BaW_jenozKc'])
+
+Most likely, you'll want to use various options. For a list of what can
+be done, have a look at youtube_dl/YoutubeDL.py. For a start, if you
+want to intercept youtube-dl's output, set a logger object.
+

 BUGS
 ====
 
 BUGS
 ====
 


@@ -678,3 +802,4 @@ youtube-dl is released into the public domain by the copyright holders.
 This README file was originally written by Daniel Bolton
 (https://github.com/dbbolton) and is likewise released into the public
 domain.
 This README file was originally written by Daniel Bolton
 (https://github.com/dbbolton) and is likewise released into the public
 domain.

+