Initiate a new release.

[youtubedl] / youtube_dl / YoutubeDL.py

diff --git a/youtube_dl/YoutubeDL.py b/youtube_dl/YoutubeDL.py
old mode 100644 (file)
new mode 100755 (executable)
index 42cbcf6..9605f8f
--- a/youtube_dl/YoutubeDL.py
+++ b/youtube_dl/YoutubeDL.py
@@ -4,9 +4,13 @@
 from __future__ import absolute_import, unicode_literals
 
 import collections
 from __future__ import absolute_import, unicode_literals
 
 import collections

+import datetime

 import errno
 import io
 import errno
 import io

+import itertools

 import json
 import json

+import locale
+import operator

 import os
 import platform
 import re
 import os
 import platform
 import re


@@ -20,15 +24,22 @@ import traceback
 if os.name == 'nt':
     import ctypes
 
 if os.name == 'nt':
     import ctypes
 

-from .utils import (
+from .compat import (
+    compat_basestring,

     compat_cookiejar,
     compat_cookiejar,

+    compat_expanduser,

     compat_http_client,
     compat_http_client,

+    compat_kwargs,

     compat_str,
     compat_urllib_error,
     compat_urllib_request,
     compat_str,
     compat_urllib_error,
     compat_urllib_request,

+)
+from .utils import (
+    escape_url,

     ContentTooShortError,
     date_from_str,
     DateRange,
     ContentTooShortError,
     date_from_str,
     DateRange,

+    DEFAULT_OUTTMPL,

     determine_ext,
     DownloadError,
     encodeFilename,
     determine_ext,
     DownloadError,
     encodeFilename,


@@ -40,23 +51,37 @@ from .utils import (
     make_HTTPS_handler,
     MaxDownloadsReached,
     PagedList,
     make_HTTPS_handler,
     MaxDownloadsReached,
     PagedList,

+    parse_filesize,

     PostProcessingError,
     platform_name,
     preferredencoding,
     PostProcessingError,
     platform_name,
     preferredencoding,

+    render_table,

     SameFileError,
     sanitize_filename,
     SameFileError,
     sanitize_filename,

+    std_headers,

     subtitles_filename,
     takewhile_inclusive,
     UnavailableVideoError,
     url_basename,
     subtitles_filename,
     takewhile_inclusive,
     UnavailableVideoError,
     url_basename,

+    version_tuple,

     write_json_file,
     write_string,
     YoutubeDLHandler,
     prepend_extension,
     write_json_file,
     write_string,
     YoutubeDLHandler,
     prepend_extension,

+    args_to_str,
+    age_restricted,

 )
 )

+from .cache import Cache

 from .extractor import get_info_extractor, gen_extractors
 from .downloader import get_suitable_downloader
 from .extractor import get_info_extractor, gen_extractors
 from .downloader import get_suitable_downloader

-from .postprocessor import FFmpegMergerPP
+from .downloader.rtmp import rtmpdump_version
+from .postprocessor import (
+    FFmpegFixupM4aPP,
+    FFmpegFixupStretchedPP,
+    FFmpegMergerPP,
+    FFmpegPostProcessor,
+    get_postprocessor,
+)

 from .version import __version__
 
 
 from .version import __version__
 
 


@@ -93,6 +118,7 @@ class YoutubeDL(object):
     usenetrc:          Use netrc for authentication instead.
     verbose:           Print additional info to stdout.
     quiet:             Do not print messages to stdout.
     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.
     forceurl:          Force printing final URL.
     forcetitle:        Force printing title.
     forceid:           Force printing ID.


@@ -101,8 +127,10 @@ class YoutubeDL(object):
     forcefilename:     Force printing final filename.
     forceduration:     Force printing duration.
     forcejson:         Force printing info_dict as JSON.
     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.
     simulate:          Do not download the video files.

-    format:            Video format code.
+    format:            Video format code. See options.py for more information.

     format_limit:      Highest quality format to try.
     outtmpl:           Template for output names.
     restrictfilenames: Do not allow "&" and spaces in file names
     format_limit:      Highest quality format to try.
     outtmpl:           Template for output names.
     restrictfilenames: Do not allow "&" and spaces in file names


@@ -110,6 +138,8 @@ class YoutubeDL(object):
     nooverwrites:      Prevent overwriting files.
     playliststart:     Playlist item to start at.
     playlistend:       Playlist item to end at.
     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.

     matchtitle:        Download only matching titles.
     rejecttitle:       Reject downloads for matching titles.
     logger:            Log messages to a logging.Logger instance.
     matchtitle:        Download only matching titles.
     rejecttitle:       Reject downloads for matching titles.
     logger:            Log messages to a logging.Logger instance.


@@ -118,6 +148,7 @@ class YoutubeDL(object):
     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
     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 automatic subtitles to a file
     allsubtitles:      Downloads all the subtitles of the video
     writesubtitles:    Write the video subtitles to a file
     writeautomaticsub: Write the automatic subtitles to a file
     allsubtitles:      Downloads all the subtitles of the video


@@ -129,7 +160,7 @@ class YoutubeDL(object):
     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.
     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.

-                       None to disable filesystem cache.
+                       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.
     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.


@@ -147,6 +178,8 @@ class YoutubeDL(object):
                        again.
     cookiefile:        File name where cookies should be read from and dumped to.
     nocheckcertificate:Do not verify SSL certificates
                        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
     socket_timeout:    Time to wait for unresponsive hosts, in seconds
     bidi_workaround:   Work around buggy terminals without bidirectional text
     proxy:             URL of the proxy server to use
     socket_timeout:    Time to wait for unresponsive hosts, in seconds
     bidi_workaround:   Work around buggy terminals without bidirectional text


@@ -155,15 +188,58 @@ class YoutubeDL(object):
     include_ads:       Download ads as well
     default_search:    Prepend this string if an input url is not valid.
                        'auto' for elaborate guessing
     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" and "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)
+                       * downloaded_bytes: Bytes on disk
+                       * total_bytes: Size of the whole file, None if unknown
+                       * tmpfilename: The filename we're currently writing to
+                       * eta: The estimated time in seconds, None if unknown
+                       * speed: The download speed in bytes/second, None if
+                                unknown
+
+                       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:    (Experimental) 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.
+    external_downloader:  Executable of the external downloader to call.
+    listformats:       Print an overview of available video formats and exit.
+    list_thumbnails:   Print a table of all thumbnails and exit.
+

 
     The following parameters are not used by YoutubeDL itself, they are used by
     the FileDownloader:
     nopart, updatetime, buffersize, ratelimit, min_filesize, max_filesize, test,
 
     The following parameters are not used by YoutubeDL itself, they are used by
     the FileDownloader:
     nopart, updatetime, buffersize, ratelimit, min_filesize, max_filesize, test,

-    noresizebuffer, retries, continuedl, noprogress, consoletitle
+    noresizebuffer, retries, continuedl, noprogress, consoletitle,
+    xattr_set_filesize.

 
     The following options are used by the post processors:
     prefer_ffmpeg:     If True, use ffmpeg instead of avconv if both are available,
                        otherwise prefer avconv.
 
     The following options are used by the post processors:
     prefer_ffmpeg:     If True, use ffmpeg instead of avconv if both are available,
                        otherwise prefer avconv.

+    exec_cmd:          Arbitrary command to run after downloading

     """
 
     params = None
     """
 
     params = None


@@ -173,7 +249,7 @@ class YoutubeDL(object):
     _num_downloads = None
     _screen_file = None
 
     _num_downloads = None
     _screen_file = None
 

-    def __init__(self, params=None):
+    def __init__(self, params=None, auto_init=True):

         """Create a FileDownloader object with the given options."""
         if params is None:
             params = {}
         """Create a FileDownloader object with the given options."""
         if params is None:
             params = {}


@@ -186,6 +262,7 @@ class YoutubeDL(object):
         self._screen_file = [sys.stdout, sys.stderr][params.get('logtostderr', False)]
         self._err_file = sys.stderr
         self.params = params
         self._screen_file = [sys.stdout, sys.stderr][params.get('logtostderr', False)]
         self._err_file = sys.stderr
         self.params = params

+        self.cache = Cache(self)

 
         if params.get('bidi_workaround', False):
             try:
 
         if params.get('bidi_workaround', False):
             try:


@@ -216,11 +293,11 @@ class YoutubeDL(object):
 
         if (sys.version_info >= (3,) and sys.platform != 'win32' and
                 sys.getfilesystemencoding() in ['ascii', 'ANSI_X3.4-1968']
 
         if (sys.version_info >= (3,) and sys.platform != 'win32' and
                 sys.getfilesystemencoding() in ['ascii', 'ANSI_X3.4-1968']

-                and not params['restrictfilenames']):
+                and not params.get('restrictfilenames', False)):

             # On Python 3, the Unicode filesystem API will throw errors (#1474)
             self.report_warning(
                 'Assuming --restrict-filenames since file system encoding '
             # On Python 3, the Unicode filesystem API will throw errors (#1474)
             self.report_warning(
                 'Assuming --restrict-filenames since file system encoding '

-                'cannot encode all charactes. '
+                'cannot encode all characters. '

                 'Set the LC_ALL environment variable to fix this.')
             self.params['restrictfilenames'] = True
 
                 'Set the LC_ALL environment variable to fix this.')
             self.params['restrictfilenames'] = True
 


@@ -229,6 +306,36 @@ class YoutubeDL(object):
 
         self._setup_opener()
 
 
         self._setup_opener()
 

+        if auto_init:
+            self.print_debug_header()
+            self.add_default_info_extractors()
+
+        for pp_def_raw in self.params.get('postprocessors', []):
+            pp_class = get_postprocessor(pp_def_raw['key'])
+            pp_def = dict(pp_def_raw)
+            del pp_def['key']
+            pp = pp_class(self, **compat_kwargs(pp_def))
+            self.add_post_processor(pp)
+
+        for ph in self.params.get('progress_hooks', []):
+            self.add_progress_hook(ph)
+
+    def warn_if_short_id(self, argv):
+        # short YouTube ID starting with dash?
+        idxs = [
+            i for i, a in enumerate(argv)
+            if re.match(r'^-[0-9A-Za-z_-]{10}$', a)]
+        if idxs:
+            correct_argv = (
+                ['youtube-dl'] +
+                [a for i, a in enumerate(argv) if i not in idxs] +
+                ['--'] + [argv[i] for i in idxs]
+            )
+            self.report_warning(
+                'Long argument string detected. '
+                'Use -- to separate parameters and URLs, like this:\n%s\n' %
+                args_to_str(correct_argv))
+

     def add_info_extractor(self, ie):
         """Add an InfoExtractor object to the end of the list."""
         self._ies.append(ie)
     def add_info_extractor(self, ie):
         """Add an InfoExtractor object to the end of the list."""
         self._ies.append(ie)


@@ -268,18 +375,21 @@ class YoutubeDL(object):
             return message
 
         assert hasattr(self, '_output_process')
             return message
 
         assert hasattr(self, '_output_process')

-        assert type(message) == type('')
+        assert isinstance(message, compat_str)

         line_count = message.count('\n') + 1
         self._output_process.stdin.write((message + '\n').encode('utf-8'))
         self._output_process.stdin.flush()
         res = ''.join(self._output_channel.readline().decode('utf-8')
         line_count = message.count('\n') + 1
         self._output_process.stdin.write((message + '\n').encode('utf-8'))
         self._output_process.stdin.flush()
         res = ''.join(self._output_channel.readline().decode('utf-8')

-                       for _ in range(line_count))
+                      for _ in range(line_count))

         return res[:-len('\n')]
 
     def to_screen(self, message, skip_eol=False):
         """Print message to stdout if not in quiet mode."""
         return self.to_stdout(message, skip_eol, check_quiet=True)
 
         return res[:-len('\n')]
 
     def to_screen(self, message, skip_eol=False):
         """Print message to stdout if not in quiet mode."""
         return self.to_stdout(message, skip_eol, check_quiet=True)
 

+    def _write_string(self, s, out=None):
+        write_string(s, out=out, encoding=self.params.get('encoding'))
+

     def to_stdout(self, message, skip_eol=False, check_quiet=False):
         """Print message to stdout if not in quiet mode."""
         if self.params.get('logger'):
     def to_stdout(self, message, skip_eol=False, check_quiet=False):
         """Print message to stdout if not in quiet mode."""
         if self.params.get('logger'):


@@ -289,17 +399,17 @@ class YoutubeDL(object):
             terminator = ['\n', ''][skip_eol]
             output = message + terminator
 
             terminator = ['\n', ''][skip_eol]
             output = message + terminator
 

-            write_string(output, self._screen_file)
+            self._write_string(output, self._screen_file)

 
     def to_stderr(self, message):
         """Print message to stderr."""
 
     def to_stderr(self, message):
         """Print message to stderr."""

-        assert type(message) == type('')
+        assert isinstance(message, compat_str)

         if self.params.get('logger'):
             self.params['logger'].error(message)
         else:
             message = self._bidi_workaround(message)
             output = message + '\n'
         if self.params.get('logger'):
             self.params['logger'].error(message)
         else:
             message = self._bidi_workaround(message)
             output = message + '\n'

-            write_string(output, self._err_file)
+            self._write_string(output, self._err_file)

 
     def to_console_title(self, message):
         if not self.params.get('consoletitle', False):
 
     def to_console_title(self, message):
         if not self.params.get('consoletitle', False):


@@ -309,21 +419,21 @@ class YoutubeDL(object):
             # already of type unicode()
             ctypes.windll.kernel32.SetConsoleTitleW(ctypes.c_wchar_p(message))
         elif 'TERM' in os.environ:
             # already of type unicode()
             ctypes.windll.kernel32.SetConsoleTitleW(ctypes.c_wchar_p(message))
         elif 'TERM' in os.environ:

-            write_string('\033]0;%s\007' % message, self._screen_file)
+            self._write_string('\033]0;%s\007' % message, self._screen_file)

 
     def save_console_title(self):
         if not self.params.get('consoletitle', False):
             return
         if 'TERM' in os.environ:
             # Save the title on stack
 
     def save_console_title(self):
         if not self.params.get('consoletitle', False):
             return
         if 'TERM' in os.environ:
             # Save the title on stack

-            write_string('\033[22;0t', self._screen_file)
+            self._write_string('\033[22;0t', self._screen_file)

 
     def restore_console_title(self):
         if not self.params.get('consoletitle', False):
             return
         if 'TERM' in os.environ:
             # Restore the title from stack
 
     def restore_console_title(self):
         if not self.params.get('consoletitle', False):
             return
         if 'TERM' in os.environ:
             # Restore the title from stack

-            write_string('\033[23;0t', self._screen_file)
+            self._write_string('\033[23;0t', self._screen_file)

 
     def __enter__(self):
         self.save_console_title()
 
     def __enter__(self):
         self.save_console_title()


@@ -370,12 +480,17 @@ class YoutubeDL(object):
         Print the message to stderr, it will be prefixed with 'WARNING:'
         If stderr is a tty file the 'WARNING:' will be colored
         '''
         Print the message to stderr, it will be prefixed with 'WARNING:'
         If stderr is a tty file the 'WARNING:' will be colored
         '''

-        if self._err_file.isatty() and os.name != 'nt':
-            _msg_header = '\033[0;33mWARNING:\033[0m'
+        if self.params.get('logger') is not None:
+            self.params['logger'].warning(message)

         else:
         else:

-            _msg_header = 'WARNING:'
-        warning_message = '%s %s' % (_msg_header, message)
-        self.to_stderr(warning_message)
+            if self.params.get('no_warnings'):
+                return
+            if self._err_file.isatty() and os.name != 'nt':
+                _msg_header = '\033[0;33mWARNING:\033[0m'
+            else:
+                _msg_header = 'WARNING:'
+            warning_message = '%s %s' % (_msg_header, message)
+            self.to_stderr(warning_message)

 
     def report_error(self, message, tb=None):
         '''
 
     def report_error(self, message, tb=None):
         '''


@@ -408,7 +523,14 @@ class YoutubeDL(object):
             autonumber_templ = '%0' + str(autonumber_size) + 'd'
             template_dict['autonumber'] = autonumber_templ % self._num_downloads
             if template_dict.get('playlist_index') is not None:
             autonumber_templ = '%0' + str(autonumber_size) + 'd'
             template_dict['autonumber'] = autonumber_templ % self._num_downloads
             if template_dict.get('playlist_index') is not None:

-                template_dict['playlist_index'] = '%05d' % template_dict['playlist_index']
+                template_dict['playlist_index'] = '%0*d' % (len(str(template_dict['n_entries'])), template_dict['playlist_index'])
+            if template_dict.get('resolution') is None:
+                if template_dict.get('width') and template_dict.get('height'):
+                    template_dict['resolution'] = '%dx%d' % (template_dict['width'], template_dict['height'])
+                elif template_dict.get('height'):
+                    template_dict['resolution'] = '%sp' % template_dict['height']
+                elif template_dict.get('width'):
+                    template_dict['resolution'] = '?x%d' % template_dict['width']

 
             sanitize = lambda k, v: sanitize_filename(
                 compat_str(v),
 
             sanitize = lambda k, v: sanitize_filename(
                 compat_str(v),


@@ -419,8 +541,14 @@ class YoutubeDL(object):
                                  if v is not None)
             template_dict = collections.defaultdict(lambda: 'NA', template_dict)
 
                                  if v is not None)
             template_dict = collections.defaultdict(lambda: 'NA', template_dict)
 

-            tmpl = os.path.expanduser(self.params['outtmpl'])
+            outtmpl = self.params.get('outtmpl', DEFAULT_OUTTMPL)
+            tmpl = compat_expanduser(outtmpl)

             filename = tmpl % template_dict
             filename = tmpl % template_dict

+            # Temporary fix for #4787
+            # 'Treat' all problem characters by passing filename through preferredencoding
+            # to workaround encoding issues with subprocess on python2 @ Windows
+            if sys.version_info < (3, 0) and sys.platform == 'win32':
+                filename = encodeFilename(filename, True).decode(preferredencoding())

             return filename
         except ValueError as err:
             self.report_error('Error in output template: ' + str(err) + ' (encoding: ' + repr(preferredencoding()) + ')')
             return filename
         except ValueError as err:
             self.report_error('Error in output template: ' + str(err) + ' (encoding: ' + repr(preferredencoding()) + ')')


@@ -454,10 +582,8 @@ class YoutubeDL(object):
             max_views = self.params.get('max_views')
             if max_views is not None and view_count > max_views:
                 return 'Skipping %s, because it has exceeded the maximum view count (%d/%d)' % (video_title, view_count, max_views)
             max_views = self.params.get('max_views')
             if max_views is not None and view_count > max_views:
                 return 'Skipping %s, because it has exceeded the maximum view count (%d/%d)' % (video_title, view_count, max_views)

-        age_limit = self.params.get('age_limit')
-        if age_limit is not None:
-            if age_limit < info_dict.get('age_limit', 0):
-                return 'Skipping "' + title + '" because it is age restricted'
+        if age_restricted(info_dict.get('age_limit'), self.params.get('age_limit')):
+            return 'Skipping "%s" because it is age restricted' % title

         if self.in_download_archive(info_dict):
             return '%s has already been recorded in archive' % video_title
         return None
         if self.in_download_archive(info_dict):
             return '%s has already been recorded in archive' % video_title
         return None


@@ -491,7 +617,7 @@ class YoutubeDL(object):
 
             try:
                 ie_result = ie.extract(url)
 
             try:
                 ie_result = ie.extract(url)

-                if ie_result is None: # Finished already (backwards compatibility; listformats and friends should be moved here)
+                if ie_result is None:  # Finished already (backwards compatibility; listformats and friends should be moved here)

                     break
                 if isinstance(ie_result, list):
                     # Backwards compatibility: old IE result format
                     break
                 if isinstance(ie_result, list):
                     # Backwards compatibility: old IE result format


@@ -499,18 +625,12 @@ class YoutubeDL(object):
                         '_type': 'compat_list',
                         'entries': ie_result,
                     }
                         '_type': 'compat_list',
                         'entries': ie_result,
                     }

-                self.add_extra_info(ie_result,
-                    {
-                        'extractor': ie.IE_NAME,
-                        'webpage_url': url,
-                        'webpage_url_basename': url_basename(url),
-                        'extractor_key': ie.ie_key(),
-                    })
+                self.add_default_extra_info(ie_result, ie, url)

                 if process:
                     return self.process_ie_result(ie_result, download, extra_info)
                 else:
                     return ie_result
                 if process:
                     return self.process_ie_result(ie_result, download, extra_info)
                 else:
                     return ie_result

-            except ExtractorError as de: # An error we somewhat expected
+            except ExtractorError as de:  # An error we somewhat expected

                 self.report_error(compat_str(de), de.format_traceback())
                 break
             except MaxDownloadsReached:
                 self.report_error(compat_str(de), de.format_traceback())
                 break
             except MaxDownloadsReached:


@@ -522,7 +642,15 @@ class YoutubeDL(object):
                 else:
                     raise
         else:
                 else:
                     raise
         else:

-            self.report_error('no suitable InfoExtractor: %s' % url)
+            self.report_error('no suitable InfoExtractor for URL %s' % url)
+
+    def add_default_extra_info(self, ie_result, ie, url):
+        self.add_extra_info(ie_result, {
+            'extractor': ie.IE_NAME,
+            'webpage_url': url,
+            'webpage_url_basename': url_basename(url),
+            'extractor_key': ie.ie_key(),
+        })

 
     def process_ie_result(self, ie_result, download=True, extra_info={}):
         """
 
     def process_ie_result(self, ie_result, download=True, extra_info={}):
         """


@@ -533,7 +661,16 @@ class YoutubeDL(object):
         Returns the resolved ie_result.
         """
 
         Returns the resolved ie_result.
         """
 

-        result_type = ie_result.get('_type', 'video') # If not given we suppose it's a video, support the default old system
+        result_type = ie_result.get('_type', 'video')
+
+        if result_type in ('url', 'url_transparent'):
+            extract_flat = self.params.get('extract_flat', False)
+            if ((extract_flat == 'in_playlist' and 'playlist' in extra_info) or
+                    extract_flat is True):
+                if self.params.get('forcejson', False):
+                    self.to_stdout(json.dumps(ie_result))
+                return ie_result
+

         if result_type == 'video':
             self.add_extra_info(ie_result, extra_info)
             return self.process_video_result(ie_result, download=download)
         if result_type == 'video':
             self.add_extra_info(ie_result, extra_info)
             return self.process_video_result(ie_result, download=download)


@@ -550,27 +687,19 @@ class YoutubeDL(object):
                 ie_result['url'], ie_key=ie_result.get('ie_key'),
                 extra_info=extra_info, download=False, process=False)
 
                 ie_result['url'], ie_key=ie_result.get('ie_key'),
                 extra_info=extra_info, download=False, process=False)
 

-            def make_result(embedded_info):
-                new_result = ie_result.copy()
-                for f in ('_type', 'url', 'ext', 'player_url', 'formats',
-                          'entries', 'ie_key', 'duration',
-                          'subtitles', 'annotations', 'format',
-                          'thumbnail', 'thumbnails'):
-                    if f in new_result:
-                        del new_result[f]
-                    if f in embedded_info:
-                        new_result[f] = embedded_info[f]
-                return new_result
-            new_result = make_result(info)
+            force_properties = dict(
+                (k, v) for k, v in ie_result.items() if v is not None)
+            for f in ('_type', 'url'):
+                if f in force_properties:
+                    del force_properties[f]
+            new_result = info.copy()
+            new_result.update(force_properties)

 
             assert new_result.get('_type') != 'url_transparent'
 
             assert new_result.get('_type') != 'url_transparent'

-            if new_result.get('_type') == 'compat_list':
-                new_result['entries'] = [
-                    make_result(e) for e in new_result['entries']]

 
             return self.process_ie_result(
                 new_result, download=download, extra_info=extra_info)
 
             return self.process_ie_result(
                 new_result, download=download, extra_info=extra_info)

-        elif result_type == 'playlist':
+        elif result_type == 'playlist' or result_type == 'multi_video':

             # We process each entry in the playlist
             playlist = ie_result.get('title', None) or ie_result.get('id', None)
             self.to_screen('[download] Downloading playlist: %s' % playlist)
             # We process each entry in the playlist
             playlist = ie_result.get('title', None) or ie_result.get('id', None)
             self.to_screen('[download] Downloading playlist: %s' % playlist)


@@ -583,26 +712,66 @@ class YoutubeDL(object):
             if playlistend == -1:
                 playlistend = None
 
             if playlistend == -1:
                 playlistend = None
 

-            if isinstance(ie_result['entries'], list):
-                n_all_entries = len(ie_result['entries'])
-                entries = ie_result['entries'][playliststart:playlistend]
+            playlistitems_str = self.params.get('playlist_items', None)
+            playlistitems = None
+            if playlistitems_str is not None:
+                def iter_playlistitems(format):
+                    for string_segment in format.split(','):
+                        if '-' in string_segment:
+                            start, end = string_segment.split('-')
+                            for item in range(int(start), int(end) + 1):
+                                yield int(item)
+                        else:
+                            yield int(string_segment)
+                playlistitems = iter_playlistitems(playlistitems_str)
+
+            ie_entries = ie_result['entries']
+            if isinstance(ie_entries, list):
+                n_all_entries = len(ie_entries)
+                if playlistitems:
+                    entries = [ie_entries[i - 1] for i in playlistitems]
+                else:
+                    entries = ie_entries[playliststart:playlistend]

                 n_entries = len(entries)
                 self.to_screen(
                     "[%s] playlist %s: Collected %d video ids (downloading %d of them)" %
                     (ie_result['extractor'], playlist, n_all_entries, n_entries))
                 n_entries = len(entries)
                 self.to_screen(
                     "[%s] playlist %s: Collected %d video ids (downloading %d of them)" %
                     (ie_result['extractor'], playlist, n_all_entries, n_entries))

-            else:
-                assert isinstance(ie_result['entries'], PagedList)
-                entries = ie_result['entries'].getslice(
-                    playliststart, playlistend)
+            elif isinstance(ie_entries, PagedList):
+                if playlistitems:
+                    entries = []
+                    for item in playlistitems:
+                        entries.extend(ie_entries.getslice(
+                            item - 1, item
+                        ))
+                else:
+                    entries = ie_entries.getslice(
+                        playliststart, playlistend)
+                n_entries = len(entries)
+                self.to_screen(
+                    "[%s] playlist %s: Downloading %d videos" %
+                    (ie_result['extractor'], playlist, n_entries))
+            else:  # iterable
+                if playlistitems:
+                    entry_list = list(ie_entries)
+                    entries = [entry_list[i - 1] for i in playlistitems]
+                else:
+                    entries = list(itertools.islice(
+                        ie_entries, playliststart, playlistend))

                 n_entries = len(entries)
                 self.to_screen(
                     "[%s] playlist %s: Downloading %d videos" %
                     (ie_result['extractor'], playlist, n_entries))
 
                 n_entries = len(entries)
                 self.to_screen(
                     "[%s] playlist %s: Downloading %d videos" %
                     (ie_result['extractor'], playlist, n_entries))
 

+            if self.params.get('playlistreverse', False):
+                entries = entries[::-1]
+

             for i, entry in enumerate(entries, 1):
             for i, entry in enumerate(entries, 1):

-                self.to_screen('[download] Downloading video #%s of %s' % (i, n_entries))
+                self.to_screen('[download] Downloading video %s of %s' % (i, n_entries))

                 extra = {
                 extra = {

+                    'n_entries': n_entries,

                     'playlist': playlist,
                     'playlist': playlist,

+                    'playlist_id': ie_result.get('id'),
+                    'playlist_title': ie_result.get('title'),

                     'playlist_index': i + playliststart,
                     'extractor': ie_result['extractor'],
                     'webpage_url': ie_result['webpage_url'],
                     'playlist_index': i + playliststart,
                     'extractor': ie_result['extractor'],
                     'webpage_url': ie_result['webpage_url'],


@@ -622,14 +791,20 @@ class YoutubeDL(object):
             ie_result['entries'] = playlist_results
             return ie_result
         elif result_type == 'compat_list':
             ie_result['entries'] = playlist_results
             return ie_result
         elif result_type == 'compat_list':

+            self.report_warning(
+                'Extractor %s returned a compat_list result. '
+                'It needs to be updated.' % ie_result.get('extractor'))
+

             def _fixup(r):
             def _fixup(r):

-                self.add_extra_info(r,
+                self.add_extra_info(
+                    r,

                     {
                         'extractor': ie_result['extractor'],
                         'webpage_url': ie_result['webpage_url'],
                         'webpage_url_basename': url_basename(ie_result['webpage_url']),
                         'extractor_key': ie_result['extractor_key'],
                     {
                         'extractor': ie_result['extractor'],
                         'webpage_url': ie_result['webpage_url'],
                         'webpage_url_basename': url_basename(ie_result['webpage_url']),
                         'extractor_key': ie_result['extractor_key'],

-                    })
+                    }
+                )

                 return r
             ie_result['entries'] = [
                 self.process_ie_result(_fixup(r), download, extra_info)
                 return r
             ie_result['entries'] = [
                 self.process_ie_result(_fixup(r), download, extra_info)


@@ -639,7 +814,59 @@ class YoutubeDL(object):
         else:
             raise Exception('Invalid result type: %s' % result_type)
 
         else:
             raise Exception('Invalid result type: %s' % result_type)
 

+    def _apply_format_filter(self, format_spec, available_formats):
+        " Returns a tuple of the remaining format_spec and filtered formats "
+
+        OPERATORS = {
+            '<': operator.lt,
+            '<=': operator.le,
+            '>': operator.gt,
+            '>=': operator.ge,
+            '=': operator.eq,
+            '!=': operator.ne,
+        }
+        operator_rex = re.compile(r'''(?x)\s*\[
+            (?P<key>width|height|tbr|abr|vbr|filesize|fps)
+            \s*(?P<op>%s)(?P<none_inclusive>\s*\?)?\s*
+            (?P<value>[0-9.]+(?:[kKmMgGtTpPeEzZyY]i?[Bb]?)?)
+            \]$
+            ''' % '|'.join(map(re.escape, OPERATORS.keys())))
+        m = operator_rex.search(format_spec)
+        if not m:
+            raise ValueError('Invalid format specification %r' % format_spec)
+
+        try:
+            comparison_value = int(m.group('value'))
+        except ValueError:
+            comparison_value = parse_filesize(m.group('value'))
+            if comparison_value is None:
+                comparison_value = parse_filesize(m.group('value') + 'B')
+            if comparison_value is None:
+                raise ValueError(
+                    'Invalid value %r in format specification %r' % (
+                        m.group('value'), format_spec))
+        op = OPERATORS[m.group('op')]
+
+        def _filter(f):
+            actual_value = f.get(m.group('key'))
+            if actual_value is None:
+                return m.group('none_inclusive')
+            return op(actual_value, comparison_value)
+        new_formats = [f for f in available_formats if _filter(f)]
+
+        new_format_spec = format_spec[:-len(m.group(0))]
+        if not new_format_spec:
+            new_format_spec = 'best'
+
+        return (new_format_spec, new_formats)
+

     def select_format(self, format_spec, available_formats):
     def select_format(self, format_spec, available_formats):

+        while format_spec.endswith(']'):
+            format_spec, available_formats = self._apply_format_filter(
+                format_spec, available_formats)
+        if not available_formats:
+            return None
+

         if format_spec == 'best' or format_spec is None:
             return available_formats[-1]
         elif format_spec == 'worst':
         if format_spec == 'best' or format_spec is None:
             return available_formats[-1]
         elif format_spec == 'worst':


@@ -656,8 +883,20 @@ class YoutubeDL(object):
                 if f.get('vcodec') == 'none']
             if audio_formats:
                 return audio_formats[0]
                 if f.get('vcodec') == 'none']
             if audio_formats:
                 return audio_formats[0]

+        elif format_spec == 'bestvideo':
+            video_formats = [
+                f for f in available_formats
+                if f.get('acodec') == 'none']
+            if video_formats:
+                return video_formats[-1]
+        elif format_spec == 'worstvideo':
+            video_formats = [
+                f for f in available_formats
+                if f.get('acodec') == 'none']
+            if video_formats:
+                return video_formats[0]

         else:
         else:

-            extensions = ['mp4', 'flv', 'webm', '3gp']
+            extensions = ['mp4', 'flv', 'webm', '3gp', 'm4a', 'mp3', 'ogg', 'aac', 'wav']

             if format_spec in extensions:
                 filter_f = lambda f: f['ext'] == format_spec
             else:
             if format_spec in extensions:
                 filter_f = lambda f: f['ext'] == format_spec
             else:


@@ -667,14 +906,85 @@ class YoutubeDL(object):
                 return matches[-1]
         return None
 
                 return matches[-1]
         return None
 

+    def _calc_headers(self, info_dict):
+        res = std_headers.copy()
+
+        add_headers = info_dict.get('http_headers')
+        if add_headers:
+            res.update(add_headers)
+
+        cookies = self._calc_cookies(info_dict)
+        if cookies:
+            res['Cookie'] = cookies
+
+        return res
+
+    def _calc_cookies(self, info_dict):
+        class _PseudoRequest(object):
+            def __init__(self, url):
+                self.url = url
+                self.headers = {}
+                self.unverifiable = False
+
+            def add_unredirected_header(self, k, v):
+                self.headers[k] = v
+
+            def get_full_url(self):
+                return self.url
+
+            def is_unverifiable(self):
+                return self.unverifiable
+
+            def has_header(self, h):
+                return h in self.headers
+
+        pr = _PseudoRequest(info_dict['url'])
+        self.cookiejar.add_cookie_header(pr)
+        return pr.headers.get('Cookie')
+

     def process_video_result(self, info_dict, download=True):
         assert info_dict.get('_type', 'video') == 'video'
 
     def process_video_result(self, info_dict, download=True):
         assert info_dict.get('_type', 'video') == 'video'
 

+        if 'id' not in info_dict:
+            raise ExtractorError('Missing "id" field in extractor result')
+        if 'title' not in info_dict:
+            raise ExtractorError('Missing "title" field in extractor result')
+

         if 'playlist' not in info_dict:
             # It isn't part of a playlist
             info_dict['playlist'] = None
             info_dict['playlist_index'] = None
 
         if 'playlist' not in info_dict:
             # It isn't part of a playlist
             info_dict['playlist'] = None
             info_dict['playlist_index'] = None
 

+        thumbnails = info_dict.get('thumbnails')
+        if thumbnails is None:
+            thumbnail = info_dict.get('thumbnail')
+            if thumbnail:
+                info_dict['thumbnails'] = thumbnails = [{'url': thumbnail}]
+        if thumbnails:
+            thumbnails.sort(key=lambda t: (
+                t.get('preference'), t.get('width'), t.get('height'),
+                t.get('id'), t.get('url')))
+            for i, t in enumerate(thumbnails):
+                if 'width' in t and 'height' in t:
+                    t['resolution'] = '%dx%d' % (t['width'], t['height'])
+                if t.get('id') is None:
+                    t['id'] = '%d' % i
+
+        if thumbnails and 'thumbnail' not in info_dict:
+            info_dict['thumbnail'] = thumbnails[-1]['url']
+
+        if 'display_id' not in info_dict and 'id' in info_dict:
+            info_dict['display_id'] = info_dict['id']
+
+        if info_dict.get('upload_date') is None and info_dict.get('timestamp') is not None:
+            # Working around negative timestamps in Windows
+            # (see http://bugs.python.org/issue1646728)
+            if info_dict['timestamp'] < 0 and os.name == 'nt':
+                info_dict['timestamp'] = 0
+            upload_date = datetime.datetime.utcfromtimestamp(
+                info_dict['timestamp'])
+            info_dict['upload_date'] = upload_date.strftime('%Y%m%d')
+

         # This extractors handle format selection themselves
         if info_dict['extractor'] in ['Youku']:
             if download:
         # This extractors handle format selection themselves
         if info_dict['extractor'] in ['Youku']:
             if download:


@@ -688,8 +998,14 @@ class YoutubeDL(object):
         else:
             formats = info_dict['formats']
 
         else:
             formats = info_dict['formats']
 

+        if not formats:
+            raise ExtractorError('No video formats found!')
+

         # We check that all the formats have the format and format_id fields
         # We check that all the formats have the format and format_id fields

-        for (i, format) in enumerate(formats):
+        for i, format in enumerate(formats):
+            if 'url' not in format:
+                raise ExtractorError('Missing "url" key in result (index %d)' % i)
+

             if format.get('format_id') is None:
                 format['format_id'] = compat_str(i)
             if format.get('format') is None:
             if format.get('format_id') is None:
                 format['format_id'] = compat_str(i)
             if format.get('format') is None:


@@ -700,7 +1016,12 @@ class YoutubeDL(object):
                 )
             # Automatically determine file extension if missing
             if 'ext' not in format:
                 )
             # Automatically determine file extension if missing
             if 'ext' not in format:

-                format['ext'] = determine_ext(format['url'])
+                format['ext'] = determine_ext(format['url']).lower()
+            # Add HTTP headers, so that external programs can use them from the
+            # json output
+            full_format_info = info_dict.copy()
+            full_format_info.update(format)
+            format['http_headers'] = self._calc_headers(full_format_info)

 
         format_limit = self.params.get('format_limit', None)
         if format_limit:
 
         format_limit = self.params.get('format_limit', None)
         if format_limit:


@@ -716,9 +1037,12 @@ class YoutubeDL(object):
             # element in the 'formats' field in info_dict is info_dict itself,
             # wich can't be exported to json
             info_dict['formats'] = formats
             # element in the 'formats' field in info_dict is info_dict itself,
             # wich can't be exported to json
             info_dict['formats'] = formats

-        if self.params.get('listformats', None):
+        if self.params.get('listformats'):

             self.list_formats(info_dict)
             return
             self.list_formats(info_dict)
             return

+        if self.params.get('list_thumbnails'):
+            self.list_thumbnails(info_dict)
+            return

 
         req_format = self.params.get('format')
         if req_format is None:
 
         req_format = self.params.get('format')
         if req_format is None:


@@ -728,28 +1052,52 @@ class YoutubeDL(object):
         if req_format in ('-1', 'all'):
             formats_to_download = formats
         else:
         if req_format in ('-1', 'all'):
             formats_to_download = formats
         else:

-            # We can accept formats requested in the format: 34/5/best, we pick
-            # the first that is available, starting from left
-            req_formats = req_format.split('/')
-            for rf in req_formats:
-                if re.match(r'.+?\+.+?', rf) is not None:
-                    # Two formats have been requested like '137+139'
-                    format_1, format_2 = rf.split('+')
-                    formats_info = (self.select_format(format_1, formats),
-                        self.select_format(format_2, formats))
-                    if all(formats_info):
-                        selected_format = {
-                            'requested_formats': formats_info,
-                            'format': rf,
-                            'ext': formats_info[0]['ext'],
-                        }
+            for rfstr in req_format.split(','):
+                # We can accept formats requested in the format: 34/5/best, we pick
+                # the first that is available, starting from left
+                req_formats = rfstr.split('/')
+                for rf in req_formats:
+                    if re.match(r'.+?\+.+?', rf) is not None:
+                        # Two formats have been requested like '137+139'
+                        format_1, format_2 = rf.split('+')
+                        formats_info = (self.select_format(format_1, formats),
+                                        self.select_format(format_2, formats))
+                        if all(formats_info):
+                            # The first format must contain the video and the
+                            # second the audio
+                            if formats_info[0].get('vcodec') == 'none':
+                                self.report_error('The first format must '
+                                                  'contain the video, try using '
+                                                  '"-f %s+%s"' % (format_2, format_1))
+                                return
+                            output_ext = (
+                                formats_info[0]['ext']
+                                if self.params.get('merge_output_format') is None
+                                else self.params['merge_output_format'])
+                            selected_format = {
+                                'requested_formats': formats_info,
+                                'format': '%s+%s' % (formats_info[0].get('format'),
+                                                     formats_info[1].get('format')),
+                                'format_id': '%s+%s' % (formats_info[0].get('format_id'),
+                                                        formats_info[1].get('format_id')),
+                                'width': formats_info[0].get('width'),
+                                'height': formats_info[0].get('height'),
+                                'resolution': formats_info[0].get('resolution'),
+                                'fps': formats_info[0].get('fps'),
+                                'vcodec': formats_info[0].get('vcodec'),
+                                'vbr': formats_info[0].get('vbr'),
+                                'stretched_ratio': formats_info[0].get('stretched_ratio'),
+                                'acodec': formats_info[1].get('acodec'),
+                                'abr': formats_info[1].get('abr'),
+                                'ext': output_ext,
+                            }
+                        else:
+                            selected_format = None

                     else:
                     else:

-                        selected_format = None
-                else:
-                    selected_format = self.select_format(rf, formats)
-                if selected_format is not None:
-                    formats_to_download = [selected_format]
-                    break
+                        selected_format = self.select_format(rf, formats)
+                    if selected_format is not None:
+                        formats_to_download.append(selected_format)
+                        break

         if not formats_to_download:
             raise ExtractorError('requested format not available',
                                  expected=True)
         if not formats_to_download:
             raise ExtractorError('requested format not available',
                                  expected=True)


@@ -782,7 +1130,7 @@ class YoutubeDL(object):
         # Keep for backwards compatibility
         info_dict['stitle'] = info_dict['title']
 
         # Keep for backwards compatibility
         info_dict['stitle'] = info_dict['title']
 

-        if not 'format' in info_dict:
+        if 'format' not in info_dict:

             info_dict['format'] = info_dict['ext']
 
         reason = self._match_entry(info_dict)
             info_dict['format'] = info_dict['ext']
 
         reason = self._match_entry(info_dict)


@@ -792,7 +1140,7 @@ class YoutubeDL(object):
 
         self._num_downloads += 1
 
 
         self._num_downloads += 1
 

-        filename = self.prepare_filename(info_dict)
+        info_dict['_filename'] = filename = self.prepare_filename(info_dict)

 
         # Forced printings
         if self.params.get('forcetitle', False):
 
         # Forced printings
         if self.params.get('forcetitle', False):


@@ -800,8 +1148,12 @@ class YoutubeDL(object):
         if self.params.get('forceid', False):
             self.to_stdout(info_dict['id'])
         if self.params.get('forceurl', False):
         if self.params.get('forceid', False):
             self.to_stdout(info_dict['id'])
         if self.params.get('forceurl', False):

-            # For RTMP URLs, also include the playpath
-            self.to_stdout(info_dict['url'] + info_dict.get('play_path', ''))
+            if info_dict.get('requested_formats') is not None:
+                for f in info_dict['requested_formats']:
+                    self.to_stdout(f['url'] + f.get('play_path', ''))
+            else:
+                # For RTMP URLs, also include the playpath
+                self.to_stdout(info_dict['url'] + info_dict.get('play_path', ''))

         if self.params.get('forcethumbnail', False) and info_dict.get('thumbnail') is not None:
             self.to_stdout(info_dict['thumbnail'])
         if self.params.get('forcedescription', False) and info_dict.get('description') is not None:
         if self.params.get('forcethumbnail', False) and info_dict.get('thumbnail') is not None:
             self.to_stdout(info_dict['thumbnail'])
         if self.params.get('forcedescription', False) and info_dict.get('description') is not None:


@@ -813,7 +1165,6 @@ class YoutubeDL(object):
         if self.params.get('forceformat', False):
             self.to_stdout(info_dict['format'])
         if self.params.get('forcejson', False):
         if self.params.get('forceformat', False):
             self.to_stdout(info_dict['format'])
         if self.params.get('forcejson', False):

-            info_dict['_filename'] = filename

             self.to_stdout(json.dumps(info_dict))
 
         # Do nothing else if in simulate mode
             self.to_stdout(json.dumps(info_dict))
 
         # Do nothing else if in simulate mode


@@ -825,7 +1176,7 @@ class YoutubeDL(object):
 
         try:
             dn = os.path.dirname(encodeFilename(filename))
 
         try:
             dn = os.path.dirname(encodeFilename(filename))

-            if dn != '' and not os.path.exists(dn):
+            if dn and not os.path.exists(dn):

                 os.makedirs(dn)
         except (OSError, IOError) as err:
             self.report_error('unable to create directory ' + compat_str(err))
                 os.makedirs(dn)
         except (OSError, IOError) as err:
             self.report_error('unable to create directory ' + compat_str(err))


@@ -835,13 +1186,13 @@ class YoutubeDL(object):
             descfn = filename + '.description'
             if self.params.get('nooverwrites', False) and os.path.exists(encodeFilename(descfn)):
                 self.to_screen('[info] Video description is already present')
             descfn = filename + '.description'
             if self.params.get('nooverwrites', False) and os.path.exists(encodeFilename(descfn)):
                 self.to_screen('[info] Video description is already present')

+            elif info_dict.get('description') is None:
+                self.report_warning('There\'s no description to write.')

             else:
                 try:
                     self.to_screen('[info] Writing video description to: ' + descfn)
                     with io.open(encodeFilename(descfn), 'w', encoding='utf-8') as descfile:
                         descfile.write(info_dict['description'])
             else:
                 try:
                     self.to_screen('[info] Writing video description to: ' + descfn)
                     with io.open(encodeFilename(descfn), 'w', encoding='utf-8') as descfile:
                         descfile.write(info_dict['description'])

-                except (KeyError, TypeError):
-                    self.report_warning('There\'s no description to write.')

                 except (OSError, IOError):
                     self.report_error('Cannot write description file ' + descfn)
                     return
                 except (OSError, IOError):
                     self.report_error('Cannot write description file ' + descfn)
                     return


@@ -880,9 +1231,9 @@ class YoutubeDL(object):
                     else:
                         self.to_screen('[info] Writing video subtitles to: ' + sub_filename)
                         with io.open(encodeFilename(sub_filename), 'w', encoding='utf-8') as subfile:
                     else:
                         self.to_screen('[info] Writing video subtitles to: ' + sub_filename)
                         with io.open(encodeFilename(sub_filename), 'w', encoding='utf-8') as subfile:

-                                subfile.write(sub)
+                            subfile.write(sub)

                 except (OSError, IOError):
                 except (OSError, IOError):

-                    self.report_error('Cannot write subtitles file ' + descfn)
+                    self.report_error('Cannot write subtitles file ' + sub_filename)

                     return
 
         if self.params.get('writeinfojson', False):
                     return
 
         if self.params.get('writeinfojson', False):


@@ -892,99 +1243,122 @@ class YoutubeDL(object):
             else:
                 self.to_screen('[info] Writing video description metadata as JSON to: ' + infofn)
                 try:
             else:
                 self.to_screen('[info] Writing video description metadata as JSON to: ' + infofn)
                 try:

-                    write_json_file(info_dict, encodeFilename(infofn))
+                    write_json_file(info_dict, infofn)

                 except (OSError, IOError):
                     self.report_error('Cannot write metadata to JSON file ' + infofn)
                     return
 
                 except (OSError, IOError):
                     self.report_error('Cannot write metadata to JSON file ' + infofn)
                     return
 

-        if self.params.get('writethumbnail', False):
-            if info_dict.get('thumbnail') is not None:
-                thumb_format = determine_ext(info_dict['thumbnail'], 'jpg')
-                thumb_filename = os.path.splitext(filename)[0] + '.' + thumb_format
-                if self.params.get('nooverwrites', False) and os.path.exists(encodeFilename(thumb_filename)):
-                    self.to_screen('[%s] %s: Thumbnail is already present' %
-                                   (info_dict['extractor'], info_dict['id']))
-                else:
-                    self.to_screen('[%s] %s: Downloading thumbnail ...' %
-                                   (info_dict['extractor'], info_dict['id']))
-                    try:
-                        uf = compat_urllib_request.urlopen(info_dict['thumbnail'])
-                        with open(thumb_filename, 'wb') as thumbf:
-                            shutil.copyfileobj(uf, thumbf)
-                        self.to_screen('[%s] %s: Writing thumbnail to: %s' %
-                            (info_dict['extractor'], info_dict['id'], thumb_filename))
-                    except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-                        self.report_warning('Unable to download thumbnail "%s": %s' %
-                            (info_dict['thumbnail'], compat_str(err)))
+        self._write_thumbnails(info_dict, filename)

 
         if not self.params.get('skip_download', False):
 
         if not self.params.get('skip_download', False):

-            if self.params.get('nooverwrites', False) and os.path.exists(encodeFilename(filename)):
-                success = True
-            else:
-                try:
-                    def dl(name, info):
-                        fd = get_suitable_downloader(info)(self, self.params)
-                        for ph in self._progress_hooks:
-                            fd.add_progress_hook(ph)
-                        return fd.download(name, info)
-                    if info_dict.get('requested_formats') is not None:
-                        downloaded = []
-                        success = True
-                        merger = FFmpegMergerPP(self)
-                        if not merger._get_executable():
-                            postprocessors = []
-                            self.report_warning('You have requested multiple '
-                                'formats but ffmpeg or avconv are not installed.'
-                                ' The formats won\'t be merged')
-                        else:
-                            postprocessors = [merger]
-                        for f in info_dict['requested_formats']:
-                            new_info = dict(info_dict)
-                            new_info.update(f)
-                            fname = self.prepare_filename(new_info)
-                            fname = prepend_extension(fname, 'f%s' % f['format_id'])
-                            downloaded.append(fname)
-                            partial_success = dl(fname, new_info)
-                            success = success and partial_success
-                        info_dict['__postprocessors'] = postprocessors
-                        info_dict['__files_to_merge'] = downloaded
+            try:
+                def dl(name, info):
+                    fd = get_suitable_downloader(info, self.params)(self, self.params)
+                    for ph in self._progress_hooks:
+                        fd.add_progress_hook(ph)
+                    if self.params.get('verbose'):
+                        self.to_stdout('[debug] Invoking downloader on %r' % info.get('url'))
+                    return fd.download(name, info)
+
+                if info_dict.get('requested_formats') is not None:
+                    downloaded = []
+                    success = True
+                    merger = FFmpegMergerPP(self, not self.params.get('keepvideo'))
+                    if not merger._executable:
+                        postprocessors = []
+                        self.report_warning('You have requested multiple '
+                                            'formats but ffmpeg or avconv are not installed.'
+                                            ' The formats won\'t be merged')

                     else:
                     else:

-                        # Just a single file
-                        success = dl(filename, info_dict)
-                except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
-                    self.report_error('unable to download video data: %s' % str(err))
-                    return
-                except (OSError, IOError) as err:
-                    raise UnavailableVideoError(err)
-                except (ContentTooShortError, ) as err:
-                    self.report_error('content too short (expected %s bytes and served %s)' % (err.expected, err.downloaded))
-                    return
+                        postprocessors = [merger]
+                    for f in info_dict['requested_formats']:
+                        new_info = dict(info_dict)
+                        new_info.update(f)
+                        fname = self.prepare_filename(new_info)
+                        fname = prepend_extension(fname, 'f%s' % f['format_id'])
+                        downloaded.append(fname)
+                        partial_success = dl(fname, new_info)
+                        success = success and partial_success
+                    info_dict['__postprocessors'] = postprocessors
+                    info_dict['__files_to_merge'] = downloaded
+                else:
+                    # Just a single file
+                    success = dl(filename, info_dict)
+            except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
+                self.report_error('unable to download video data: %s' % str(err))
+                return
+            except (OSError, IOError) as err:
+                raise UnavailableVideoError(err)
+            except (ContentTooShortError, ) as err:
+                self.report_error('content too short (expected %s bytes and served %s)' % (err.expected, err.downloaded))
+                return

 
             if success:
 
             if success:

+                # Fixup content
+                fixup_policy = self.params.get('fixup')
+                if fixup_policy is None:
+                    fixup_policy = 'detect_or_warn'
+
+                stretched_ratio = info_dict.get('stretched_ratio')
+                if stretched_ratio is not None and stretched_ratio != 1:
+                    if fixup_policy == 'warn':
+                        self.report_warning('%s: Non-uniform pixel ratio (%s)' % (
+                            info_dict['id'], stretched_ratio))
+                    elif fixup_policy == 'detect_or_warn':
+                        stretched_pp = FFmpegFixupStretchedPP(self)
+                        if stretched_pp.available:
+                            info_dict.setdefault('__postprocessors', [])
+                            info_dict['__postprocessors'].append(stretched_pp)
+                        else:
+                            self.report_warning(
+                                '%s: Non-uniform pixel ratio (%s). Install ffmpeg or avconv to fix this automatically.' % (
+                                    info_dict['id'], stretched_ratio))
+                    else:
+                        assert fixup_policy in ('ignore', 'never')
+
+                if info_dict.get('requested_formats') is None and info_dict.get('container') == 'm4a_dash':
+                    if fixup_policy == 'warn':
+                        self.report_warning('%s: writing DASH m4a. Only some players support this container.' % (
+                            info_dict['id']))
+                    elif fixup_policy == 'detect_or_warn':
+                        fixup_pp = FFmpegFixupM4aPP(self)
+                        if fixup_pp.available:
+                            info_dict.setdefault('__postprocessors', [])
+                            info_dict['__postprocessors'].append(fixup_pp)
+                        else:
+                            self.report_warning(
+                                '%s: writing DASH m4a. Only some players support this container. Install ffmpeg or avconv to fix this automatically.' % (
+                                    info_dict['id']))
+                    else:
+                        assert fixup_policy in ('ignore', 'never')
+

                 try:
                     self.post_process(filename, info_dict)
                 except (PostProcessingError) as err:
                     self.report_error('postprocessing: %s' % str(err))
                     return
                 try:
                     self.post_process(filename, info_dict)
                 except (PostProcessingError) as err:
                     self.report_error('postprocessing: %s' % str(err))
                     return

-
-        self.record_download_archive(info_dict)
+                self.record_download_archive(info_dict)

 
     def download(self, url_list):
         """Download a given list of URLs."""
 
     def download(self, url_list):
         """Download a given list of URLs."""

+        outtmpl = self.params.get('outtmpl', DEFAULT_OUTTMPL)

         if (len(url_list) > 1 and
         if (len(url_list) > 1 and

-                '%' not in self.params['outtmpl']
+                '%' not in outtmpl

                 and self.params.get('max_downloads') != 1):
                 and self.params.get('max_downloads') != 1):

-            raise SameFileError(self.params['outtmpl'])
+            raise SameFileError(outtmpl)

 
         for url in url_list:
             try:
 
         for url in url_list:
             try:

-                #It also downloads the videos
-                self.extract_info(url)
+                # It also downloads the videos
+                res = self.extract_info(url)

             except UnavailableVideoError:
                 self.report_error('unable to download video')
             except MaxDownloadsReached:
                 self.to_screen('[info] Maximum number of downloaded files reached.')
                 raise
             except UnavailableVideoError:
                 self.report_error('unable to download video')
             except MaxDownloadsReached:
                 self.to_screen('[info] Maximum number of downloaded files reached.')
                 raise

+            else:
+                if self.params.get('dump_single_json', False):
+                    self.to_stdout(json.dumps(res))

 
         return self._download_retcode
 
 
         return self._download_retcode
 


@@ -1006,14 +1380,15 @@ class YoutubeDL(object):
         """Run all the postprocessors on the given file."""
         info = dict(ie_info)
         info['filepath'] = filename
         """Run all the postprocessors on the given file."""
         info = dict(ie_info)
         info['filepath'] = filename

-        keep_video = None

         pps_chain = []
         if ie_info.get('__postprocessors') is not None:
             pps_chain.extend(ie_info['__postprocessors'])
         pps_chain.extend(self._pps)
         for pp in pps_chain:
         pps_chain = []
         if ie_info.get('__postprocessors') is not None:
             pps_chain.extend(ie_info['__postprocessors'])
         pps_chain.extend(self._pps)
         for pp in pps_chain:

+            keep_video = None
+            old_filename = info['filepath']

             try:
             try:

-                keep_video_wish, new_info = pp.run(info)
+                keep_video_wish, info = pp.run(info)

                 if keep_video_wish is not None:
                     if keep_video_wish:
                         keep_video = keep_video_wish
                 if keep_video_wish is not None:
                     if keep_video_wish:
                         keep_video = keep_video_wish


@@ -1022,12 +1397,12 @@ class YoutubeDL(object):
                         keep_video = keep_video_wish
             except PostProcessingError as e:
                 self.report_error(e.msg)
                         keep_video = keep_video_wish
             except PostProcessingError as e:
                 self.report_error(e.msg)

-        if keep_video is False and not self.params.get('keepvideo', False):
-            try:
-                self.to_screen('Deleting original file %s (pass -k to keep)' % filename)
-                os.remove(encodeFilename(filename))
-            except (IOError, OSError):
-                self.report_warning('Unable to remove downloaded video file')
+            if keep_video is False and not self.params.get('keepvideo', False):
+                try:
+                    self.to_screen('Deleting original file %s (pass -k to keep)' % old_filename)
+                    os.remove(encodeFilename(old_filename))
+                except (IOError, OSError):
+                    self.report_warning('Unable to remove downloaded video file')

 
     def _make_archive_id(self, info_dict):
         # Future-proof against any change in case
 
     def _make_archive_id(self, info_dict):
         # Future-proof against any change in case


@@ -1085,81 +1460,143 @@ class YoutubeDL(object):
             res = default
         return res
 
             res = default
         return res
 

-    def list_formats(self, info_dict):
-        def format_note(fdict):
-            res = ''
-            if fdict.get('ext') in ['f4f', 'f4m']:
-                res += '(unsupported) '
-            if fdict.get('format_note') is not None:
-                res += fdict['format_note'] + ' '
-            if fdict.get('tbr') is not None:
-                res += '%4dk ' % fdict['tbr']
-            if fdict.get('container') is not None:
-                if res:
-                    res += ', '
-                res += '%s container' % fdict['container']
-            if (fdict.get('vcodec') is not None and
-                    fdict.get('vcodec') != 'none'):
-                if res:
-                    res += ', '
-                res += fdict['vcodec']
-                if fdict.get('vbr') is not None:
-                    res += '@'
-            elif fdict.get('vbr') is not None and fdict.get('abr') is not None:
-                res += 'video@'
+    def _format_note(self, fdict):
+        res = ''
+        if fdict.get('ext') in ['f4f', 'f4m']:
+            res += '(unsupported) '
+        if fdict.get('format_note') is not None:
+            res += fdict['format_note'] + ' '
+        if fdict.get('tbr') is not None:
+            res += '%4dk ' % fdict['tbr']
+        if fdict.get('container') is not None:
+            if res:
+                res += ', '
+            res += '%s container' % fdict['container']
+        if (fdict.get('vcodec') is not None and
+                fdict.get('vcodec') != 'none'):
+            if res:
+                res += ', '
+            res += fdict['vcodec']

             if fdict.get('vbr') is not None:
             if fdict.get('vbr') is not None:

-                res += '%4dk' % fdict['vbr']
-            if fdict.get('acodec') is not None:
-                if res:
-                    res += ', '
-                if fdict['acodec'] == 'none':
-                    res += 'video only'
-                else:
-                    res += '%-5s' % fdict['acodec']
-            elif fdict.get('abr') is not None:
-                if res:
-                    res += ', '
-                res += 'audio'
-            if fdict.get('abr') is not None:
-                res += '@%3dk' % fdict['abr']
-            if fdict.get('asr') is not None:
-                res += ' (%5dHz)' % fdict['asr']
-            if fdict.get('filesize') is not None:
-                if res:
-                    res += ', '
-                res += format_bytes(fdict['filesize'])
-            return res
+                res += '@'
+        elif fdict.get('vbr') is not None and fdict.get('abr') is not None:
+            res += 'video@'
+        if fdict.get('vbr') is not None:
+            res += '%4dk' % fdict['vbr']
+        if fdict.get('fps') is not None:
+            res += ', %sfps' % fdict['fps']
+        if fdict.get('acodec') is not None:
+            if res:
+                res += ', '
+            if fdict['acodec'] == 'none':
+                res += 'video only'
+            else:
+                res += '%-5s' % fdict['acodec']
+        elif fdict.get('abr') is not None:
+            if res:
+                res += ', '
+            res += 'audio'
+        if fdict.get('abr') is not None:
+            res += '@%3dk' % fdict['abr']
+        if fdict.get('asr') is not None:
+            res += ' (%5dHz)' % fdict['asr']
+        if fdict.get('filesize') is not None:
+            if res:
+                res += ', '
+            res += format_bytes(fdict['filesize'])
+        elif fdict.get('filesize_approx') is not None:
+            if res:
+                res += ', '
+            res += '~' + format_bytes(fdict['filesize_approx'])
+        return res

 
 

+    def list_formats(self, info_dict):

         def line(format, idlen=20):
             return (('%-' + compat_str(idlen + 1) + 's%-10s%-12s%s') % (
                 format['format_id'],
                 format['ext'],
                 self.format_resolution(format),
         def line(format, idlen=20):
             return (('%-' + compat_str(idlen + 1) + 's%-10s%-12s%s') % (
                 format['format_id'],
                 format['ext'],
                 self.format_resolution(format),

-                format_note(format),
+                self._format_note(format),

             ))
 
         formats = info_dict.get('formats', [info_dict])
         idlen = max(len('format code'),
                     max(len(f['format_id']) for f in formats))
             ))
 
         formats = info_dict.get('formats', [info_dict])
         idlen = max(len('format code'),
                     max(len(f['format_id']) for f in formats))

-        formats_s = [line(f, idlen) for f in formats]
+        formats_s = [
+            line(f, idlen) for f in formats
+            if f.get('preference') is None or f['preference'] >= -1000]

         if len(formats) > 1:
         if len(formats) > 1:

-            formats_s[0] += (' ' if format_note(formats[0]) else '') + '(worst)'
-            formats_s[-1] += (' ' if format_note(formats[-1]) else '') + '(best)'
+            formats_s[0] += (' ' if self._format_note(formats[0]) else '') + '(worst)'
+            formats_s[-1] += (' ' if self._format_note(formats[-1]) else '') + '(best)'

 
         header_line = line({
             'format_id': 'format code', 'ext': 'extension',
             'resolution': 'resolution', 'format_note': 'note'}, idlen=idlen)
 
         header_line = line({
             'format_id': 'format code', 'ext': 'extension',
             'resolution': 'resolution', 'format_note': 'note'}, idlen=idlen)

-        self.to_screen('[info] Available formats for %s:\n%s\n%s' %
-                       (info_dict['id'], header_line, '\n'.join(formats_s)))
+        self.to_screen(
+            '[info] Available formats for %s:\n%s\n%s' %
+            (info_dict['id'], header_line, '\n'.join(formats_s)))
+
+    def list_thumbnails(self, info_dict):
+        thumbnails = info_dict.get('thumbnails')
+        if not thumbnails:
+            tn_url = info_dict.get('thumbnail')
+            if tn_url:
+                thumbnails = [{'id': '0', 'url': tn_url}]
+            else:
+                self.to_screen(
+                    '[info] No thumbnails present for %s' % info_dict['id'])
+                return
+
+        self.to_screen(
+            '[info] Thumbnails for %s:' % info_dict['id'])
+        self.to_screen(render_table(
+            ['ID', 'width', 'height', 'URL'],
+            [[t['id'], t.get('width', 'unknown'), t.get('height', 'unknown'), t['url']] for t in thumbnails]))

 
     def urlopen(self, req):
         """ Start an HTTP download """
 
     def urlopen(self, req):
         """ Start an HTTP download """

-        return self._opener.open(req)
+
+        # According to RFC 3986, URLs can not contain non-ASCII characters, however this is not
+        # always respected by websites, some tend to give out URLs with non percent-encoded
+        # non-ASCII characters (see telemb.py, ard.py [#3412])
+        # urllib chokes on URLs with non-ASCII characters (see http://bugs.python.org/issue3991)
+        # To work around aforementioned issue we will replace request's original URL with
+        # percent-encoded one
+        req_is_string = isinstance(req, compat_basestring)
+        url = req if req_is_string else req.get_full_url()
+        url_escaped = escape_url(url)
+
+        # Substitute URL if any change after escaping
+        if url != url_escaped:
+            if req_is_string:
+                req = url_escaped
+            else:
+                req = compat_urllib_request.Request(
+                    url_escaped, data=req.data, headers=req.headers,
+                    origin_req_host=req.origin_req_host, unverifiable=req.unverifiable)
+
+        return self._opener.open(req, timeout=self._socket_timeout)

 
     def print_debug_header(self):
         if not self.params.get('verbose'):
             return
 
     def print_debug_header(self):
         if not self.params.get('verbose'):
             return

-        write_string('[debug] youtube-dl version ' + __version__ + '\n')
+
+        if type('') is not compat_str:
+            # Python 2.6 on SLES11 SP1 (https://github.com/rg3/youtube-dl/issues/3326)
+            self.report_warning(
+                'Your Python is broken! Update to a newer and supported version')
+
+        stdout_encoding = getattr(
+            sys.stdout, 'encoding', 'missing (%s)' % type(sys.stdout).__name__)
+        encoding_str = (
+            '[debug] Encodings: locale %s, fs %s, out %s, pref %s\n' % (
+                locale.getpreferredencoding(),
+                sys.getfilesystemencoding(),
+                stdout_encoding,
+                self.get_encoding()))
+        write_string(encoding_str, encoding=None)
+
+        self._write_string('[debug] youtube-dl version ' + __version__ + '\n')

         try:
             sp = subprocess.Popen(
                 ['git', 'rev-parse', '--short', 'HEAD'],
         try:
             sp = subprocess.Popen(
                 ['git', 'rev-parse', '--short', 'HEAD'],


@@ -1168,24 +1605,46 @@ class YoutubeDL(object):
             out, err = sp.communicate()
             out = out.decode().strip()
             if re.match('[0-9a-f]+', out):
             out, err = sp.communicate()
             out = out.decode().strip()
             if re.match('[0-9a-f]+', out):

-                write_string('[debug] Git HEAD: ' + out + '\n')
+                self._write_string('[debug] Git HEAD: ' + out + '\n')

         except:
             try:
                 sys.exc_clear()
             except:
                 pass
         except:
             try:
                 sys.exc_clear()
             except:
                 pass

-        write_string('[debug] Python version %s - %s' %
-                     (platform.python_version(), platform_name()) + '\n')
+        self._write_string('[debug] Python version %s - %s\n' % (
+            platform.python_version(), platform_name()))
+
+        exe_versions = FFmpegPostProcessor.get_versions()
+        exe_versions['rtmpdump'] = rtmpdump_version()
+        exe_str = ', '.join(
+            '%s %s' % (exe, v)
+            for exe, v in sorted(exe_versions.items())
+            if v
+        )
+        if not exe_str:
+            exe_str = 'none'
+        self._write_string('[debug] exe versions: %s\n' % exe_str)

 
         proxy_map = {}
         for handler in self._opener.handlers:
             if hasattr(handler, 'proxies'):
                 proxy_map.update(handler.proxies)
 
         proxy_map = {}
         for handler in self._opener.handlers:
             if hasattr(handler, 'proxies'):
                 proxy_map.update(handler.proxies)

-        write_string('[debug] Proxy map: ' + compat_str(proxy_map) + '\n')
+        self._write_string('[debug] Proxy map: ' + compat_str(proxy_map) + '\n')
+
+        if self.params.get('call_home', False):
+            ipaddr = self.urlopen('https://yt-dl.org/ip').read().decode('utf-8')
+            self._write_string('[debug] Public IP address: %s\n' % ipaddr)
+            latest_version = self.urlopen(
+                'https://yt-dl.org/latest/version').read().decode('utf-8')
+            if version_tuple(latest_version) > version_tuple(__version__):
+                self.report_warning(
+                    'You are using an outdated version (newest version: %s)! '
+                    'See https://yt-dl.org/update if you need help updating.' %
+                    latest_version)

 
     def _setup_opener(self):
         timeout_val = self.params.get('socket_timeout')
 
     def _setup_opener(self):
         timeout_val = self.params.get('socket_timeout')

-        timeout = 600 if timeout_val is None else float(timeout_val)
+        self._socket_timeout = 600 if timeout_val is None else float(timeout_val)

 
         opts_cookiefile = self.params.get('cookiefile')
         opts_proxy = self.params.get('proxy')
 
         opts_cookiefile = self.params.get('cookiefile')
         opts_proxy = self.params.get('proxy')


@@ -1213,9 +1672,8 @@ class YoutubeDL(object):
         proxy_handler = compat_urllib_request.ProxyHandler(proxies)
 
         debuglevel = 1 if self.params.get('debug_printtraffic') else 0
         proxy_handler = compat_urllib_request.ProxyHandler(proxies)
 
         debuglevel = 1 if self.params.get('debug_printtraffic') else 0

-        https_handler = make_HTTPS_handler(
-            self.params.get('nocheckcertificate', False), debuglevel=debuglevel)
-        ydlh = YoutubeDLHandler(debuglevel=debuglevel)
+        https_handler = make_HTTPS_handler(self.params, debuglevel=debuglevel)
+        ydlh = YoutubeDLHandler(self.params, debuglevel=debuglevel)

         opener = compat_urllib_request.build_opener(
             https_handler, proxy_handler, cookie_processor, ydlh)
         # Delete the default user-agent header, which would otherwise apply in
         opener = compat_urllib_request.build_opener(
             https_handler, proxy_handler, cookie_processor, ydlh)
         # Delete the default user-agent header, which would otherwise apply in


@@ -1224,6 +1682,54 @@ class YoutubeDL(object):
         opener.addheaders = []
         self._opener = opener
 
         opener.addheaders = []
         self._opener = opener
 

-        # TODO remove this global modification
-        compat_urllib_request.install_opener(opener)
-        socket.setdefaulttimeout(timeout)
+    def encode(self, s):
+        if isinstance(s, bytes):
+            return s  # Already encoded
+
+        try:
+            return s.encode(self.get_encoding())
+        except UnicodeEncodeError as err:
+            err.reason = err.reason + '. Check your system encoding configuration or use the --encoding option.'
+            raise
+
+    def get_encoding(self):
+        encoding = self.params.get('encoding')
+        if encoding is None:
+            encoding = preferredencoding()
+        return encoding
+
+    def _write_thumbnails(self, info_dict, filename):
+        if self.params.get('writethumbnail', False):
+            thumbnails = info_dict.get('thumbnails')
+            if thumbnails:
+                thumbnails = [thumbnails[-1]]
+        elif self.params.get('write_all_thumbnails', False):
+            thumbnails = info_dict.get('thumbnails')
+        else:
+            return
+
+        if not thumbnails:
+            # No thumbnails present, so return immediately
+            return
+
+        for t in thumbnails:
+            thumb_ext = determine_ext(t['url'], 'jpg')
+            suffix = '_%s' % t['id'] if len(thumbnails) > 1 else ''
+            thumb_display_id = '%s ' % t['id'] if len(thumbnails) > 1 else ''
+            thumb_filename = os.path.splitext(filename)[0] + suffix + '.' + thumb_ext
+
+            if self.params.get('nooverwrites', False) and os.path.exists(encodeFilename(thumb_filename)):
+                self.to_screen('[%s] %s: Thumbnail %sis already present' %
+                               (info_dict['extractor'], info_dict['id'], thumb_display_id))
+            else:
+                self.to_screen('[%s] %s: Downloading thumbnail %s...' %
+                               (info_dict['extractor'], info_dict['id'], thumb_display_id))
+                try:
+                    uf = self.urlopen(t['url'])
+                    with open(thumb_filename, 'wb') as thumbf:
+                        shutil.copyfileobj(uf, thumbf)
+                    self.to_screen('[%s] %s: Writing thumbnail %sto: %s' %
+                                   (info_dict['extractor'], info_dict['id'], thumb_display_id, thumb_filename))
+                except (compat_urllib_error.URLError, compat_http_client.HTTPException, socket.error) as err:
+                    self.report_warning('Unable to download thumbnail "%s": %s' %
+                                        (t['url'], compat_str(err)))