debian/control: Prefer ffmpeg to libav-tools in Recommends.

[youtubedl] / youtube_dl / __init__.py

diff --git a/youtube_dl/__init__.py b/youtube_dl/__init__.py
index 3c968082c3e69fbd38bf229905cd3469cef88ab3..55b22c889f97c73d28e732466f850bcfb1615c83 100644 (file)
--- a/youtube_dl/__init__.py
+++ b/youtube_dl/__init__.py
@@ -1,26 +1,33 @@
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 
 #!/usr/bin/env python
 # -*- coding: utf-8 -*-
 

+from __future__ import unicode_literals
+

 __license__ = 'Public Domain'
 
 import codecs
 import io
 import os
 import random
 __license__ = 'Public Domain'
 
 import codecs
 import io
 import os
 import random

+import shlex

 import sys
 
 
 from .options import (
     parseOpts,
 )
 import sys
 
 
 from .options import (
     parseOpts,
 )

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

     compat_expanduser,
     compat_getpass,
     compat_print,
     compat_expanduser,
     compat_getpass,
     compat_print,

+    workaround_optparse_bug9161,
+)
+from .utils import (

     DateRange,
     DateRange,

-    DEFAULT_OUTTMPL,

     decodeOption,
     decodeOption,

+    DEFAULT_OUTTMPL,

     DownloadError,
     DownloadError,

+    match_filter_func,

     MaxDownloadsReached,
     preferredencoding,
     read_batch_urls,
     MaxDownloadsReached,
     preferredencoding,
     read_batch_urls,


@@ -33,18 +40,8 @@ from .update import update_self
 from .downloader import (
     FileDownloader,
 )
 from .downloader import (
     FileDownloader,
 )

-from .extractor import gen_extractors
+from .extractor import gen_extractors, list_extractors

 from .YoutubeDL import YoutubeDL
 from .YoutubeDL import YoutubeDL

-from .postprocessor import (
-    AtomicParsleyPP,
-    FFmpegAudioFixPP,
-    FFmpegMetadataPP,
-    FFmpegVideoConvertor,
-    FFmpegExtractAudioPP,
-    FFmpegEmbedSubtitlePP,
-    XAttrMetadataPP,
-    ExecAfterDownloadPP,
-)

 
 
 def _real_main(argv=None):
 
 
 def _real_main(argv=None):


@@ -53,7 +50,9 @@ def _real_main(argv=None):
         # https://github.com/rg3/youtube-dl/issues/820
         codecs.register(lambda name: codecs.lookup('utf-8') if name == 'cp65001' else None)
 
         # https://github.com/rg3/youtube-dl/issues/820
         codecs.register(lambda name: codecs.lookup('utf-8') if name == 'cp65001' else None)
 

-    setproctitle(u'youtube-dl')
+    workaround_optparse_bug9161()
+
+    setproctitle('youtube-dl')

 
     parser, opts, args = parseOpts(argv)
 
 
     parser, opts, args = parseOpts(argv)
 


@@ -69,10 +68,10 @@ def _real_main(argv=None):
     if opts.headers is not None:
         for h in opts.headers:
             if h.find(':', 1) < 0:
     if opts.headers is not None:
         for h in opts.headers:
             if h.find(':', 1) < 0:

-                parser.error(u'wrong header formatting, it should be key:value, not "%s"'%h)
+                parser.error('wrong header formatting, it should be key:value, not "%s"' % h)

             key, value = h.split(':', 2)
             if opts.verbose:
             key, value = h.split(':', 2)
             if opts.verbose:

-                write_string(u'[debug] Adding header from command line option %s:%s\n'%(key, value))
+                write_string('[debug] Adding header from command line option %s:%s\n' % (key, value))

             std_headers[key] = value
 
     # Dump user agent
             std_headers[key] = value
 
     # Dump user agent


@@ -90,88 +89,92 @@ def _real_main(argv=None):
                 batchfd = io.open(opts.batchfile, 'r', encoding='utf-8', errors='ignore')
             batch_urls = read_batch_urls(batchfd)
             if opts.verbose:
                 batchfd = io.open(opts.batchfile, 'r', encoding='utf-8', errors='ignore')
             batch_urls = read_batch_urls(batchfd)
             if opts.verbose:

-                write_string(u'[debug] Batch file urls: ' + repr(batch_urls) + u'\n')
+                write_string('[debug] Batch file urls: ' + repr(batch_urls) + '\n')

         except IOError:
         except IOError:

-            sys.exit(u'ERROR: batch file could not be read')
+            sys.exit('ERROR: batch file could not be read')

     all_urls = batch_urls + args
     all_urls = [url.strip() for url in all_urls]
     _enc = preferredencoding()
     all_urls = [url.decode(_enc, 'ignore') if isinstance(url, bytes) else url for url in all_urls]
 
     all_urls = batch_urls + args
     all_urls = [url.strip() for url in all_urls]
     _enc = preferredencoding()
     all_urls = [url.decode(_enc, 'ignore') if isinstance(url, bytes) else url for url in all_urls]
 

-    extractors = gen_extractors()
-

     if opts.list_extractors:
     if opts.list_extractors:

-        for ie in sorted(extractors, key=lambda ie: ie.IE_NAME.lower()):
+        for ie in list_extractors(opts.age_limit):

             compat_print(ie.IE_NAME + (' (CURRENTLY BROKEN)' if not ie._WORKING else ''))
             matchedUrls = [url for url in all_urls if ie.suitable(url)]
             for mu in matchedUrls:
             compat_print(ie.IE_NAME + (' (CURRENTLY BROKEN)' if not ie._WORKING else ''))
             matchedUrls = [url for url in all_urls if ie.suitable(url)]
             for mu in matchedUrls:

-                compat_print(u'  ' + mu)
+                compat_print('  ' + mu)

         sys.exit(0)
     if opts.list_extractor_descriptions:
         sys.exit(0)
     if opts.list_extractor_descriptions:

-        for ie in sorted(extractors, key=lambda ie: ie.IE_NAME.lower()):
+        for ie in list_extractors(opts.age_limit):

             if not ie._WORKING:
                 continue
             desc = getattr(ie, 'IE_DESC', ie.IE_NAME)
             if desc is False:
                 continue
             if hasattr(ie, 'SEARCH_KEY'):
             if not ie._WORKING:
                 continue
             desc = getattr(ie, 'IE_DESC', ie.IE_NAME)
             if desc is False:
                 continue
             if hasattr(ie, 'SEARCH_KEY'):

-                _SEARCHES = (u'cute kittens', u'slithering pythons', u'falling cat', u'angry poodle', u'purple fish', u'running tortoise', u'sleeping bunny')
-                _COUNTS = (u'', u'5', u'10', u'all')
-                desc += u' (Example: "%s%s:%s" )' % (ie.SEARCH_KEY, random.choice(_COUNTS), random.choice(_SEARCHES))
+                _SEARCHES = ('cute kittens', 'slithering pythons', 'falling cat', 'angry poodle', 'purple fish', 'running tortoise', 'sleeping bunny', 'burping cow')
+                _COUNTS = ('', '5', '10', 'all')
+                desc += ' (Example: "%s%s:%s" )' % (ie.SEARCH_KEY, random.choice(_COUNTS), random.choice(_SEARCHES))

             compat_print(desc)
         sys.exit(0)
 
             compat_print(desc)
         sys.exit(0)
 

-

     # Conflicting, missing and erroneous options
     if opts.usenetrc and (opts.username is not None or opts.password is not None):
     # Conflicting, missing and erroneous options
     if opts.usenetrc and (opts.username is not None or opts.password is not None):

-        parser.error(u'using .netrc conflicts with giving username/password')
+        parser.error('using .netrc conflicts with giving username/password')

     if opts.password is not None and opts.username is None:
     if opts.password is not None and opts.username is None:

-        parser.error(u'account username missing\n')
+        parser.error('account username missing\n')

     if opts.outtmpl is not None and (opts.usetitle or opts.autonumber or opts.useid):
     if opts.outtmpl is not None and (opts.usetitle or opts.autonumber or opts.useid):

-        parser.error(u'using output template conflicts with using title, video ID or auto number')
+        parser.error('using output template conflicts with using title, video ID or auto number')

     if opts.usetitle and opts.useid:
     if opts.usetitle and opts.useid:

-        parser.error(u'using title conflicts with using video ID')
+        parser.error('using title conflicts with using video ID')

     if opts.username is not None and opts.password is None:
     if opts.username is not None and opts.password is None:

-        opts.password = compat_getpass(u'Type account password and press [Return]: ')
+        opts.password = compat_getpass('Type account password and press [Return]: ')

     if opts.ratelimit is not None:
         numeric_limit = FileDownloader.parse_bytes(opts.ratelimit)
         if numeric_limit is None:
     if opts.ratelimit is not None:
         numeric_limit = FileDownloader.parse_bytes(opts.ratelimit)
         if numeric_limit is None:

-            parser.error(u'invalid rate limit specified')
+            parser.error('invalid rate limit specified')

         opts.ratelimit = numeric_limit
     if opts.min_filesize is not None:
         numeric_limit = FileDownloader.parse_bytes(opts.min_filesize)
         if numeric_limit is None:
         opts.ratelimit = numeric_limit
     if opts.min_filesize is not None:
         numeric_limit = FileDownloader.parse_bytes(opts.min_filesize)
         if numeric_limit is None:

-            parser.error(u'invalid min_filesize specified')
+            parser.error('invalid min_filesize specified')

         opts.min_filesize = numeric_limit
     if opts.max_filesize is not None:
         numeric_limit = FileDownloader.parse_bytes(opts.max_filesize)
         if numeric_limit is None:
         opts.min_filesize = numeric_limit
     if opts.max_filesize is not None:
         numeric_limit = FileDownloader.parse_bytes(opts.max_filesize)
         if numeric_limit is None:

-            parser.error(u'invalid max_filesize specified')
+            parser.error('invalid max_filesize specified')

         opts.max_filesize = numeric_limit
     if opts.retries is not None:
         opts.max_filesize = numeric_limit
     if opts.retries is not None:

-        try:
-            opts.retries = int(opts.retries)
-        except (TypeError, ValueError):
-            parser.error(u'invalid retry count specified')
+        if opts.retries in ('inf', 'infinite'):
+            opts_retries = float('inf')
+        else:
+            try:
+                opts_retries = int(opts.retries)
+            except (TypeError, ValueError):
+                parser.error('invalid retry count specified')

     if opts.buffersize is not None:
         numeric_buffersize = FileDownloader.parse_bytes(opts.buffersize)
         if numeric_buffersize is None:
     if opts.buffersize is not None:
         numeric_buffersize = FileDownloader.parse_bytes(opts.buffersize)
         if numeric_buffersize is None:

-            parser.error(u'invalid buffer size specified')
+            parser.error('invalid buffer size specified')

         opts.buffersize = numeric_buffersize
     if opts.playliststart <= 0:
         opts.buffersize = numeric_buffersize
     if opts.playliststart <= 0:

-        raise ValueError(u'Playlist start must be positive')
+        raise ValueError('Playlist start must be positive')

     if opts.playlistend not in (-1, None) and opts.playlistend < opts.playliststart:
     if opts.playlistend not in (-1, None) and opts.playlistend < opts.playliststart:

-        raise ValueError(u'Playlist end must be greater than playlist start')
+        raise ValueError('Playlist end must be greater than playlist start')

     if opts.extractaudio:
         if opts.audioformat not in ['best', 'aac', 'mp3', 'm4a', 'opus', 'vorbis', 'wav']:
     if opts.extractaudio:
         if opts.audioformat not in ['best', 'aac', 'mp3', 'm4a', 'opus', 'vorbis', 'wav']:

-            parser.error(u'invalid audio format specified')
+            parser.error('invalid audio format specified')

     if opts.audioquality:
         opts.audioquality = opts.audioquality.strip('k').strip('K')
         if not opts.audioquality.isdigit():
     if opts.audioquality:
         opts.audioquality = opts.audioquality.strip('k').strip('K')
         if not opts.audioquality.isdigit():

-            parser.error(u'invalid audio quality specified')
+            parser.error('invalid audio quality specified')

     if opts.recodevideo is not None:
     if opts.recodevideo is not None:

-        if opts.recodevideo not in ['mp4', 'flv', 'webm', 'ogg', 'mkv']:
-            parser.error(u'invalid video recode format specified')
+        if opts.recodevideo not in ['mp4', 'flv', 'webm', 'ogg', 'mkv', 'avi']:
+            parser.error('invalid video recode format specified')
+    if opts.convertsubtitles is not None:
+        if opts.convertsubtitles not in ['srt', 'vtt', 'ass']:
+            parser.error('invalid subtitle format specified')
+

     if opts.date is not None:
         date = DateRange.day(opts.date)
     else:
     if opts.date is not None:
         date = DateRange.day(opts.date)
     else:


@@ -183,36 +186,97 @@ def _real_main(argv=None):
 
     # --all-sub automatically sets --write-sub if --write-auto-sub is not given
     # this was the old behaviour if only --all-sub was given.
 
     # --all-sub automatically sets --write-sub if --write-auto-sub is not given
     # this was the old behaviour if only --all-sub was given.

-    if opts.allsubtitles and (opts.writeautomaticsub == False):
+    if opts.allsubtitles and not opts.writeautomaticsub:

         opts.writesubtitles = True
 
         opts.writesubtitles = True
 

-    if sys.version_info < (3,):
-        # In Python 2, sys.argv is a bytestring (also note http://bugs.python.org/issue2128 for Windows systems)
-        if opts.outtmpl is not None:
-            opts.outtmpl = opts.outtmpl.decode(preferredencoding())
-    outtmpl =((opts.outtmpl is not None and opts.outtmpl)
-            or (opts.format == '-1' and opts.usetitle and u'%(title)s-%(id)s-%(format)s.%(ext)s')
-            or (opts.format == '-1' and u'%(id)s-%(format)s.%(ext)s')
-            or (opts.usetitle and opts.autonumber and u'%(autonumber)s-%(title)s-%(id)s.%(ext)s')
-            or (opts.usetitle and u'%(title)s-%(id)s.%(ext)s')
-            or (opts.useid and u'%(id)s.%(ext)s')
-            or (opts.autonumber and u'%(autonumber)s-%(id)s.%(ext)s')
-            or DEFAULT_OUTTMPL)
+    outtmpl = ((opts.outtmpl is not None and opts.outtmpl) or
+               (opts.format == '-1' and opts.usetitle and '%(title)s-%(id)s-%(format)s.%(ext)s') or
+               (opts.format == '-1' and '%(id)s-%(format)s.%(ext)s') or
+               (opts.usetitle and opts.autonumber and '%(autonumber)s-%(title)s-%(id)s.%(ext)s') or
+               (opts.usetitle and '%(title)s-%(id)s.%(ext)s') or
+               (opts.useid and '%(id)s.%(ext)s') or
+               (opts.autonumber and '%(autonumber)s-%(id)s.%(ext)s') or
+               DEFAULT_OUTTMPL)

     if not os.path.splitext(outtmpl)[1] and opts.extractaudio:
     if not os.path.splitext(outtmpl)[1] and opts.extractaudio:

-        parser.error(u'Cannot download a video and extract audio into the same'
-                     u' file! Use "{0}.%(ext)s" instead of "{0}" as the output'
-                     u' template'.format(outtmpl))
+        parser.error('Cannot download a video and extract audio into the same'
+                     ' file! Use "{0}.%(ext)s" instead of "{0}" as the output'
+                     ' template'.format(outtmpl))

 
 

-    any_printing = opts.geturl or opts.gettitle or opts.getid or opts.getthumbnail or opts.getdescription or opts.getfilename or opts.getformat or opts.getduration or opts.dumpjson or opts.dump_single_json
+    any_getting = opts.geturl or opts.gettitle or opts.getid or opts.getthumbnail or opts.getdescription or opts.getfilename or opts.getformat or opts.getduration or opts.dumpjson or opts.dump_single_json
+    any_printing = opts.print_json

     download_archive_fn = compat_expanduser(opts.download_archive) if opts.download_archive is not None else opts.download_archive
 
     download_archive_fn = compat_expanduser(opts.download_archive) if opts.download_archive is not None else opts.download_archive
 

+    # PostProcessors
+    postprocessors = []
+    # Add the metadata pp first, the other pps will copy it
+    if opts.metafromtitle:
+        postprocessors.append({
+            'key': 'MetadataFromTitle',
+            'titleformat': opts.metafromtitle
+        })
+    if opts.addmetadata:
+        postprocessors.append({'key': 'FFmpegMetadata'})
+    if opts.extractaudio:
+        postprocessors.append({
+            'key': 'FFmpegExtractAudio',
+            'preferredcodec': opts.audioformat,
+            'preferredquality': opts.audioquality,
+            'nopostoverwrites': opts.nopostoverwrites,
+        })
+    if opts.recodevideo:
+        postprocessors.append({
+            'key': 'FFmpegVideoConvertor',
+            'preferedformat': opts.recodevideo,
+        })
+    if opts.convertsubtitles:
+        postprocessors.append({
+            'key': 'FFmpegSubtitlesConvertor',
+            'format': opts.convertsubtitles,
+        })
+    if opts.embedsubtitles:
+        postprocessors.append({
+            'key': 'FFmpegEmbedSubtitle',
+        })
+    if opts.xattrs:
+        postprocessors.append({'key': 'XAttrMetadata'})
+    if opts.embedthumbnail:
+        already_have_thumbnail = opts.writethumbnail or opts.write_all_thumbnails
+        postprocessors.append({
+            'key': 'EmbedThumbnail',
+            'already_have_thumbnail': already_have_thumbnail
+        })
+        if not already_have_thumbnail:
+            opts.writethumbnail = True
+    # Please keep ExecAfterDownload towards the bottom as it allows the user to modify the final file in any way.
+    # So if the user is able to remove the file before your postprocessor runs it might cause a few problems.
+    if opts.exec_cmd:
+        postprocessors.append({
+            'key': 'ExecAfterDownload',
+            'exec_cmd': opts.exec_cmd,
+        })
+    if opts.xattr_set_filesize:
+        try:
+            import xattr
+            xattr  # Confuse flake8
+        except ImportError:
+            parser.error('setting filesize xattr requested but python-xattr is not available')
+    external_downloader_args = None
+    if opts.external_downloader_args:
+        external_downloader_args = shlex.split(opts.external_downloader_args)
+    postprocessor_args = None
+    if opts.postprocessor_args:
+        postprocessor_args = shlex.split(opts.postprocessor_args)
+    match_filter = (
+        None if opts.match_filter is None
+        else match_filter_func(opts.match_filter))
+

     ydl_opts = {
         'usenetrc': opts.usenetrc,
         'username': opts.username,
         'password': opts.password,
         'twofactor': opts.twofactor,
         'videopassword': opts.videopassword,
     ydl_opts = {
         'usenetrc': opts.usenetrc,
         'username': opts.username,
         'password': opts.password,
         'twofactor': opts.twofactor,
         'videopassword': opts.videopassword,

-        'quiet': (opts.quiet or any_printing),
+        'quiet': (opts.quiet or any_getting or any_printing),

         'no_warnings': opts.no_warnings,
         'forceurl': opts.geturl,
         'forcetitle': opts.gettitle,
         'no_warnings': opts.no_warnings,
         'forceurl': opts.geturl,
         'forcetitle': opts.gettitle,


@@ -222,20 +286,20 @@ def _real_main(argv=None):
         'forceduration': opts.getduration,
         'forcefilename': opts.getfilename,
         'forceformat': opts.getformat,
         'forceduration': opts.getduration,
         'forcefilename': opts.getfilename,
         'forceformat': opts.getformat,

-        'forcejson': opts.dumpjson,
+        'forcejson': opts.dumpjson or opts.print_json,

         'dump_single_json': opts.dump_single_json,
         'dump_single_json': opts.dump_single_json,

-        'simulate': opts.simulate or any_printing,
+        'simulate': opts.simulate or any_getting,

         'skip_download': opts.skip_download,
         'format': opts.format,
         'skip_download': opts.skip_download,
         'format': opts.format,

-        'format_limit': opts.format_limit,

         'listformats': opts.listformats,
         'outtmpl': outtmpl,
         'autonumber_size': opts.autonumber_size,
         'restrictfilenames': opts.restrictfilenames,
         'ignoreerrors': opts.ignoreerrors,
         'listformats': opts.listformats,
         'outtmpl': outtmpl,
         'autonumber_size': opts.autonumber_size,
         'restrictfilenames': opts.restrictfilenames,
         'ignoreerrors': opts.ignoreerrors,

+        'force_generic_extractor': opts.force_generic_extractor,

         'ratelimit': opts.ratelimit,
         'nooverwrites': opts.nooverwrites,
         'ratelimit': opts.ratelimit,
         'nooverwrites': opts.nooverwrites,

-        'retries': opts.retries,
+        'retries': opts_retries,

         'buffersize': opts.buffersize,
         'noresizebuffer': opts.noresizebuffer,
         'continuedl': opts.continue_dl,
         'buffersize': opts.buffersize,
         'noresizebuffer': opts.noresizebuffer,
         'continuedl': opts.continue_dl,


@@ -243,6 +307,7 @@ def _real_main(argv=None):
         'progress_with_newline': opts.progress_with_newline,
         'playliststart': opts.playliststart,
         'playlistend': opts.playlistend,
         'progress_with_newline': opts.progress_with_newline,
         'playliststart': opts.playliststart,
         'playlistend': opts.playlistend,

+        'playlistreverse': opts.playlist_reverse,

         'noplaylist': opts.noplaylist,
         'logtostderr': opts.outtmpl == '-',
         'consoletitle': opts.consoletitle,
         'noplaylist': opts.noplaylist,
         'logtostderr': opts.outtmpl == '-',
         'consoletitle': opts.consoletitle,


@@ -252,6 +317,7 @@ def _real_main(argv=None):
         'writeannotations': opts.writeannotations,
         'writeinfojson': opts.writeinfojson,
         'writethumbnail': opts.writethumbnail,
         'writeannotations': opts.writeannotations,
         'writeinfojson': opts.writeinfojson,
         'writethumbnail': opts.writethumbnail,

+        'write_all_thumbnails': opts.write_all_thumbnails,

         'writesubtitles': opts.writesubtitles,
         'writeautomaticsub': opts.writeautomaticsub,
         'allsubtitles': opts.allsubtitles,
         'writesubtitles': opts.writesubtitles,
         'writeautomaticsub': opts.writeautomaticsub,
         'allsubtitles': opts.allsubtitles,


@@ -288,35 +354,27 @@ def _real_main(argv=None):
         'default_search': opts.default_search,
         'youtube_include_dash_manifest': opts.youtube_include_dash_manifest,
         'encoding': opts.encoding,
         'default_search': opts.default_search,
         'youtube_include_dash_manifest': opts.youtube_include_dash_manifest,
         'encoding': opts.encoding,

-        'exec_cmd': opts.exec_cmd,

         'extract_flat': opts.extract_flat,
         'extract_flat': opts.extract_flat,

+        'merge_output_format': opts.merge_output_format,
+        'postprocessors': postprocessors,
+        'fixup': opts.fixup,
+        'source_address': opts.source_address,
+        'call_home': opts.call_home,
+        'sleep_interval': opts.sleep_interval,
+        'external_downloader': opts.external_downloader,
+        'list_thumbnails': opts.list_thumbnails,
+        'playlist_items': opts.playlist_items,
+        'xattr_set_filesize': opts.xattr_set_filesize,
+        'match_filter': match_filter,
+        'no_color': opts.no_color,
+        'ffmpeg_location': opts.ffmpeg_location,
+        'hls_prefer_native': opts.hls_prefer_native,
+        'external_downloader_args': external_downloader_args,
+        'postprocessor_args': postprocessor_args,
+        'cn_verification_proxy': opts.cn_verification_proxy,

     }
 
     with YoutubeDL(ydl_opts) as ydl:
     }
 
     with YoutubeDL(ydl_opts) as ydl:

-        # PostProcessors
-        # Add the metadata pp first, the other pps will copy it
-        if opts.addmetadata:
-            ydl.add_post_processor(FFmpegMetadataPP())
-        if opts.extractaudio:
-            ydl.add_post_processor(FFmpegExtractAudioPP(preferredcodec=opts.audioformat, preferredquality=opts.audioquality, nopostoverwrites=opts.nopostoverwrites))
-        if opts.recodevideo:
-            ydl.add_post_processor(FFmpegVideoConvertor(preferedformat=opts.recodevideo))
-        if opts.embedsubtitles:
-            ydl.add_post_processor(FFmpegEmbedSubtitlePP(subtitlesformat=opts.subtitlesformat))
-        if opts.xattrs:
-            ydl.add_post_processor(XAttrMetadataPP())
-        if opts.embedthumbnail:
-            if not opts.addmetadata:
-                ydl.add_post_processor(FFmpegAudioFixPP())
-            ydl.add_post_processor(AtomicParsleyPP())
-
-
-        # Please keep ExecAfterDownload towards the bottom as it allows the user to modify the final file in any way.
-        # So if the user is able to remove the file before your postprocessor runs it might cause a few problems.
-        if opts.exec_cmd:
-            ydl.add_post_processor(ExecAfterDownloadPP(
-                verboseOutput=opts.verbose, exec_cmd=opts.exec_cmd))
-

         # Update version
         if opts.update_self:
             update_self(ydl.to_screen, opts.verbose)
         # Update version
         if opts.update_self:
             update_self(ydl.to_screen, opts.verbose)


@@ -327,18 +385,21 @@ def _real_main(argv=None):
 
         # Maybe do nothing
         if (len(all_urls) < 1) and (opts.load_info_filename is None):
 
         # Maybe do nothing
         if (len(all_urls) < 1) and (opts.load_info_filename is None):

-            if not (opts.update_self or opts.rm_cachedir):
-                parser.error(u'you must provide at least one URL')
-            else:
+            if opts.update_self or opts.rm_cachedir:

                 sys.exit()
 
                 sys.exit()
 

+            ydl.warn_if_short_id(sys.argv[1:] if argv is None else argv)
+            parser.error(
+                'You must provide at least one URL.\n'
+                'Type youtube-dl --help to see a list of all options.')
+

         try:
             if opts.load_info_filename is not None:
                 retcode = ydl.download_with_info_file(opts.load_info_filename)
             else:
                 retcode = ydl.download(all_urls)
         except MaxDownloadsReached:
         try:
             if opts.load_info_filename is not None:
                 retcode = ydl.download_with_info_file(opts.load_info_filename)
             else:
                 retcode = ydl.download(all_urls)
         except MaxDownloadsReached:

-            ydl.to_screen(u'--max-download limit reached, aborting.')
+            ydl.to_screen('--max-download limit reached, aborting.')

             retcode = 101
 
     sys.exit(retcode)
             retcode = 101
 
     sys.exit(retcode)


@@ -350,6 +411,8 @@ def main(argv=None):
     except DownloadError:
         sys.exit(1)
     except SameFileError:
     except DownloadError:
         sys.exit(1)
     except SameFileError:

-        sys.exit(u'ERROR: fixed output name but more than one file to download')
+        sys.exit('ERROR: fixed output name but more than one file to download')

     except KeyboardInterrupt:
     except KeyboardInterrupt:

-        sys.exit(u'\nERROR: Interrupted by user')
+        sys.exit('\nERROR: Interrupted by user')
+
+__all__ = ['main', 'YoutubeDL', 'gen_extractors', 'list_extractors']