Merge branch 'modular-data-extract'

Commits in this branch are prefixed with "Extraction:"
This branch refactors data extraction. All such functionality has been moved to the yt_data_extract module.
Responses from requests are given to the module and it parses them into a consistent, more useful format.
The dependency on youtube-dl has also been dropped and this functionality has been built from scratch for these reasons:
(1) I've noticed youtube-dl breaks more often than invidious (which uses watch page extraction built from scratch) in response to changes from Youtube, so I'm hoping what I wrote will also be less brittle.
(2) Such breakage is inconvenient because I have to manually merge the fixes since I had to make changes to youtube-dl to make it do things such as extracting related videos.
(3) I have no control over error handling and request pooling with youtube-dl, since it does all the requests (these would require intrusive changes I don't want to maintain).
(4) I will now be able to finally display the number of comments and whether comments are disabled without making additional requests.

7 files changed, 0 insertions, 973 deletions

diff --git a/youtube_dl/postprocessor/__init__.py b/youtube_dl/postprocessor/__init__.py
deleted file mode 100644
index 3ea5183..0000000
--- a/youtube_dl/postprocessor/__init__.py
+++ /dev/null
@@ -1,40 +0,0 @@
-from __future__ import unicode_literals
-
-from .embedthumbnail import EmbedThumbnailPP
-from .ffmpeg import (
-    FFmpegPostProcessor,
-    FFmpegEmbedSubtitlePP,
-    FFmpegExtractAudioPP,
-    FFmpegFixupStretchedPP,
-    FFmpegFixupM3u8PP,
-    FFmpegFixupM4aPP,
-    FFmpegMergerPP,
-    FFmpegMetadataPP,
-    FFmpegVideoConvertorPP,
-    FFmpegSubtitlesConvertorPP,
-)
-from .xattrpp import XAttrMetadataPP
-from .execafterdownload import ExecAfterDownloadPP
-from .metadatafromtitle import MetadataFromTitlePP
-
-
-def get_postprocessor(key):
-    return globals()[key + 'PP']
-
-
-__all__ = [
-    'EmbedThumbnailPP',
-    'ExecAfterDownloadPP',
-    'FFmpegEmbedSubtitlePP',
-    'FFmpegExtractAudioPP',
-    'FFmpegFixupM3u8PP',
-    'FFmpegFixupM4aPP',
-    'FFmpegFixupStretchedPP',
-    'FFmpegMergerPP',
-    'FFmpegMetadataPP',
-    'FFmpegPostProcessor',
-    'FFmpegSubtitlesConvertorPP',
-    'FFmpegVideoConvertorPP',
-    'MetadataFromTitlePP',
-    'XAttrMetadataPP',
-]
diff --git a/youtube_dl/postprocessor/common.py b/youtube_dl/postprocessor/common.py
deleted file mode 100644
index 599dd1d..0000000
--- a/youtube_dl/postprocessor/common.py
+++ /dev/null
@@ -1,69 +0,0 @@
-from __future__ import unicode_literals
-
-import os
-
-from ..utils import (
-    PostProcessingError,
-    cli_configuration_args,
-    encodeFilename,
-)
-
-
-class PostProcessor(object):
-    """Post Processor class.
-
-    PostProcessor objects can be added to downloaders with their
-    add_post_processor() method. When the downloader has finished a
-    successful download, it will take its internal chain of PostProcessors
-    and start calling the run() method on each one of them, first with
-    an initial argument and then with the returned value of the previous
-    PostProcessor.
-
-    The chain will be stopped if one of them ever returns None or the end
-    of the chain is reached.
-
-    PostProcessor objects follow a "mutual registration" process similar
-    to InfoExtractor objects.
-
-    Optionally PostProcessor can use a list of additional command-line arguments
-    with self._configuration_args.
-    """
-
-    _downloader = None
-
-    def __init__(self, downloader=None):
-        self._downloader = downloader
-
-    def set_downloader(self, downloader):
-        """Sets the downloader for this PP."""
-        self._downloader = downloader
-
-    def run(self, information):
-        """Run the PostProcessor.
-
-        The "information" argument is a dictionary like the ones
-        composed by InfoExtractors. The only difference is that this
-        one has an extra field called "filepath" that points to the
-        downloaded file.
-
-        This method returns a tuple, the first element is a list of the files
-        that can be deleted, and the second of which is the updated
-        information.
-
-        In addition, this method may raise a PostProcessingError
-        exception if post processing fails.
-        """
-        return [], information  # by default, keep file and do nothing
-
-    def try_utime(self, path, atime, mtime, errnote='Cannot update utime of file'):
-        try:
-            os.utime(encodeFilename(path), (atime, mtime))
-        except Exception:
-            self._downloader.report_warning(errnote)
-
-    def _configuration_args(self, default=[]):
-        return cli_configuration_args(self._downloader.params, 'postprocessor_args', default)
-
-
-class AudioConversionError(PostProcessingError):
-    pass
diff --git a/youtube_dl/postprocessor/embedthumbnail.py b/youtube_dl/postprocessor/embedthumbnail.py
deleted file mode 100644
index 56be914..0000000
--- a/youtube_dl/postprocessor/embedthumbnail.py
+++ /dev/null
@@ -1,93 +0,0 @@
-# coding: utf-8
-from __future__ import unicode_literals
-
-
-import os
-import subprocess
-
-from .ffmpeg import FFmpegPostProcessor
-
-from ..utils import (
-    check_executable,
-    encodeArgument,
-    encodeFilename,
-    PostProcessingError,
-    prepend_extension,
-    shell_quote
-)
-
-
-class EmbedThumbnailPPError(PostProcessingError):
-    pass
-
-
-class EmbedThumbnailPP(FFmpegPostProcessor):
-    def __init__(self, downloader=None, already_have_thumbnail=False):
-        super(EmbedThumbnailPP, self).__init__(downloader)
-        self._already_have_thumbnail = already_have_thumbnail
-
-    def run(self, info):
-        filename = info['filepath']
-        temp_filename = prepend_extension(filename, 'temp')
-
-        if not info.get('thumbnails'):
-            self._downloader.to_screen('[embedthumbnail] There aren\'t any thumbnails to embed')
-            return [], info
-
-        thumbnail_filename = info['thumbnails'][-1]['filename']
-
-        if not os.path.exists(encodeFilename(thumbnail_filename)):
-            self._downloader.report_warning(
-                'Skipping embedding the thumbnail because the file is missing.')
-            return [], info
-
-        if info['ext'] == 'mp3':
-            options = [
-                '-c', 'copy', '-map', '0', '-map', '1',
-                '-metadata:s:v', 'title="Album cover"', '-metadata:s:v', 'comment="Cover (Front)"']
-
-            self._downloader.to_screen('[ffmpeg] Adding thumbnail to "%s"' % filename)
-
-            self.run_ffmpeg_multiple_files([filename, thumbnail_filename], temp_filename, options)
-
-            if not self._already_have_thumbnail:
-                os.remove(encodeFilename(thumbnail_filename))
-            os.remove(encodeFilename(filename))
-            os.rename(encodeFilename(temp_filename), encodeFilename(filename))
-
-        elif info['ext'] in ['m4a', 'mp4']:
-            if not check_executable('AtomicParsley', ['-v']):
-                raise EmbedThumbnailPPError('AtomicParsley was not found. Please install.')
-
-            cmd = [encodeFilename('AtomicParsley', True),
-                   encodeFilename(filename, True),
-                   encodeArgument('--artwork'),
-                   encodeFilename(thumbnail_filename, True),
-                   encodeArgument('-o'),
-                   encodeFilename(temp_filename, True)]
-
-            self._downloader.to_screen('[atomicparsley] Adding thumbnail to "%s"' % filename)
-
-            if self._downloader.params.get('verbose', False):
-                self._downloader.to_screen('[debug] AtomicParsley command line: %s' % shell_quote(cmd))
-
-            p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
-            stdout, stderr = p.communicate()
-
-            if p.returncode != 0:
-                msg = stderr.decode('utf-8', 'replace').strip()
-                raise EmbedThumbnailPPError(msg)
-
-            if not self._already_have_thumbnail:
-                os.remove(encodeFilename(thumbnail_filename))
-            # for formats that don't support thumbnails (like 3gp) AtomicParsley
-            # won't create to the temporary file
-            if b'No changes' in stdout:
-                self._downloader.report_warning('The file format doesn\'t support embedding a thumbnail')
-            else:
-                os.remove(encodeFilename(filename))
-                os.rename(encodeFilename(temp_filename), encodeFilename(filename))
-        else:
-            raise EmbedThumbnailPPError('Only mp3 and m4a/mp4 are supported for thumbnail embedding for now.')
-
-        return [], info
diff --git a/youtube_dl/postprocessor/execafterdownload.py b/youtube_dl/postprocessor/execafterdownload.py
deleted file mode 100644
index 64dabe7..0000000
--- a/youtube_dl/postprocessor/execafterdownload.py
+++ /dev/null
@@ -1,31 +0,0 @@
-from __future__ import unicode_literals
-
-import subprocess
-
-from .common import PostProcessor
-from ..compat import compat_shlex_quote
-from ..utils import (
-    encodeArgument,
-    PostProcessingError,
-)
-
-
-class ExecAfterDownloadPP(PostProcessor):
-    def __init__(self, downloader, exec_cmd):
-        super(ExecAfterDownloadPP, self).__init__(downloader)
-        self.exec_cmd = exec_cmd
-
-    def run(self, information):
-        cmd = self.exec_cmd
-        if '{}' not in cmd:
-            cmd += ' {}'
-
-        cmd = cmd.replace('{}', compat_shlex_quote(information['filepath']))
-
-        self._downloader.to_screen('[exec] Executing command: %s' % cmd)
-        retCode = subprocess.call(encodeArgument(cmd), shell=True)
-        if retCode != 0:
-            raise PostProcessingError(
-                'Command returned error code %d' % retCode)
-
-        return [], information
diff --git a/youtube_dl/postprocessor/ffmpeg.py b/youtube_dl/postprocessor/ffmpeg.py
deleted file mode 100644
index 757b496..0000000
--- a/youtube_dl/postprocessor/ffmpeg.py
+++ /dev/null
@@ -1,613 +0,0 @@
-from __future__ import unicode_literals
-
-import io
-import os
-import subprocess
-import time
-import re
-
-
-from .common import AudioConversionError, PostProcessor
-
-from ..compat import (
-    compat_subprocess_get_DEVNULL,
-)
-from ..utils import (
-    encodeArgument,
-    encodeFilename,
-    get_exe_version,
-    is_outdated_version,
-    PostProcessingError,
-    prepend_extension,
-    shell_quote,
-    subtitles_filename,
-    dfxp2srt,
-    ISO639Utils,
-    replace_extension,
-)
-
-
-EXT_TO_OUT_FORMATS = {
-    'aac': 'adts',
-    'flac': 'flac',
-    'm4a': 'ipod',
-    'mka': 'matroska',
-    'mkv': 'matroska',
-    'mpg': 'mpeg',
-    'ogv': 'ogg',
-    'ts': 'mpegts',
-    'wma': 'asf',
-    'wmv': 'asf',
-}
-ACODECS = {
-    'mp3': 'libmp3lame',
-    'aac': 'aac',
-    'flac': 'flac',
-    'm4a': 'aac',
-    'opus': 'libopus',
-    'vorbis': 'libvorbis',
-    'wav': None,
-}
-
-
-class FFmpegPostProcessorError(PostProcessingError):
-    pass
-
-
-class FFmpegPostProcessor(PostProcessor):
-    def __init__(self, downloader=None):
-        PostProcessor.__init__(self, downloader)
-        self._determine_executables()
-
-    def check_version(self):
-        if not self.available:
-            raise FFmpegPostProcessorError('ffmpeg or avconv not found. Please install one.')
-
-        required_version = '10-0' if self.basename == 'avconv' else '1.0'
-        if is_outdated_version(
-                self._versions[self.basename], required_version):
-            warning = 'Your copy of %s is outdated, update %s to version %s or newer if you encounter any errors.' % (
-                self.basename, self.basename, required_version)
-            if self._downloader:
-                self._downloader.report_warning(warning)
-
-    @staticmethod
-    def get_versions(downloader=None):
-        return FFmpegPostProcessor(downloader)._versions
-
-    def _determine_executables(self):
-        programs = ['avprobe', 'avconv', 'ffmpeg', 'ffprobe']
-        prefer_ffmpeg = True
-
-        self.basename = None
-        self.probe_basename = None
-
-        self._paths = None
-        self._versions = None
-        if self._downloader:
-            prefer_ffmpeg = self._downloader.params.get('prefer_ffmpeg', True)
-            location = self._downloader.params.get('ffmpeg_location')
-            if location is not None:
-                if not os.path.exists(location):
-                    self._downloader.report_warning(
-                        'ffmpeg-location %s does not exist! '
-                        'Continuing without avconv/ffmpeg.' % (location))
-                    self._versions = {}
-                    return
-                elif not os.path.isdir(location):
-                    basename = os.path.splitext(os.path.basename(location))[0]
-                    if basename not in programs:
-                        self._downloader.report_warning(
-                            'Cannot identify executable %s, its basename should be one of %s. '
-                            'Continuing without avconv/ffmpeg.' %
-                            (location, ', '.join(programs)))
-                        self._versions = {}
-                        return None
-                    location = os.path.dirname(os.path.abspath(location))
-                    if basename in ('ffmpeg', 'ffprobe'):
-                        prefer_ffmpeg = True
-
-                self._paths = dict(
-                    (p, os.path.join(location, p)) for p in programs)
-                self._versions = dict(
-                    (p, get_exe_version(self._paths[p], args=['-version']))
-                    for p in programs)
-        if self._versions is None:
-            self._versions = dict(
-                (p, get_exe_version(p, args=['-version'])) for p in programs)
-            self._paths = dict((p, p) for p in programs)
-
-        if prefer_ffmpeg is False:
-            prefs = ('avconv', 'ffmpeg')
-        else:
-            prefs = ('ffmpeg', 'avconv')
-        for p in prefs:
-            if self._versions[p]:
-                self.basename = p
-                break
-
-        if prefer_ffmpeg is False:
-            prefs = ('avprobe', 'ffprobe')
-        else:
-            prefs = ('ffprobe', 'avprobe')
-        for p in prefs:
-            if self._versions[p]:
-                self.probe_basename = p
-                break
-
-    @property
-    def available(self):
-        return self.basename is not None
-
-    @property
-    def executable(self):
-        return self._paths[self.basename]
-
-    @property
-    def probe_available(self):
-        return self.probe_basename is not None
-
-    @property
-    def probe_executable(self):
-        return self._paths[self.probe_basename]
-
-    def get_audio_codec(self, path):
-        if not self.probe_available:
-            raise PostProcessingError('ffprobe or avprobe not found. Please install one.')
-        try:
-            cmd = [
-                encodeFilename(self.probe_executable, True),
-                encodeArgument('-show_streams'),
-                encodeFilename(self._ffmpeg_filename_argument(path), True)]
-            if self._downloader.params.get('verbose', False):
-                self._downloader.to_screen('[debug] %s command line: %s' % (self.basename, shell_quote(cmd)))
-            handle = subprocess.Popen(cmd, stderr=compat_subprocess_get_DEVNULL(), stdout=subprocess.PIPE, stdin=subprocess.PIPE)
-            output = handle.communicate()[0]
-            if handle.wait() != 0:
-                return None
-        except (IOError, OSError):
-            return None
-        audio_codec = None
-        for line in output.decode('ascii', 'ignore').split('\n'):
-            if line.startswith('codec_name='):
-                audio_codec = line.split('=')[1].strip()
-            elif line.strip() == 'codec_type=audio' and audio_codec is not None:
-                return audio_codec
-        return None
-
-    def run_ffmpeg_multiple_files(self, input_paths, out_path, opts):
-        self.check_version()
-
-        oldest_mtime = min(
-            os.stat(encodeFilename(path)).st_mtime for path in input_paths)
-
-        opts += self._configuration_args()
-
-        files_cmd = []
-        for path in input_paths:
-            files_cmd.extend([
-                encodeArgument('-i'),
-                encodeFilename(self._ffmpeg_filename_argument(path), True)
-            ])
-        cmd = ([encodeFilename(self.executable, True), encodeArgument('-y')] +
-               files_cmd +
-               [encodeArgument(o) for o in opts] +
-               [encodeFilename(self._ffmpeg_filename_argument(out_path), True)])
-
-        if self._downloader.params.get('verbose', False):
-            self._downloader.to_screen('[debug] ffmpeg command line: %s' % shell_quote(cmd))
-        p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
-        stdout, stderr = p.communicate()
-        if p.returncode != 0:
-            stderr = stderr.decode('utf-8', 'replace')
-            msg = stderr.strip().split('\n')[-1]
-            raise FFmpegPostProcessorError(msg)
-        self.try_utime(out_path, oldest_mtime, oldest_mtime)
-
-    def run_ffmpeg(self, path, out_path, opts):
-        self.run_ffmpeg_multiple_files([path], out_path, opts)
-
-    def _ffmpeg_filename_argument(self, fn):
-        # Always use 'file:' because the filename may contain ':' (ffmpeg
-        # interprets that as a protocol) or can start with '-' (-- is broken in
-        # ffmpeg, see https://ffmpeg.org/trac/ffmpeg/ticket/2127 for details)
-        # Also leave '-' intact in order not to break streaming to stdout.
-        return 'file:' + fn if fn != '-' else fn
-
-
-class FFmpegExtractAudioPP(FFmpegPostProcessor):
-    def __init__(self, downloader=None, preferredcodec=None, preferredquality=None, nopostoverwrites=False):
-        FFmpegPostProcessor.__init__(self, downloader)
-        if preferredcodec is None:
-            preferredcodec = 'best'
-        self._preferredcodec = preferredcodec
-        self._preferredquality = preferredquality
-        self._nopostoverwrites = nopostoverwrites
-
-    def run_ffmpeg(self, path, out_path, codec, more_opts):
-        if codec is None:
-            acodec_opts = []
-        else:
-            acodec_opts = ['-acodec', codec]
-        opts = ['-vn'] + acodec_opts + more_opts
-        try:
-            FFmpegPostProcessor.run_ffmpeg(self, path, out_path, opts)
-        except FFmpegPostProcessorError as err:
-            raise AudioConversionError(err.msg)
-
-    def run(self, information):
-        path = information['filepath']
-
-        filecodec = self.get_audio_codec(path)
-        if filecodec is None:
-            raise PostProcessingError('WARNING: unable to obtain file audio codec with ffprobe')
-
-        more_opts = []
-        if self._preferredcodec == 'best' or self._preferredcodec == filecodec or (self._preferredcodec == 'm4a' and filecodec == 'aac'):
-            if filecodec == 'aac' and self._preferredcodec in ['m4a', 'best']:
-                # Lossless, but in another container
-                acodec = 'copy'
-                extension = 'm4a'
-                more_opts = ['-bsf:a', 'aac_adtstoasc']
-            elif filecodec in ['aac', 'flac', 'mp3', 'vorbis', 'opus']:
-                # Lossless if possible
-                acodec = 'copy'
-                extension = filecodec
-                if filecodec == 'aac':
-                    more_opts = ['-f', 'adts']
-                if filecodec == 'vorbis':
-                    extension = 'ogg'
-            else:
-                # MP3 otherwise.
-                acodec = 'libmp3lame'
-                extension = 'mp3'
-                more_opts = []
-                if self._preferredquality is not None:
-                    if int(self._preferredquality) < 10:
-                        more_opts += ['-q:a', self._preferredquality]
-                    else:
-                        more_opts += ['-b:a', self._preferredquality + 'k']
-        else:
-            # We convert the audio (lossy if codec is lossy)
-            acodec = ACODECS[self._preferredcodec]
-            extension = self._preferredcodec
-            more_opts = []
-            if self._preferredquality is not None:
-                # The opus codec doesn't support the -aq option
-                if int(self._preferredquality) < 10 and extension != 'opus':
-                    more_opts += ['-q:a', self._preferredquality]
-                else:
-                    more_opts += ['-b:a', self._preferredquality + 'k']
-            if self._preferredcodec == 'aac':
-                more_opts += ['-f', 'adts']
-            if self._preferredcodec == 'm4a':
-                more_opts += ['-bsf:a', 'aac_adtstoasc']
-            if self._preferredcodec == 'vorbis':
-                extension = 'ogg'
-            if self._preferredcodec == 'wav':
-                extension = 'wav'
-                more_opts += ['-f', 'wav']
-
-        prefix, sep, ext = path.rpartition('.')  # not os.path.splitext, since the latter does not work on unicode in all setups
-        new_path = prefix + sep + extension
-
-        information['filepath'] = new_path
-        information['ext'] = extension
-
-        # If we download foo.mp3 and convert it to... foo.mp3, then don't delete foo.mp3, silly.
-        if (new_path == path or
-                (self._nopostoverwrites and os.path.exists(encodeFilename(new_path)))):
-            self._downloader.to_screen('[ffmpeg] Post-process file %s exists, skipping' % new_path)
-            return [], information
-
-        try:
-            self._downloader.to_screen('[ffmpeg] Destination: ' + new_path)
-            self.run_ffmpeg(path, new_path, acodec, more_opts)
-        except AudioConversionError as e:
-            raise PostProcessingError(
-                'audio conversion failed: ' + e.msg)
-        except Exception:
-            raise PostProcessingError('error running ' + self.basename)
-
-        # Try to update the date time for extracted audio file.
-        if information.get('filetime') is not None:
-            self.try_utime(
-                new_path, time.time(), information['filetime'],
-                errnote='Cannot update utime of audio file')
-
-        return [path], information
-
-
-class FFmpegVideoConvertorPP(FFmpegPostProcessor):
-    def __init__(self, downloader=None, preferedformat=None):
-        super(FFmpegVideoConvertorPP, self).__init__(downloader)
-        self._preferedformat = preferedformat
-
-    def run(self, information):
-        path = information['filepath']
-        if information['ext'] == self._preferedformat:
-            self._downloader.to_screen('[ffmpeg] Not converting video file %s - already is in target format %s' % (path, self._preferedformat))
-            return [], information
-        options = []
-        if self._preferedformat == 'avi':
-            options.extend(['-c:v', 'libxvid', '-vtag', 'XVID'])
-        prefix, sep, ext = path.rpartition('.')
-        outpath = prefix + sep + self._preferedformat
-        self._downloader.to_screen('[' + 'ffmpeg' + '] Converting video from %s to %s, Destination: ' % (information['ext'], self._preferedformat) + outpath)
-        self.run_ffmpeg(path, outpath, options)
-        information['filepath'] = outpath
-        information['format'] = self._preferedformat
-        information['ext'] = self._preferedformat
-        return [path], information
-
-
-class FFmpegEmbedSubtitlePP(FFmpegPostProcessor):
-    def run(self, information):
-        if information['ext'] not in ('mp4', 'webm', 'mkv'):
-            self._downloader.to_screen('[ffmpeg] Subtitles can only be embedded in mp4, webm or mkv files')
-            return [], information
-        subtitles = information.get('requested_subtitles')
-        if not subtitles:
-            self._downloader.to_screen('[ffmpeg] There aren\'t any subtitles to embed')
-            return [], information
-
-        filename = information['filepath']
-
-        ext = information['ext']
-        sub_langs = []
-        sub_filenames = []
-        webm_vtt_warn = False
-
-        for lang, sub_info in subtitles.items():
-            sub_ext = sub_info['ext']
-            if ext != 'webm' or ext == 'webm' and sub_ext == 'vtt':
-                sub_langs.append(lang)
-                sub_filenames.append(subtitles_filename(filename, lang, sub_ext))
-            else:
-                if not webm_vtt_warn and ext == 'webm' and sub_ext != 'vtt':
-                    webm_vtt_warn = True
-                    self._downloader.to_screen('[ffmpeg] Only WebVTT subtitles can be embedded in webm files')
-
-        if not sub_langs:
-            return [], information
-
-        input_files = [filename] + sub_filenames
-
-        opts = [
-            '-map', '0',
-            '-c', 'copy',
-            # Don't copy the existing subtitles, we may be running the
-            # postprocessor a second time
-            '-map', '-0:s',
-        ]
-        if information['ext'] == 'mp4':
-            opts += ['-c:s', 'mov_text']
-        for (i, lang) in enumerate(sub_langs):
-            opts.extend(['-map', '%d:0' % (i + 1)])
-            lang_code = ISO639Utils.short2long(lang)
-            if lang_code is not None:
-                opts.extend(['-metadata:s:s:%d' % i, 'language=%s' % lang_code])
-
-        temp_filename = prepend_extension(filename, 'temp')
-        self._downloader.to_screen('[ffmpeg] Embedding subtitles in \'%s\'' % filename)
-        self.run_ffmpeg_multiple_files(input_files, temp_filename, opts)
-        os.remove(encodeFilename(filename))
-        os.rename(encodeFilename(temp_filename), encodeFilename(filename))
-
-        return sub_filenames, information
-
-
-class FFmpegMetadataPP(FFmpegPostProcessor):
-    def run(self, info):
-        metadata = {}
-
-        def add(meta_list, info_list=None):
-            if not info_list:
-                info_list = meta_list
-            if not isinstance(meta_list, (list, tuple)):
-                meta_list = (meta_list,)
-            if not isinstance(info_list, (list, tuple)):
-                info_list = (info_list,)
-            for info_f in info_list:
-                if info.get(info_f) is not None:
-                    for meta_f in meta_list:
-                        metadata[meta_f] = info[info_f]
-                    break
-
-        add('title', ('track', 'title'))
-        add('date', 'upload_date')
-        add(('description', 'comment'), 'description')
-        add('purl', 'webpage_url')
-        add('track', 'track_number')
-        add('artist', ('artist', 'creator', 'uploader', 'uploader_id'))
-        add('genre')
-        add('album')
-        add('album_artist')
-        add('disc', 'disc_number')
-
-        if not metadata:
-            self._downloader.to_screen('[ffmpeg] There isn\'t any metadata to add')
-            return [], info
-
-        filename = info['filepath']
-        temp_filename = prepend_extension(filename, 'temp')
-        in_filenames = [filename]
-        options = []
-
-        if info['ext'] == 'm4a':
-            options.extend(['-vn', '-acodec', 'copy'])
-        else:
-            options.extend(['-c', 'copy'])
-
-        for (name, value) in metadata.items():
-            options.extend(['-metadata', '%s=%s' % (name, value)])
-
-        chapters = info.get('chapters', [])
-        if chapters:
-            metadata_filename = replace_extension(filename, 'meta')
-            with io.open(metadata_filename, 'wt', encoding='utf-8') as f:
-                def ffmpeg_escape(text):
-                    return re.sub(r'(=|;|#|\\|\n)', r'\\\1', text)
-
-                metadata_file_content = ';FFMETADATA1\n'
-                for chapter in chapters:
-                    metadata_file_content += '[CHAPTER]\nTIMEBASE=1/1000\n'
-                    metadata_file_content += 'START=%d\n' % (chapter['start_time'] * 1000)
-                    metadata_file_content += 'END=%d\n' % (chapter['end_time'] * 1000)
-                    chapter_title = chapter.get('title')
-                    if chapter_title:
-                        metadata_file_content += 'title=%s\n' % ffmpeg_escape(chapter_title)
-                f.write(metadata_file_content)
-                in_filenames.append(metadata_filename)
-                options.extend(['-map_metadata', '1'])
-
-        self._downloader.to_screen('[ffmpeg] Adding metadata to \'%s\'' % filename)
-        self.run_ffmpeg_multiple_files(in_filenames, temp_filename, options)
-        if chapters:
-            os.remove(metadata_filename)
-        os.remove(encodeFilename(filename))
-        os.rename(encodeFilename(temp_filename), encodeFilename(filename))
-        return [], info
-
-
-class FFmpegMergerPP(FFmpegPostProcessor):
-    def run(self, info):
-        filename = info['filepath']
-        temp_filename = prepend_extension(filename, 'temp')
-        args = ['-c', 'copy', '-map', '0:v:0', '-map', '1:a:0']
-        self._downloader.to_screen('[ffmpeg] Merging formats into "%s"' % filename)
-        self.run_ffmpeg_multiple_files(info['__files_to_merge'], temp_filename, args)
-        os.rename(encodeFilename(temp_filename), encodeFilename(filename))
-        return info['__files_to_merge'], info
-
-    def can_merge(self):
-        # TODO: figure out merge-capable ffmpeg version
-        if self.basename != 'avconv':
-            return True
-
-        required_version = '10-0'
-        if is_outdated_version(
-                self._versions[self.basename], required_version):
-            warning = ('Your copy of %s is outdated and unable to properly mux separate video and audio files, '
-                       'youtube-dl will download single file media. '
-                       'Update %s to version %s or newer to fix this.') % (
-                           self.basename, self.basename, required_version)
-            if self._downloader:
-                self._downloader.report_warning(warning)
-            return False
-        return True
-
-
-class FFmpegFixupStretchedPP(FFmpegPostProcessor):
-    def run(self, info):
-        stretched_ratio = info.get('stretched_ratio')
-        if stretched_ratio is None or stretched_ratio == 1:
-            return [], info
-
-        filename = info['filepath']
-        temp_filename = prepend_extension(filename, 'temp')
-
-        options = ['-c', 'copy', '-aspect', '%f' % stretched_ratio]
-        self._downloader.to_screen('[ffmpeg] Fixing aspect ratio in "%s"' % filename)
-        self.run_ffmpeg(filename, temp_filename, options)
-
-        os.remove(encodeFilename(filename))
-        os.rename(encodeFilename(temp_filename), encodeFilename(filename))
-
-        return [], info
-
-
-class FFmpegFixupM4aPP(FFmpegPostProcessor):
-    def run(self, info):
-        if info.get('container') != 'm4a_dash':
-            return [], info
-
-        filename = info['filepath']
-        temp_filename = prepend_extension(filename, 'temp')
-
-        options = ['-c', 'copy', '-f', 'mp4']
-        self._downloader.to_screen('[ffmpeg] Correcting container in "%s"' % filename)
-        self.run_ffmpeg(filename, temp_filename, options)
-
-        os.remove(encodeFilename(filename))
-        os.rename(encodeFilename(temp_filename), encodeFilename(filename))
-
-        return [], info
-
-
-class FFmpegFixupM3u8PP(FFmpegPostProcessor):
-    def run(self, info):
-        filename = info['filepath']
-        if self.get_audio_codec(filename) == 'aac':
-            temp_filename = prepend_extension(filename, 'temp')
-
-            options = ['-c', 'copy', '-f', 'mp4', '-bsf:a', 'aac_adtstoasc']
-            self._downloader.to_screen('[ffmpeg] Fixing malformed AAC bitstream in "%s"' % filename)
-            self.run_ffmpeg(filename, temp_filename, options)
-
-            os.remove(encodeFilename(filename))
-            os.rename(encodeFilename(temp_filename), encodeFilename(filename))
-        return [], info
-
-
-class FFmpegSubtitlesConvertorPP(FFmpegPostProcessor):
-    def __init__(self, downloader=None, format=None):
-        super(FFmpegSubtitlesConvertorPP, self).__init__(downloader)
-        self.format = format
-
-    def run(self, info):
-        subs = info.get('requested_subtitles')
-        filename = info['filepath']
-        new_ext = self.format
-        new_format = new_ext
-        if new_format == 'vtt':
-            new_format = 'webvtt'
-        if subs is None:
-            self._downloader.to_screen('[ffmpeg] There aren\'t any subtitles to convert')
-            return [], info
-        self._downloader.to_screen('[ffmpeg] Converting subtitles')
-        sub_filenames = []
-        for lang, sub in subs.items():
-            ext = sub['ext']
-            if ext == new_ext:
-                self._downloader.to_screen(
-                    '[ffmpeg] Subtitle file for %s is already in the requested format' % new_ext)
-                continue
-            old_file = subtitles_filename(filename, lang, ext)
-            sub_filenames.append(old_file)
-            new_file = subtitles_filename(filename, lang, new_ext)
-
-            if ext in ('dfxp', 'ttml', 'tt'):
-                self._downloader.report_warning(
-                    'You have requested to convert dfxp (TTML) subtitles into another format, '
-                    'which results in style information loss')
-
-                dfxp_file = old_file
-                srt_file = subtitles_filename(filename, lang, 'srt')
-
-                with open(dfxp_file, 'rb') as f:
-                    srt_data = dfxp2srt(f.read())
-
-                with io.open(srt_file, 'wt', encoding='utf-8') as f:
-                    f.write(srt_data)
-                old_file = srt_file
-
-                subs[lang] = {
-                    'ext': 'srt',
-                    'data': srt_data
-                }
-
-                if new_ext == 'srt':
-                    continue
-                else:
-                    sub_filenames.append(srt_file)
-
-            self.run_ffmpeg(old_file, new_file, ['-f', new_format])
-
-            with io.open(new_file, 'rt', encoding='utf-8') as f:
-                subs[lang] = {
-                    'ext': new_ext,
-                    'data': f.read(),
-                }
-
-        return sub_filenames, info
diff --git a/youtube_dl/postprocessor/metadatafromtitle.py b/youtube_dl/postprocessor/metadatafromtitle.py
deleted file mode 100644
index f5c14d9..0000000
--- a/youtube_dl/postprocessor/metadatafromtitle.py
+++ /dev/null
@@ -1,48 +0,0 @@
-from __future__ import unicode_literals
-
-import re
-
-from .common import PostProcessor
-
-
-class MetadataFromTitlePP(PostProcessor):
-    def __init__(self, downloader, titleformat):
-        super(MetadataFromTitlePP, self).__init__(downloader)
-        self._titleformat = titleformat
-        self._titleregex = (self.format_to_regex(titleformat)
-                            if re.search(r'%\(\w+\)s', titleformat)
-                            else titleformat)
-
-    def format_to_regex(self, fmt):
-        r"""
-        Converts a string like
-           '%(title)s - %(artist)s'
-        to a regex like
-           '(?P<title>.+)\ \-\ (?P<artist>.+)'
-        """
-        lastpos = 0
-        regex = ''
-        # replace %(..)s with regex group and escape other string parts
-        for match in re.finditer(r'%\((\w+)\)s', fmt):
-            regex += re.escape(fmt[lastpos:match.start()])
-            regex += r'(?P<' + match.group(1) + '>.+)'
-            lastpos = match.end()
-        if lastpos < len(fmt):
-            regex += re.escape(fmt[lastpos:])
-        return regex
-
-    def run(self, info):
-        title = info['title']
-        match = re.match(self._titleregex, title)
-        if match is None:
-            self._downloader.to_screen(
-                '[fromtitle] Could not interpret title of video as "%s"'
-                % self._titleformat)
-            return [], info
-        for attribute, value in match.groupdict().items():
-            info[attribute] = value
-            self._downloader.to_screen(
-                '[fromtitle] parsed %s: %s'
-                % (attribute, value if value is not None else 'NA'))
-
-        return [], info
diff --git a/youtube_dl/postprocessor/xattrpp.py b/youtube_dl/postprocessor/xattrpp.py
deleted file mode 100644
index b0aed9c..0000000
--- a/youtube_dl/postprocessor/xattrpp.py
+++ /dev/null
@@ -1,79 +0,0 @@
-from __future__ import unicode_literals
-
-from .common import PostProcessor
-from ..compat import compat_os_name
-from ..utils import (
-    hyphenate_date,
-    write_xattr,
-    XAttrMetadataError,
-    XAttrUnavailableError,
-)
-
-
-class XAttrMetadataPP(PostProcessor):
-
-    #
-    # More info about extended attributes for media:
-    #   http://freedesktop.org/wiki/CommonExtendedAttributes/
-    #   http://www.freedesktop.org/wiki/PhreedomDraft/
-    #   http://dublincore.org/documents/usageguide/elements.shtml
-    #
-    # TODO:
-    #  * capture youtube keywords and put them in 'user.dublincore.subject' (comma-separated)
-    #  * figure out which xattrs can be used for 'duration', 'thumbnail', 'resolution'
-    #
-
-    def run(self, info):
-        """ Set extended attributes on downloaded file (if xattr support is found). """
-
-        # Write the metadata to the file's xattrs
-        self._downloader.to_screen('[metadata] Writing metadata to file\'s xattrs')
-
-        filename = info['filepath']
-
-        try:
-            xattr_mapping = {
-                'user.xdg.referrer.url': 'webpage_url',
-                # 'user.xdg.comment':            'description',
-                'user.dublincore.title': 'title',
-                'user.dublincore.date': 'upload_date',
-                'user.dublincore.description': 'description',
-                'user.dublincore.contributor': 'uploader',
-                'user.dublincore.format': 'format',
-            }
-
-            num_written = 0
-            for xattrname, infoname in xattr_mapping.items():
-
-                value = info.get(infoname)
-
-                if value:
-                    if infoname == 'upload_date':
-                        value = hyphenate_date(value)
-
-                    byte_value = value.encode('utf-8')
-                    write_xattr(filename, xattrname, byte_value)
-                    num_written += 1
-
-            return [], info
-
-        except XAttrUnavailableError as e:
-            self._downloader.report_error(str(e))
-            return [], info
-
-        except XAttrMetadataError as e:
-            if e.reason == 'NO_SPACE':
-                self._downloader.report_warning(
-                    'There\'s no disk space left, disk quota exceeded or filesystem xattr limit exceeded. ' +
-                    (('Some ' if num_written else '') + 'extended attributes are not written.').capitalize())
-            elif e.reason == 'VALUE_TOO_LONG':
-                self._downloader.report_warning(
-                    'Unable to write extended attributes due to too long values.')
-            else:
-                msg = 'This filesystem doesn\'t support extended attributes. '
-                if compat_os_name == 'nt':
-                    msg += 'You need to use NTFS.'
-                else:
-                    msg += '(You may have to enable them in your /etc/fstab)'
-                self._downloader.report_error(msg)
-            return [], info