diff options
Diffstat (limited to 'yt_dlp/downloader/external.py')
| -rw-r--r-- | yt_dlp/downloader/external.py | 664 |
1 files changed, 664 insertions, 0 deletions
diff --git a/yt_dlp/downloader/external.py b/yt_dlp/downloader/external.py new file mode 100644 index 0000000..ce5eeb0 --- /dev/null +++ b/yt_dlp/downloader/external.py @@ -0,0 +1,664 @@ +import enum +import json +import os +import re +import subprocess +import sys +import tempfile +import time +import uuid + +from .fragment import FragmentFD +from ..compat import functools +from ..networking import Request +from ..postprocessor.ffmpeg import EXT_TO_OUT_FORMATS, FFmpegPostProcessor +from ..utils import ( + Popen, + RetryManager, + _configuration_args, + check_executable, + classproperty, + cli_bool_option, + cli_option, + cli_valueless_option, + determine_ext, + encodeArgument, + encodeFilename, + find_available_port, + remove_end, + traverse_obj, +) + + +class Features(enum.Enum): + TO_STDOUT = enum.auto() + MULTIPLE_FORMATS = enum.auto() + + +class ExternalFD(FragmentFD): + SUPPORTED_PROTOCOLS = ('http', 'https', 'ftp', 'ftps') + SUPPORTED_FEATURES = () + _CAPTURE_STDERR = True + + def real_download(self, filename, info_dict): + self.report_destination(filename) + tmpfilename = self.temp_name(filename) + self._cookies_tempfile = None + + try: + started = time.time() + retval = self._call_downloader(tmpfilename, info_dict) + except KeyboardInterrupt: + if not info_dict.get('is_live'): + raise + # Live stream downloading cancellation should be considered as + # correct and expected termination thus all postprocessing + # should take place + retval = 0 + self.to_screen('[%s] Interrupted by user' % self.get_basename()) + finally: + if self._cookies_tempfile: + self.try_remove(self._cookies_tempfile) + + if retval == 0: + status = { + 'filename': filename, + 'status': 'finished', + 'elapsed': time.time() - started, + } + if filename != '-': + fsize = os.path.getsize(encodeFilename(tmpfilename)) + self.try_rename(tmpfilename, filename) + status.update({ + 'downloaded_bytes': fsize, + 'total_bytes': fsize, + }) + self._hook_progress(status, info_dict) + return True + else: + self.to_stderr('\n') + self.report_error('%s exited with code %d' % ( + self.get_basename(), retval)) + return False + + @classmethod + def get_basename(cls): + return cls.__name__[:-2].lower() + + @classproperty + def EXE_NAME(cls): + return cls.get_basename() + + @functools.cached_property + def exe(self): + return self.EXE_NAME + + @classmethod + def available(cls, path=None): + path = check_executable( + cls.EXE_NAME if path in (None, cls.get_basename()) else path, + [cls.AVAILABLE_OPT]) + if not path: + return False + cls.exe = path + return path + + @classmethod + def supports(cls, info_dict): + return all(( + not info_dict.get('to_stdout') or Features.TO_STDOUT in cls.SUPPORTED_FEATURES, + '+' not in info_dict['protocol'] or Features.MULTIPLE_FORMATS in cls.SUPPORTED_FEATURES, + not traverse_obj(info_dict, ('hls_aes', ...), 'extra_param_to_segment_url'), + all(proto in cls.SUPPORTED_PROTOCOLS for proto in info_dict['protocol'].split('+')), + )) + + @classmethod + def can_download(cls, info_dict, path=None): + return cls.available(path) and cls.supports(info_dict) + + def _option(self, command_option, param): + return cli_option(self.params, command_option, param) + + def _bool_option(self, command_option, param, true_value='true', false_value='false', separator=None): + return cli_bool_option(self.params, command_option, param, true_value, false_value, separator) + + def _valueless_option(self, command_option, param, expected_value=True): + return cli_valueless_option(self.params, command_option, param, expected_value) + + def _configuration_args(self, keys=None, *args, **kwargs): + return _configuration_args( + self.get_basename(), self.params.get('external_downloader_args'), self.EXE_NAME, + keys, *args, **kwargs) + + def _write_cookies(self): + if not self.ydl.cookiejar.filename: + tmp_cookies = tempfile.NamedTemporaryFile(suffix='.cookies', delete=False) + tmp_cookies.close() + self._cookies_tempfile = tmp_cookies.name + self.to_screen(f'[download] Writing temporary cookies file to "{self._cookies_tempfile}"') + # real_download resets _cookies_tempfile; if it's None then save() will write to cookiejar.filename + self.ydl.cookiejar.save(self._cookies_tempfile) + return self.ydl.cookiejar.filename or self._cookies_tempfile + + def _call_downloader(self, tmpfilename, info_dict): + """ Either overwrite this or implement _make_cmd """ + cmd = [encodeArgument(a) for a in self._make_cmd(tmpfilename, info_dict)] + + self._debug_cmd(cmd) + + if 'fragments' not in info_dict: + _, stderr, returncode = self._call_process(cmd, info_dict) + if returncode and stderr: + self.to_stderr(stderr) + return returncode + + skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True) + + retry_manager = RetryManager(self.params.get('fragment_retries'), self.report_retry, + frag_index=None, fatal=not skip_unavailable_fragments) + for retry in retry_manager: + _, stderr, returncode = self._call_process(cmd, info_dict) + if not returncode: + break + # TODO: Decide whether to retry based on error code + # https://aria2.github.io/manual/en/html/aria2c.html#exit-status + if stderr: + self.to_stderr(stderr) + retry.error = Exception() + continue + if not skip_unavailable_fragments and retry_manager.error: + return -1 + + decrypt_fragment = self.decrypter(info_dict) + dest, _ = self.sanitize_open(tmpfilename, 'wb') + for frag_index, fragment in enumerate(info_dict['fragments']): + fragment_filename = '%s-Frag%d' % (tmpfilename, frag_index) + try: + src, _ = self.sanitize_open(fragment_filename, 'rb') + except OSError as err: + if skip_unavailable_fragments and frag_index > 1: + self.report_skip_fragment(frag_index, err) + continue + self.report_error(f'Unable to open fragment {frag_index}; {err}') + return -1 + dest.write(decrypt_fragment(fragment, src.read())) + src.close() + if not self.params.get('keep_fragments', False): + self.try_remove(encodeFilename(fragment_filename)) + dest.close() + self.try_remove(encodeFilename('%s.frag.urls' % tmpfilename)) + return 0 + + def _call_process(self, cmd, info_dict): + return Popen.run(cmd, text=True, stderr=subprocess.PIPE if self._CAPTURE_STDERR else None) + + +class CurlFD(ExternalFD): + AVAILABLE_OPT = '-V' + _CAPTURE_STDERR = False # curl writes the progress to stderr + + def _make_cmd(self, tmpfilename, info_dict): + cmd = [self.exe, '--location', '-o', tmpfilename, '--compressed'] + cookie_header = self.ydl.cookiejar.get_cookie_header(info_dict['url']) + if cookie_header: + cmd += ['--cookie', cookie_header] + if info_dict.get('http_headers') is not None: + for key, val in info_dict['http_headers'].items(): + cmd += ['--header', f'{key}: {val}'] + + cmd += self._bool_option('--continue-at', 'continuedl', '-', '0') + cmd += self._valueless_option('--silent', 'noprogress') + cmd += self._valueless_option('--verbose', 'verbose') + cmd += self._option('--limit-rate', 'ratelimit') + retry = self._option('--retry', 'retries') + if len(retry) == 2: + if retry[1] in ('inf', 'infinite'): + retry[1] = '2147483647' + cmd += retry + cmd += self._option('--max-filesize', 'max_filesize') + cmd += self._option('--interface', 'source_address') + cmd += self._option('--proxy', 'proxy') + cmd += self._valueless_option('--insecure', 'nocheckcertificate') + cmd += self._configuration_args() + cmd += ['--', info_dict['url']] + return cmd + + +class AxelFD(ExternalFD): + AVAILABLE_OPT = '-V' + + def _make_cmd(self, tmpfilename, info_dict): + cmd = [self.exe, '-o', tmpfilename] + if info_dict.get('http_headers') is not None: + for key, val in info_dict['http_headers'].items(): + cmd += ['-H', f'{key}: {val}'] + cookie_header = self.ydl.cookiejar.get_cookie_header(info_dict['url']) + if cookie_header: + cmd += ['-H', f'Cookie: {cookie_header}', '--max-redirect=0'] + cmd += self._configuration_args() + cmd += ['--', info_dict['url']] + return cmd + + +class WgetFD(ExternalFD): + AVAILABLE_OPT = '--version' + + def _make_cmd(self, tmpfilename, info_dict): + cmd = [self.exe, '-O', tmpfilename, '-nv', '--compression=auto'] + if self.ydl.cookiejar.get_cookie_header(info_dict['url']): + cmd += ['--load-cookies', self._write_cookies()] + if info_dict.get('http_headers') is not None: + for key, val in info_dict['http_headers'].items(): + cmd += ['--header', f'{key}: {val}'] + cmd += self._option('--limit-rate', 'ratelimit') + retry = self._option('--tries', 'retries') + if len(retry) == 2: + if retry[1] in ('inf', 'infinite'): + retry[1] = '0' + cmd += retry + cmd += self._option('--bind-address', 'source_address') + proxy = self.params.get('proxy') + if proxy: + for var in ('http_proxy', 'https_proxy'): + cmd += ['--execute', f'{var}={proxy}'] + cmd += self._valueless_option('--no-check-certificate', 'nocheckcertificate') + cmd += self._configuration_args() + cmd += ['--', info_dict['url']] + return cmd + + +class Aria2cFD(ExternalFD): + AVAILABLE_OPT = '-v' + SUPPORTED_PROTOCOLS = ('http', 'https', 'ftp', 'ftps', 'dash_frag_urls', 'm3u8_frag_urls') + + @staticmethod + def supports_manifest(manifest): + UNSUPPORTED_FEATURES = [ + r'#EXT-X-BYTERANGE', # playlists composed of byte ranges of media files [1] + # 1. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.2 + ] + check_results = (not re.search(feature, manifest) for feature in UNSUPPORTED_FEATURES) + return all(check_results) + + @staticmethod + def _aria2c_filename(fn): + return fn if os.path.isabs(fn) else f'.{os.path.sep}{fn}' + + def _call_downloader(self, tmpfilename, info_dict): + # FIXME: Disabled due to https://github.com/yt-dlp/yt-dlp/issues/5931 + if False and 'no-external-downloader-progress' not in self.params.get('compat_opts', []): + info_dict['__rpc'] = { + 'port': find_available_port() or 19190, + 'secret': str(uuid.uuid4()), + } + return super()._call_downloader(tmpfilename, info_dict) + + def _make_cmd(self, tmpfilename, info_dict): + cmd = [self.exe, '-c', '--no-conf', + '--console-log-level=warn', '--summary-interval=0', '--download-result=hide', + '--http-accept-gzip=true', '--file-allocation=none', '-x16', '-j16', '-s16'] + if 'fragments' in info_dict: + cmd += ['--allow-overwrite=true', '--allow-piece-length-change=true'] + else: + cmd += ['--min-split-size', '1M'] + + if self.ydl.cookiejar.get_cookie_header(info_dict['url']): + cmd += [f'--load-cookies={self._write_cookies()}'] + if info_dict.get('http_headers') is not None: + for key, val in info_dict['http_headers'].items(): + cmd += ['--header', f'{key}: {val}'] + cmd += self._option('--max-overall-download-limit', 'ratelimit') + cmd += self._option('--interface', 'source_address') + cmd += self._option('--all-proxy', 'proxy') + cmd += self._bool_option('--check-certificate', 'nocheckcertificate', 'false', 'true', '=') + cmd += self._bool_option('--remote-time', 'updatetime', 'true', 'false', '=') + cmd += self._bool_option('--show-console-readout', 'noprogress', 'false', 'true', '=') + cmd += self._configuration_args() + + if '__rpc' in info_dict: + cmd += [ + '--enable-rpc', + f'--rpc-listen-port={info_dict["__rpc"]["port"]}', + f'--rpc-secret={info_dict["__rpc"]["secret"]}'] + + # aria2c strips out spaces from the beginning/end of filenames and paths. + # We work around this issue by adding a "./" to the beginning of the + # filename and relative path, and adding a "/" at the end of the path. + # See: https://github.com/yt-dlp/yt-dlp/issues/276 + # https://github.com/ytdl-org/youtube-dl/issues/20312 + # https://github.com/aria2/aria2/issues/1373 + dn = os.path.dirname(tmpfilename) + if dn: + cmd += ['--dir', self._aria2c_filename(dn) + os.path.sep] + if 'fragments' not in info_dict: + cmd += ['--out', self._aria2c_filename(os.path.basename(tmpfilename))] + cmd += ['--auto-file-renaming=false'] + + if 'fragments' in info_dict: + cmd += ['--uri-selector=inorder'] + url_list_file = '%s.frag.urls' % tmpfilename + url_list = [] + for frag_index, fragment in enumerate(info_dict['fragments']): + fragment_filename = '%s-Frag%d' % (os.path.basename(tmpfilename), frag_index) + url_list.append('%s\n\tout=%s' % (fragment['url'], self._aria2c_filename(fragment_filename))) + stream, _ = self.sanitize_open(url_list_file, 'wb') + stream.write('\n'.join(url_list).encode()) + stream.close() + cmd += ['-i', self._aria2c_filename(url_list_file)] + else: + cmd += ['--', info_dict['url']] + return cmd + + def aria2c_rpc(self, rpc_port, rpc_secret, method, params=()): + # Does not actually need to be UUID, just unique + sanitycheck = str(uuid.uuid4()) + d = json.dumps({ + 'jsonrpc': '2.0', + 'id': sanitycheck, + 'method': method, + 'params': [f'token:{rpc_secret}', *params], + }).encode('utf-8') + request = Request( + f'http://localhost:{rpc_port}/jsonrpc', + data=d, headers={ + 'Content-Type': 'application/json', + 'Content-Length': f'{len(d)}', + }, proxies={'all': None}) + with self.ydl.urlopen(request) as r: + resp = json.load(r) + assert resp.get('id') == sanitycheck, 'Something went wrong with RPC server' + return resp['result'] + + def _call_process(self, cmd, info_dict): + if '__rpc' not in info_dict: + return super()._call_process(cmd, info_dict) + + send_rpc = functools.partial(self.aria2c_rpc, info_dict['__rpc']['port'], info_dict['__rpc']['secret']) + started = time.time() + + fragmented = 'fragments' in info_dict + frag_count = len(info_dict['fragments']) if fragmented else 1 + status = { + 'filename': info_dict.get('_filename'), + 'status': 'downloading', + 'elapsed': 0, + 'downloaded_bytes': 0, + 'fragment_count': frag_count if fragmented else None, + 'fragment_index': 0 if fragmented else None, + } + self._hook_progress(status, info_dict) + + def get_stat(key, *obj, average=False): + val = tuple(filter(None, map(float, traverse_obj(obj, (..., ..., key))))) or [0] + return sum(val) / (len(val) if average else 1) + + with Popen(cmd, text=True, stdout=subprocess.DEVNULL, stderr=subprocess.PIPE) as p: + # Add a small sleep so that RPC client can receive response, + # or the connection stalls infinitely + time.sleep(0.2) + retval = p.poll() + while retval is None: + # We don't use tellStatus as we won't know the GID without reading stdout + # Ref: https://aria2.github.io/manual/en/html/aria2c.html#aria2.tellActive + active = send_rpc('aria2.tellActive') + completed = send_rpc('aria2.tellStopped', [0, frag_count]) + + downloaded = get_stat('totalLength', completed) + get_stat('completedLength', active) + speed = get_stat('downloadSpeed', active) + total = frag_count * get_stat('totalLength', active, completed, average=True) + if total < downloaded: + total = None + + status.update({ + 'downloaded_bytes': int(downloaded), + 'speed': speed, + 'total_bytes': None if fragmented else total, + 'total_bytes_estimate': total, + 'eta': (total - downloaded) / (speed or 1), + 'fragment_index': min(frag_count, len(completed) + 1) if fragmented else None, + 'elapsed': time.time() - started + }) + self._hook_progress(status, info_dict) + + if not active and len(completed) >= frag_count: + send_rpc('aria2.shutdown') + retval = p.wait() + break + + time.sleep(0.1) + retval = p.poll() + + return '', p.stderr.read(), retval + + +class HttpieFD(ExternalFD): + AVAILABLE_OPT = '--version' + EXE_NAME = 'http' + + def _make_cmd(self, tmpfilename, info_dict): + cmd = ['http', '--download', '--output', tmpfilename, info_dict['url']] + + if info_dict.get('http_headers') is not None: + for key, val in info_dict['http_headers'].items(): + cmd += [f'{key}:{val}'] + + # httpie 3.1.0+ removes the Cookie header on redirect, so this should be safe for now. [1] + # If we ever need cookie handling for redirects, we can export the cookiejar into a session. [2] + # 1: https://github.com/httpie/httpie/security/advisories/GHSA-9w4w-cpc8-h2fq + # 2: https://httpie.io/docs/cli/sessions + cookie_header = self.ydl.cookiejar.get_cookie_header(info_dict['url']) + if cookie_header: + cmd += [f'Cookie:{cookie_header}'] + return cmd + + +class FFmpegFD(ExternalFD): + SUPPORTED_PROTOCOLS = ('http', 'https', 'ftp', 'ftps', 'm3u8', 'm3u8_native', 'rtsp', 'rtmp', 'rtmp_ffmpeg', 'mms', 'http_dash_segments') + SUPPORTED_FEATURES = (Features.TO_STDOUT, Features.MULTIPLE_FORMATS) + + @classmethod + def available(cls, path=None): + # TODO: Fix path for ffmpeg + # Fixme: This may be wrong when --ffmpeg-location is used + return FFmpegPostProcessor().available + + def on_process_started(self, proc, stdin): + """ Override this in subclasses """ + pass + + @classmethod + def can_merge_formats(cls, info_dict, params): + return ( + info_dict.get('requested_formats') + and info_dict.get('protocol') + and not params.get('allow_unplayable_formats') + and 'no-direct-merge' not in params.get('compat_opts', []) + and cls.can_download(info_dict)) + + def _call_downloader(self, tmpfilename, info_dict): + ffpp = FFmpegPostProcessor(downloader=self) + if not ffpp.available: + self.report_error('m3u8 download detected but ffmpeg could not be found. Please install') + return False + ffpp.check_version() + + args = [ffpp.executable, '-y'] + + for log_level in ('quiet', 'verbose'): + if self.params.get(log_level, False): + args += ['-loglevel', log_level] + break + if not self.params.get('verbose'): + args += ['-hide_banner'] + + args += traverse_obj(info_dict, ('downloader_options', 'ffmpeg_args'), default=[]) + + # These exists only for compatibility. Extractors should use + # info_dict['downloader_options']['ffmpeg_args'] instead + args += info_dict.get('_ffmpeg_args') or [] + seekable = info_dict.get('_seekable') + if seekable is not None: + # setting -seekable prevents ffmpeg from guessing if the server + # supports seeking(by adding the header `Range: bytes=0-`), which + # can cause problems in some cases + # https://github.com/ytdl-org/youtube-dl/issues/11800#issuecomment-275037127 + # http://trac.ffmpeg.org/ticket/6125#comment:10 + args += ['-seekable', '1' if seekable else '0'] + + env = None + proxy = self.params.get('proxy') + if proxy: + if not re.match(r'^[\da-zA-Z]+://', proxy): + proxy = 'http://%s' % proxy + + if proxy.startswith('socks'): + self.report_warning( + '%s does not support SOCKS proxies. Downloading is likely to fail. ' + 'Consider adding --hls-prefer-native to your command.' % self.get_basename()) + + # Since December 2015 ffmpeg supports -http_proxy option (see + # http://git.videolan.org/?p=ffmpeg.git;a=commit;h=b4eb1f29ebddd60c41a2eb39f5af701e38e0d3fd) + # We could switch to the following code if we are able to detect version properly + # args += ['-http_proxy', proxy] + env = os.environ.copy() + env['HTTP_PROXY'] = proxy + env['http_proxy'] = proxy + + protocol = info_dict.get('protocol') + + if protocol == 'rtmp': + player_url = info_dict.get('player_url') + page_url = info_dict.get('page_url') + app = info_dict.get('app') + play_path = info_dict.get('play_path') + tc_url = info_dict.get('tc_url') + flash_version = info_dict.get('flash_version') + live = info_dict.get('rtmp_live', False) + conn = info_dict.get('rtmp_conn') + if player_url is not None: + args += ['-rtmp_swfverify', player_url] + if page_url is not None: + args += ['-rtmp_pageurl', page_url] + if app is not None: + args += ['-rtmp_app', app] + if play_path is not None: + args += ['-rtmp_playpath', play_path] + if tc_url is not None: + args += ['-rtmp_tcurl', tc_url] + if flash_version is not None: + args += ['-rtmp_flashver', flash_version] + if live: + args += ['-rtmp_live', 'live'] + if isinstance(conn, list): + for entry in conn: + args += ['-rtmp_conn', entry] + elif isinstance(conn, str): + args += ['-rtmp_conn', conn] + + start_time, end_time = info_dict.get('section_start') or 0, info_dict.get('section_end') + + selected_formats = info_dict.get('requested_formats') or [info_dict] + for i, fmt in enumerate(selected_formats): + is_http = re.match(r'^https?://', fmt['url']) + cookies = self.ydl.cookiejar.get_cookies_for_url(fmt['url']) if is_http else [] + if cookies: + args.extend(['-cookies', ''.join( + f'{cookie.name}={cookie.value}; path={cookie.path}; domain={cookie.domain};\r\n' + for cookie in cookies)]) + if fmt.get('http_headers') and is_http: + # Trailing \r\n after each HTTP header is important to prevent warning from ffmpeg/avconv: + # [http @ 00000000003d2fa0] No trailing CRLF found in HTTP header. + args.extend(['-headers', ''.join(f'{key}: {val}\r\n' for key, val in fmt['http_headers'].items())]) + + if start_time: + args += ['-ss', str(start_time)] + if end_time: + args += ['-t', str(end_time - start_time)] + + args += self._configuration_args((f'_i{i + 1}', '_i')) + ['-i', fmt['url']] + + if not (start_time or end_time) or not self.params.get('force_keyframes_at_cuts'): + args += ['-c', 'copy'] + + if info_dict.get('requested_formats') or protocol == 'http_dash_segments': + for i, fmt in enumerate(selected_formats): + stream_number = fmt.get('manifest_stream_number', 0) + args.extend(['-map', f'{i}:{stream_number}']) + + if self.params.get('test', False): + args += ['-fs', str(self._TEST_FILE_SIZE)] + + ext = info_dict['ext'] + if protocol in ('m3u8', 'm3u8_native'): + use_mpegts = (tmpfilename == '-') or self.params.get('hls_use_mpegts') + if use_mpegts is None: + use_mpegts = info_dict.get('is_live') + if use_mpegts: + args += ['-f', 'mpegts'] + else: + args += ['-f', 'mp4'] + if (ffpp.basename == 'ffmpeg' and ffpp._features.get('needs_adtstoasc')) and (not info_dict.get('acodec') or info_dict['acodec'].split('.')[0] in ('aac', 'mp4a')): + args += ['-bsf:a', 'aac_adtstoasc'] + elif protocol == 'rtmp': + args += ['-f', 'flv'] + elif ext == 'mp4' and tmpfilename == '-': + args += ['-f', 'mpegts'] + elif ext == 'unknown_video': + ext = determine_ext(remove_end(tmpfilename, '.part')) + if ext == 'unknown_video': + self.report_warning( + 'The video format is unknown and cannot be downloaded by ffmpeg. ' + 'Explicitly set the extension in the filename to attempt download in that format') + else: + self.report_warning(f'The video format is unknown. Trying to download as {ext} according to the filename') + args += ['-f', EXT_TO_OUT_FORMATS.get(ext, ext)] + else: + args += ['-f', EXT_TO_OUT_FORMATS.get(ext, ext)] + + args += self._configuration_args(('_o1', '_o', '')) + + args = [encodeArgument(opt) for opt in args] + args.append(encodeFilename(ffpp._ffmpeg_filename_argument(tmpfilename), True)) + self._debug_cmd(args) + + piped = any(fmt['url'] in ('-', 'pipe:') for fmt in selected_formats) + with Popen(args, stdin=subprocess.PIPE, env=env) as proc: + if piped: + self.on_process_started(proc, proc.stdin) + try: + retval = proc.wait() + except BaseException as e: + # subprocces.run would send the SIGKILL signal to ffmpeg and the + # mp4 file couldn't be played, but if we ask ffmpeg to quit it + # produces a file that is playable (this is mostly useful for live + # streams). Note that Windows is not affected and produces playable + # files (see https://github.com/ytdl-org/youtube-dl/issues/8300). + if isinstance(e, KeyboardInterrupt) and sys.platform != 'win32' and not piped: + proc.communicate_or_kill(b'q') + else: + proc.kill(timeout=None) + raise + return retval + + +class AVconvFD(FFmpegFD): + pass + + +_BY_NAME = { + klass.get_basename(): klass + for name, klass in globals().items() + if name.endswith('FD') and name not in ('ExternalFD', 'FragmentFD') +} + + +def list_external_downloaders(): + return sorted(_BY_NAME.keys()) + + +def get_external_downloader(external_downloader): + """ Given the name of the executable, see whether we support the given downloader """ + bn = os.path.splitext(os.path.basename(external_downloader))[0] + return _BY_NAME.get(bn) or next(( + klass for klass in _BY_NAME.values() if klass.EXE_NAME in bn + ), None) |