from __future__ import unicode_literals
-import os
+import os.path
import re
-import subprocess
+import binascii
+try:
+ from Crypto.Cipher import AES
+ can_decrypt_frag = True
+except ImportError:
+ can_decrypt_frag = False
-from .common import FileDownloader
from .fragment import FragmentFD
+from .external import FFmpegFD
-from ..compat import compat_urlparse
-from ..postprocessor.ffmpeg import FFmpegPostProcessor
+from ..compat import (
+ compat_urlparse,
+ compat_struct_pack,
+)
from ..utils import (
- encodeArgument,
encodeFilename,
sanitize_open,
+ parse_m3u8_attributes,
)
-class HlsFD(FileDownloader):
- def real_download(self, filename, info_dict):
- url = info_dict['url']
- self.report_destination(filename)
- tmpfilename = self.temp_name(filename)
-
- ffpp = FFmpegPostProcessor(downloader=self)
- if not ffpp.available:
- self.report_error('m3u8 download detected but ffmpeg or avconv could not be found. Please install one.')
- return False
- ffpp.check_version()
-
- args = [ffpp.executable, '-y']
-
- if info_dict['http_headers'] and re.match(r'^https?://', url):
- # 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 += [
- '-headers',
- ''.join('%s: %s\r\n' % (key, val) for key, val in info_dict['http_headers'].items())]
-
- args += ['-i', url, '-f', 'mp4', '-c', 'copy', '-bsf:a', 'aac_adtstoasc']
-
- args = [encodeArgument(opt) for opt in args]
- args.append(encodeFilename(ffpp._ffmpeg_filename_argument(tmpfilename), True))
-
- self._debug_cmd(args)
-
- retval = subprocess.call(args)
- if retval == 0:
- fsize = os.path.getsize(encodeFilename(tmpfilename))
- self.to_screen('\r[%s] %s bytes' % (args[0], fsize))
- self.try_rename(tmpfilename, filename)
- self._hook_progress({
- 'downloaded_bytes': fsize,
- 'total_bytes': fsize,
- 'filename': filename,
- 'status': 'finished',
- })
- return True
- else:
- self.to_stderr('\n')
- self.report_error('%s exited with code %d' % (ffpp.basename, retval))
- return False
-
-
-class NativeHlsFD(FragmentFD):
- """ A more limited implementation that does not require ffmpeg """
+class HlsFD(FragmentFD):
+ """ A limited implementation that does not require ffmpeg """
FD_NAME = 'hlsnative'
+ @staticmethod
+ def can_download(manifest):
+ UNSUPPORTED_FEATURES = (
+ r'#EXT-X-KEY:METHOD=(?!NONE|AES-128)', # encrypted streams [1]
+ r'#EXT-X-BYTERANGE', # playlists composed of byte ranges of media files [2]
+
+ # Live streams heuristic does not always work (e.g. geo restricted to Germany
+ # http://hls-geo.daserste.de/i/videoportal/Film/c_620000/622873/format,716451,716457,716450,716458,716459,.mp4.csmil/index_4_av.m3u8?null=0)
+ # r'#EXT-X-MEDIA-SEQUENCE:(?!0$)', # live streams [3]
+
+ # This heuristic also is not correct since segments may not be appended as well.
+ # Twitch vods of finished streams have EXT-X-PLAYLIST-TYPE:EVENT despite
+ # no segments will definitely be appended to the end of the playlist.
+ # r'#EXT-X-PLAYLIST-TYPE:EVENT', # media segments may be appended to the end of
+ # # event media playlists [4]
+
+ # 1. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.4
+ # 2. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.2.2
+ # 3. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.2
+ # 4. https://tools.ietf.org/html/draft-pantos-http-live-streaming-17#section-4.3.3.5
+ )
+ check_results = [not re.search(feature, manifest) for feature in UNSUPPORTED_FEATURES]
+ check_results.append(can_decrypt_frag or '#EXT-X-KEY:METHOD=AES-128' not in manifest)
+ return all(check_results)
+
def real_download(self, filename, info_dict):
man_url = info_dict['url']
self.to_screen('[%s] Downloading m3u8 manifest' % self.FD_NAME)
manifest = self.ydl.urlopen(man_url).read()
s = manifest.decode('utf-8', 'ignore')
- fragment_urls = []
+
+ if not self.can_download(s):
+ self.report_warning(
+ 'hlsnative has detected features it does not support, '
+ 'extraction will be delegated to ffmpeg')
+ fd = FFmpegFD(self.ydl, self.params)
+ for ph in self._progress_hooks:
+ fd.add_progress_hook(ph)
+ return fd.real_download(filename, info_dict)
+
+ total_frags = 0
for line in s.splitlines():
line = line.strip()
if line and not line.startswith('#'):
- segment_url = (
- line
- if re.match(r'^https?://', line)
- else compat_urlparse.urljoin(man_url, line))
- fragment_urls.append(segment_url)
- # We only download the first fragment during the test
- if self.params.get('test', False):
- break
+ total_frags += 1
ctx = {
'filename': filename,
- 'total_frags': len(fragment_urls),
+ 'total_frags': total_frags,
}
self._prepare_and_start_frag_download(ctx)
+ i = 0
+ media_sequence = 0
+ decrypt_info = {'METHOD': 'NONE'}
frags_filenames = []
- for i, frag_url in enumerate(fragment_urls):
- frag_filename = '%s-Frag%d' % (ctx['tmpfilename'], i)
- success = ctx['dl'].download(frag_filename, {'url': frag_url})
- if not success:
- return False
- down, frag_sanitized = sanitize_open(frag_filename, 'rb')
- ctx['dest_stream'].write(down.read())
- down.close()
- frags_filenames.append(frag_sanitized)
+ for line in s.splitlines():
+ line = line.strip()
+ if line:
+ if not line.startswith('#'):
+ frag_url = (
+ line
+ if re.match(r'^https?://', line)
+ else compat_urlparse.urljoin(man_url, line))
+ frag_filename = '%s-Frag%d' % (ctx['tmpfilename'], i)
+ success = ctx['dl'].download(frag_filename, {'url': frag_url})
+ if not success:
+ return False
+ down, frag_sanitized = sanitize_open(frag_filename, 'rb')
+ frag_content = down.read()
+ down.close()
+ if decrypt_info['METHOD'] == 'AES-128':
+ iv = decrypt_info.get('IV') or compat_struct_pack('>8xq', media_sequence)
+ frag_content = AES.new(
+ decrypt_info['KEY'], AES.MODE_CBC, iv).decrypt(frag_content)
+ ctx['dest_stream'].write(frag_content)
+ frags_filenames.append(frag_sanitized)
+ # We only download the first fragment during the test
+ if self.params.get('test', False):
+ break
+ i += 1
+ media_sequence += 1
+ elif line.startswith('#EXT-X-KEY'):
+ decrypt_info = parse_m3u8_attributes(line[11:])
+ if decrypt_info['METHOD'] == 'AES-128':
+ if 'IV' in decrypt_info:
+ decrypt_info['IV'] = binascii.unhexlify(decrypt_info['IV'][2:])
+ if not re.match(r'^https?://', decrypt_info['URI']):
+ decrypt_info['URI'] = compat_urlparse.urljoin(
+ man_url, decrypt_info['URI'])
+ decrypt_info['KEY'] = self.ydl.urlopen(decrypt_info['URI']).read()
+ elif line.startswith('#EXT-X-MEDIA-SEQUENCE'):
+ media_sequence = int(line[22:])
self._finish_frag_download(ctx)
Rapsys Git / youtubedl / blobdiff