-import os
-import subprocess
+from __future__ import unicode_literals
-from .common import FileDownloader
+import os.path
+import re
+import binascii
+try:
+ from Crypto.Cipher import AES
+ can_decrypt_frag = True
+except ImportError:
+ can_decrypt_frag = False
+
+from .fragment import FragmentFD
+from .external import FFmpegFD
+
+from ..compat import (
+ compat_urlparse,
+ compat_struct_pack,
+)
from ..utils import (
encodeFilename,
+ sanitize_open,
+ parse_m3u8_attributes,
)
-class HlsFD(FileDownloader):
+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):
- url = info_dict['url']
- self.report_destination(filename)
- tmpfilename = self.temp_name(filename)
-
- args = [
- '-y', '-i', url, '-f', 'mp4', '-c', 'copy',
- '-bsf:a', 'aac_adtstoasc',
- encodeFilename(tmpfilename, for_subprocess=True)]
-
- for program in ['avconv', 'ffmpeg']:
- try:
- subprocess.call([program, '-version'], stdout=(open(os.path.devnull, 'w')), stderr=subprocess.STDOUT)
- break
- except (OSError, IOError):
- pass
- else:
- self.report_error(u'm3u8 download detected but ffmpeg or avconv could not be found')
- cmd = [program] + args
-
- retval = subprocess.call(cmd)
- if retval == 0:
- fsize = os.path.getsize(encodeFilename(tmpfilename))
- self.to_screen(u'\r[%s] %s bytes' % (cmd[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(u"\n")
- self.report_error(u'ffmpeg exited with code %d' % retval)
- return False
+ 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')
+
+ 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('#'):
+ total_frags += 1
+
+ ctx = {
+ 'filename': filename,
+ 'total_frags': total_frags,
+ }
+
+ self._prepare_and_start_frag_download(ctx)
+
+ i = 0
+ media_sequence = 0
+ decrypt_info = {'METHOD': 'NONE'}
+ frags_filenames = []
+ 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)
+
+ for frag_file in frags_filenames:
+ os.remove(encodeFilename(frag_file))
+
+ return True
Rapsys Git / youtubedl / blobdiff