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Basic support for HLS media initialization (#103)

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Co-authored-by: shirtjs <2660574+shirtjs@users.noreply.github.com>
Co-authored-by: pukkandan <pukkandan@gmail.com>
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shirt-dev 2021-02-23 11:00:56 -05:00 committed by GitHub
parent 389e2956a7
commit b1bb77d75f
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1 changed files with 62 additions and 32 deletions
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94
youtube_dlc/downloader/hls.py
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@ -42,8 +42,8 @@ def can_download(manifest, info_dict, allow_unplayable_formats=False, with_crypt
# 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]
r'#EXT-X-MAP:', # media initialization [5]
# r'#EXT-X-MAP:', # media initialization [5]
r'^\s*(?:[^#\s]|#EXT-X-MAP:).+?\n\s*#EXT-X-MAP:', # media initialization [5]
# 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
@ -142,6 +142,7 @@ def is_ad_fragment_end(s):
ad_frag_next = False
for line in s.splitlines():
line = line.strip()
download_frag = False
if line:
if not line.startswith('#'):
if ad_frag_next:
@ -159,7 +160,66 @@ def is_ad_fragment_end(s):
if real_downloader:
fragment_urls.append(frag_url)
continue
download_frag = True
elif line.startswith('#EXT-X-MAP'):
if frag_index > 0:
self.report_error(
'initialization fragment found after media fragments, unable to download')
return False
frag_index += 1
map_info = parse_m3u8_attributes(line[11:])
frag_url = (
map_info.get('URI')
if re.match(r'^https?://', map_info.get('URI'))
else compat_urlparse.urljoin(man_url, map_info.get('URI')))
if extra_query:
frag_url = update_url_query(frag_url, extra_query)
if real_downloader:
fragment_urls.append(frag_url)
continue
if map_info.get('BYTERANGE'):
splitted_byte_range = map_info.get('BYTERANGE').split('@')
sub_range_start = int(splitted_byte_range[1]) if len(splitted_byte_range) == 2 else byte_range['end']
byte_range = {
'start': sub_range_start,
'end': sub_range_start + int(splitted_byte_range[0]),
}
download_frag = True
elif line.startswith('#EXT-X-KEY'):
decrypt_url = decrypt_info.get('URI')
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:].zfill(32))
if not re.match(r'^https?://', decrypt_info['URI']):
decrypt_info['URI'] = compat_urlparse.urljoin(
man_url, decrypt_info['URI'])
if extra_query:
decrypt_info['URI'] = update_url_query(decrypt_info['URI'], extra_query)
if decrypt_url != decrypt_info['URI']:
decrypt_info['KEY'] = None
key_data = decrypt_info.copy()
key_data['INDEX'] = frag_index
key_list.append(key_data)
elif line.startswith('#EXT-X-MEDIA-SEQUENCE'):
media_sequence = int(line[22:])
elif line.startswith('#EXT-X-BYTERANGE'):
splitted_byte_range = line[17:].split('@')
sub_range_start = int(splitted_byte_range[1]) if len(splitted_byte_range) == 2 else byte_range['end']
byte_range = {
'start': sub_range_start,
'end': sub_range_start + int(splitted_byte_range[0]),
}
elif is_ad_fragment_start(line):
ad_frag_next = True
elif is_ad_fragment_end(line):
ad_frag_next = False
if download_frag:
count = 0
headers = info_dict.get('http_headers', {})
if byte_range:
@ -205,36 +265,6 @@ def is_ad_fragment_end(s):
break
i += 1
media_sequence += 1
elif line.startswith('#EXT-X-KEY'):
decrypt_url = decrypt_info.get('URI')
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:].zfill(32))
if not re.match(r'^https?://', decrypt_info['URI']):
decrypt_info['URI'] = compat_urlparse.urljoin(
man_url, decrypt_info['URI'])
if extra_query:
decrypt_info['URI'] = update_url_query(decrypt_info['URI'], extra_query)
if decrypt_url != decrypt_info['URI']:
decrypt_info['KEY'] = None
key_data = decrypt_info.copy()
key_data['INDEX'] = frag_index
key_list.append(key_data)
elif line.startswith('#EXT-X-MEDIA-SEQUENCE'):
media_sequence = int(line[22:])
elif line.startswith('#EXT-X-BYTERANGE'):
splitted_byte_range = line[17:].split('@')
sub_range_start = int(splitted_byte_range[1]) if len(splitted_byte_range) == 2 else byte_range['end']
byte_range = {
'start': sub_range_start,
'end': sub_range_start + int(splitted_byte_range[0]),
}
elif is_ad_fragment_start(line):
ad_frag_next = True
elif is_ad_fragment_end(line):
ad_frag_next = False
if real_downloader:
info_copy = info_dict.copy()