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More improvements to HLS/DASH external downloader code

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* Fix error when there is no `protocol` in `info_dict`
* Move HLS byte range detection to `Aria2cFD` so that the download will fall back to the native downloader instead of ffmpeg
* Fix bug with getting no fragments in DASH
* Convert `check_results` in `can_download` to a generator
This commit is contained in:
pukkandan
2021-03-10 20:56:24 +05:30
parent e4edeb6226
commit 0a473f2f0f
5 changed files with 44 additions and 22 deletions
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35
yt_dlp/downloader/hls.py
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@@ -24,12 +24,16 @@ from ..utils import (
class HlsFD(FragmentFD):
""" A limited implementation that does not require ffmpeg """
"""
Download segments in a m3u8 manifest. External downloaders can take over
the fragment downloads by supporting the 'frag_urls' protocol and
re-defining 'supports_manifest' function
"""
FD_NAME = 'hlsnative'
@staticmethod
def can_download(manifest, info_dict, allow_unplayable_formats=False, real_downloader=None, with_crypto=can_decrypt_frag):
def can_download(manifest, info_dict, allow_unplayable_formats=False, with_crypto=can_decrypt_frag):
UNSUPPORTED_FEATURES = [
# r'#EXT-X-BYTERANGE', # playlists composed of byte ranges of media files [2]
@@ -53,16 +57,15 @@ class HlsFD(FragmentFD):
UNSUPPORTED_FEATURES += [
r'#EXT-X-KEY:METHOD=(?!NONE|AES-128)', # encrypted streams [1]
]
if real_downloader:
UNSUPPORTED_FEATURES += [
r'#EXT-X-BYTERANGE', # playlists composed of byte ranges of media files [2]
]
check_results = [not re.search(feature, manifest) for feature in UNSUPPORTED_FEATURES]
is_aes128_enc = '#EXT-X-KEY:METHOD=AES-128' in manifest
check_results.append(with_crypto or not is_aes128_enc)
check_results.append(not (is_aes128_enc and r'#EXT-X-BYTERANGE' in manifest))
check_results.append(not info_dict.get('is_live'))
return all(check_results)
def check_results():
yield not info_dict.get('is_live')
is_aes128_enc = '#EXT-X-KEY:METHOD=AES-128' in manifest
yield with_crypto or not is_aes128_enc
yield not (is_aes128_enc and r'#EXT-X-BYTERANGE' in manifest)
for feature in UNSUPPORTED_FEATURES:
yield not re.search(feature, manifest)
return all(check_results())
def real_download(self, filename, info_dict):
man_url = info_dict['url']
@@ -72,9 +75,7 @@ class HlsFD(FragmentFD):
man_url = urlh.geturl()
s = urlh.read().decode('utf-8', 'ignore')
real_downloader = _get_real_downloader(info_dict, 'frag_urls', self.params, None)
if not self.can_download(s, info_dict, self.params.get('allow_unplayable_formats'), real_downloader):
if not self.can_download(s, info_dict, self.params.get('allow_unplayable_formats')):
if info_dict.get('extra_param_to_segment_url') or info_dict.get('_decryption_key_url'):
self.report_error('pycryptodome not found. Please install it.')
return False
@@ -89,6 +90,10 @@ class HlsFD(FragmentFD):
# fd.add_progress_hook(ph)
return fd.real_download(filename, info_dict)
real_downloader = _get_real_downloader(info_dict, 'frag_urls', self.params, None)
if real_downloader and not real_downloader.supports_manifest(s):
real_downloader = None
def is_ad_fragment_start(s):
return (s.startswith('#ANVATO-SEGMENT-INFO') and 'type=ad' in s
or s.startswith('#UPLYNK-SEGMENT') and s.endswith(',ad'))