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author | James Taylor <user234683@users.noreply.github.com> | 2019-12-19 21:33:54 -0800 |
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committer | James Taylor <user234683@users.noreply.github.com> | 2019-12-19 21:33:54 -0800 |
commit | b4406df9cf33c53b6e942e6a5c72d955f57c4b5f (patch) | |
tree | 4de0082ac9eb26a05188dd424835ea50b1483113 /youtube_dl/downloader/hls.py | |
parent | b614fcdb8579ba29fccfa47eab1e2965cfb0beaa (diff) | |
parent | 6b7a1212e30b713453aa7d2b3a7122e97689dad0 (diff) | |
download | yt-local-b4406df9cf33c53b6e942e6a5c72d955f57c4b5f.tar.lz yt-local-b4406df9cf33c53b6e942e6a5c72d955f57c4b5f.tar.xz yt-local-b4406df9cf33c53b6e942e6a5c72d955f57c4b5f.zip |
Merge branch 'modular-data-extract'
Commits in this branch are prefixed with "Extraction:"
This branch refactors data extraction. All such functionality has been moved to the yt_data_extract module.
Responses from requests are given to the module and it parses them into a consistent, more useful format.
The dependency on youtube-dl has also been dropped and this functionality has been built from scratch for these reasons:
(1) I've noticed youtube-dl breaks more often than invidious (which uses watch page extraction built from scratch) in response to changes from Youtube, so I'm hoping what I wrote will also be less brittle.
(2) Such breakage is inconvenient because I have to manually merge the fixes since I had to make changes to youtube-dl to make it do things such as extracting related videos.
(3) I have no control over error handling and request pooling with youtube-dl, since it does all the requests (these would require intrusive changes I don't want to maintain).
(4) I will now be able to finally display the number of comments and whether comments are disabled without making additional requests.
Diffstat (limited to 'youtube_dl/downloader/hls.py')
-rw-r--r-- | youtube_dl/downloader/hls.py | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/youtube_dl/downloader/hls.py b/youtube_dl/downloader/hls.py deleted file mode 100644 index fd30452..0000000 --- a/youtube_dl/downloader/hls.py +++ /dev/null @@ -1,204 +0,0 @@ -from __future__ import unicode_literals - -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_urllib_error, - compat_urlparse, - compat_struct_pack, -) -from ..utils import ( - parse_m3u8_attributes, - update_url_query, -) - - -class HlsFD(FragmentFD): - """ A limited implementation that does not require ffmpeg """ - - FD_NAME = 'hlsnative' - - @staticmethod - def can_download(manifest, info_dict): - 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] - is_aes128_enc = '#EXT-X-KEY:METHOD=AES-128' in manifest - check_results.append(can_decrypt_frag 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 real_download(self, filename, info_dict): - man_url = info_dict['url'] - self.to_screen('[%s] Downloading m3u8 manifest' % self.FD_NAME) - - urlh = self.ydl.urlopen(self._prepare_url(info_dict, man_url)) - man_url = urlh.geturl() - s = urlh.read().decode('utf-8', 'ignore') - - if not self.can_download(s, info_dict): - if info_dict.get('extra_param_to_segment_url'): - self.report_error('pycrypto not found. Please install it.') - return False - 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) - - def is_ad_fragment(s): - return (s.startswith('#ANVATO-SEGMENT-INFO') and 'type=ad' in s or - s.startswith('#UPLYNK-SEGMENT') and s.endswith(',ad')) - - media_frags = 0 - ad_frags = 0 - ad_frag_next = False - for line in s.splitlines(): - line = line.strip() - if not line: - continue - if line.startswith('#'): - if is_ad_fragment(line): - ad_frags += 1 - ad_frag_next = True - continue - if ad_frag_next: - ad_frag_next = False - continue - media_frags += 1 - - ctx = { - 'filename': filename, - 'total_frags': media_frags, - 'ad_frags': ad_frags, - } - - self._prepare_and_start_frag_download(ctx) - - fragment_retries = self.params.get('fragment_retries', 0) - skip_unavailable_fragments = self.params.get('skip_unavailable_fragments', True) - test = self.params.get('test', False) - - extra_query = None - extra_param_to_segment_url = info_dict.get('extra_param_to_segment_url') - if extra_param_to_segment_url: - extra_query = compat_urlparse.parse_qs(extra_param_to_segment_url) - i = 0 - media_sequence = 0 - decrypt_info = {'METHOD': 'NONE'} - byte_range = {} - frag_index = 0 - ad_frag_next = False - for line in s.splitlines(): - line = line.strip() - if line: - if not line.startswith('#'): - if ad_frag_next: - ad_frag_next = False - continue - frag_index += 1 - if frag_index <= ctx['fragment_index']: - continue - frag_url = ( - line - if re.match(r'^https?://', line) - else compat_urlparse.urljoin(man_url, line)) - if extra_query: - frag_url = update_url_query(frag_url, extra_query) - count = 0 - headers = info_dict.get('http_headers', {}) - if byte_range: - headers['Range'] = 'bytes=%d-%d' % (byte_range['start'], byte_range['end']) - while count <= fragment_retries: - try: - success, frag_content = self._download_fragment( - ctx, frag_url, info_dict, headers) - if not success: - return False - break - except compat_urllib_error.HTTPError as err: - # Unavailable (possibly temporary) fragments may be served. - # First we try to retry then either skip or abort. - # See https://github.com/rg3/youtube-dl/issues/10165, - # https://github.com/rg3/youtube-dl/issues/10448). - count += 1 - if count <= fragment_retries: - self.report_retry_fragment(err, frag_index, count, fragment_retries) - if count > fragment_retries: - if skip_unavailable_fragments: - i += 1 - media_sequence += 1 - self.report_skip_fragment(frag_index) - continue - self.report_error( - 'giving up after %s fragment retries' % fragment_retries) - return False - if decrypt_info['METHOD'] == 'AES-128': - iv = decrypt_info.get('IV') or compat_struct_pack('>8xq', media_sequence) - decrypt_info['KEY'] = decrypt_info.get('KEY') or self.ydl.urlopen( - self._prepare_url(info_dict, decrypt_info['URI'])).read() - frag_content = AES.new( - decrypt_info['KEY'], AES.MODE_CBC, iv).decrypt(frag_content) - self._append_fragment(ctx, frag_content) - # We only download the first fragment during the test - if test: - 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 - 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(line): - ad_frag_next = True - - self._finish_frag_download(ctx) - - return True |