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""" |
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ffmpeg_streaming.media |
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~~~~~~~~~~~~ |
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HLS helper |
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:copyright: (c) 2020 by Amin Yazdanpanah. |
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:website: https://www.aminyazdanpanah.com |
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:email: [email protected] |
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:license: MIT, see LICENSE for more details. |
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""" |
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import os |
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import uuid |
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from secrets import token_bytes, token_hex |
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from ffmpeg_streaming._utiles import mkdir, get_path_info |
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class HLSKeyInfoFile: |
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def __init__(self, key_info_file_path: str, path: str, url: str, period: int = 0, needle: str = '', length: int = 16): |
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""" |
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@TODO: add documentation |
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""" |
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self.needle = needle |
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self.period = period |
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self.segments = [] |
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self.length = length |
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self.url = self.c_url = url |
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self.path = self.c_path = path |
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mkdir(os.path.dirname(path)) |
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self.key_info_file_path = key_info_file_path |
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def __str__(self): |
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""" |
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@TODO: add documentation |
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""" |
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self.generate() |
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return self.key_info_file_path |
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def generate(self): |
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""" |
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@TODO: add documentation |
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""" |
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self.generate_key() |
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self.update_key_info_file() |
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def generate_key(self): |
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""" |
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@TODO: add documentation |
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""" |
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with open(self.path, 'wb') as key: |
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key.write(token_bytes(self.length)) |
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def update_key_info_file(self): |
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""" |
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@TODO: add documentation |
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""" |
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with open(self.key_info_file_path, 'w') as key_info_file: |
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key_info_file.write("\n".join([self.url, self.path, token_hex(self.length)])) |
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def update_suffix(self): |
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""" |
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@TODO: add documentation |
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""" |
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unique = uuid.uuid4() |
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self.path = f'{self.c_path}-' + str(unique) |
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self.url = f'{self.c_url}-' + str(unique) |
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def rotate_key(self, line: str): |
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""" |
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@TODO: add documentation |
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""" |
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if self.needle in line and line not in self.segments: |
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self.segments.append(line) |
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if len(self.segments) % self.period == 0: |
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self.update_suffix() |
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self.generate() |
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def sub_info(rep, sub_path) -> list: |
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""" |
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Returns the subtitle information to be added to manifest. |
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Parameters |
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---------- |
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rep : Representation |
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sub_path : subtitle manifest file name |
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""" |
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tag = '#EXT-X-MEDIA:' |
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info = [ |
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'TYPE=SUBTITLES', |
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'GROUP-ID="subs"', |
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'NAME="subtitles"', |
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f'URI="{sub_path}' + '"', |
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] |
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return [tag + ",".join(info)] |
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def stream_info(rep, sub_exists) -> list: |
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""" |
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@TODO: add documentation |
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""" |
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tag = '#EXT-X-STREAM-INF:' |
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info = [ |
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f'BANDWIDTH={rep.bitrate.calc_overall}', |
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f'RESOLUTION={rep.size}', |
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f'NAME="{rep.size.height}"' |
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] |
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if sub_exists: |
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info.append('SUBTITLES="subs"') |
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custom = rep.options.pop('stream_info', []) |
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return [tag + ",".join(info + custom)] |
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class HLSMasterPlaylist: |
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def __init__(self, media): |
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""" |
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@TODO: add documentation |
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""" |
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self.media = media |
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@classmethod |
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def generate(cls, media, path=None): |
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if path is None: |
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path = "{}.m3u8".format(os.path.join(*get_path_info(media.output_))) |
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with open(path, 'w', encoding='utf-8') as playlist: |
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playlist.write(cls(media)._content()) |
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def _content(self) -> str: |
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""" |
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@TODO: add documentation |
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""" |
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content = ['#EXTM3U'] + self._get_version() + self.media.options.get('description', []) |
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for rep in self.media.reps: |
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if sub_exists := os.path.isfile( |
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os.path.dirname(self.media.output_) + '/' + self.sub_path(rep)[0] |
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): |
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content += sub_info(rep,self.sub_path(rep)[0]) + stream_info(rep,sub_exists) + self.stream_path(rep) |
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else: |
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content += stream_info(rep,sub_exists) + self.stream_path(rep) |
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return "\n".join(content) |
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def _get_version(self) -> list: |
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""" |
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@TODO: add documentation |
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""" |
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version = "7" if self.media.options.get('hls_segment_type', '') == 'fmp4' else "3" |
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return [f'#EXT-X-VERSION:{version}'] |
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def stream_path(self, rep): |
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""" |
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@TODO: add documentation |
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""" |
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return ["{}_{}p.m3u8".format(os.path.basename(self.media.output_).split('.')[0], rep.size.height)] |
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def sub_path(self, rep): |
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""" |
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Returns the subtitles maifest file name. |
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Parameters |
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---------- |
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rep : Representation |
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""" |
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return ["{}_{}p_vtt.m3u8".format(os.path.basename(self.media.output_).split('.')[0], rep.size.height)] |
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aminyazdanpanah /
python-ffmpeg-video-streaming
