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https://github.com/yt-dlp/yt-dlp.git
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[youtube_live_chat] Support ongoing live chat (#422)
Authored by: siikamiika
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siikamiika
GitHub
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@ -25,7 +25,7 @@ from .ism import IsmFD
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from .mhtml import MhtmlFD
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from .niconico import NiconicoDmcFD
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from .websocket import WebSocketFragmentFD
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from .youtube_live_chat import YoutubeLiveChatReplayFD
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from .youtube_live_chat import YoutubeLiveChatFD
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from .external import (
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get_external_downloader,
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FFmpegFD,
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@ -44,7 +44,8 @@ PROTOCOL_MAP = {
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'mhtml': MhtmlFD,
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'niconico_dmc': NiconicoDmcFD,
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'websocket_frag': WebSocketFragmentFD,
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'youtube_live_chat_replay': YoutubeLiveChatReplayFD,
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'youtube_live_chat': YoutubeLiveChatFD,
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'youtube_live_chat_replay': YoutubeLiveChatFD,
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}
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@ -1,20 +1,23 @@
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from __future__ import division, unicode_literals
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import json
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import time
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from .fragment import FragmentFD
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from ..compat import compat_urllib_error
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from ..utils import (
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try_get,
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dict_get,
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int_or_none,
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RegexNotFoundError,
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)
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from ..extractor.youtube import YoutubeBaseInfoExtractor as YT_BaseIE
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class YoutubeLiveChatReplayFD(FragmentFD):
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""" Downloads YouTube live chat replays fragment by fragment """
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class YoutubeLiveChatFD(FragmentFD):
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""" Downloads YouTube live chats fragment by fragment """
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FD_NAME = 'youtube_live_chat_replay'
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FD_NAME = 'youtube_live_chat'
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def real_download(self, filename, info_dict):
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video_id = info_dict['video_id']
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@ -31,6 +34,8 @@ class YoutubeLiveChatReplayFD(FragmentFD):
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ie = YT_BaseIE(self.ydl)
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start_time = int(time.time() * 1000)
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def dl_fragment(url, data=None, headers=None):
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http_headers = info_dict.get('http_headers', {})
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if headers:
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@ -38,36 +43,70 @@ class YoutubeLiveChatReplayFD(FragmentFD):
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http_headers.update(headers)
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return self._download_fragment(ctx, url, info_dict, http_headers, data)
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def download_and_parse_fragment(url, frag_index, request_data):
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def parse_actions_replay(live_chat_continuation):
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offset = continuation_id = None
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processed_fragment = bytearray()
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for action in live_chat_continuation.get('actions', []):
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if 'replayChatItemAction' in action:
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replay_chat_item_action = action['replayChatItemAction']
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offset = int(replay_chat_item_action['videoOffsetTimeMsec'])
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processed_fragment.extend(
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json.dumps(action, ensure_ascii=False).encode('utf-8') + b'\n')
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if offset is not None:
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continuation_id = try_get(
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live_chat_continuation,
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lambda x: x['continuations'][0]['liveChatReplayContinuationData']['continuation'])
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self._append_fragment(ctx, processed_fragment)
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return continuation_id, offset
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live_offset = 0
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def parse_actions_live(live_chat_continuation):
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nonlocal live_offset
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continuation_id = None
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processed_fragment = bytearray()
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for action in live_chat_continuation.get('actions', []):
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timestamp = self.parse_live_timestamp(action)
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if timestamp is not None:
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live_offset = timestamp - start_time
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# compatibility with replay format
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pseudo_action = {
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'replayChatItemAction': {'actions': [action]},
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'videoOffsetTimeMsec': str(live_offset),
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'isLive': True,
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}
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processed_fragment.extend(
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json.dumps(pseudo_action, ensure_ascii=False).encode('utf-8') + b'\n')
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continuation_data_getters = [
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lambda x: x['continuations'][0]['invalidationContinuationData'],
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lambda x: x['continuations'][0]['timedContinuationData'],
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]
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continuation_data = try_get(live_chat_continuation, continuation_data_getters, dict)
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if continuation_data:
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continuation_id = continuation_data.get('continuation')
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timeout_ms = int_or_none(continuation_data.get('timeoutMs'))
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if timeout_ms is not None:
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time.sleep(timeout_ms / 1000)
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self._append_fragment(ctx, processed_fragment)
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return continuation_id, live_offset
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if info_dict['protocol'] == 'youtube_live_chat_replay':
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parse_actions = parse_actions_replay
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elif info_dict['protocol'] == 'youtube_live_chat':
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parse_actions = parse_actions_live
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def download_and_parse_fragment(url, frag_index, request_data, headers):
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count = 0
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while count <= fragment_retries:
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try:
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success, raw_fragment = dl_fragment(url, request_data, {'content-type': 'application/json'})
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success, raw_fragment = dl_fragment(url, request_data, headers)
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if not success:
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return False, None, None
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try:
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data = ie._extract_yt_initial_data(video_id, raw_fragment.decode('utf-8', 'replace'))
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except RegexNotFoundError:
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data = None
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if not data:
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data = json.loads(raw_fragment)
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data = json.loads(raw_fragment)
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live_chat_continuation = try_get(
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data,
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lambda x: x['continuationContents']['liveChatContinuation'], dict) or {}
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offset = continuation_id = None
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processed_fragment = bytearray()
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for action in live_chat_continuation.get('actions', []):
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if 'replayChatItemAction' in action:
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replay_chat_item_action = action['replayChatItemAction']
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offset = int(replay_chat_item_action['videoOffsetTimeMsec'])
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processed_fragment.extend(
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json.dumps(action, ensure_ascii=False).encode('utf-8') + b'\n')
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if offset is not None:
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continuation_id = try_get(
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live_chat_continuation,
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lambda x: x['continuations'][0]['liveChatReplayContinuationData']['continuation'])
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self._append_fragment(ctx, processed_fragment)
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continuation_id, offset = parse_actions(live_chat_continuation)
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return True, continuation_id, offset
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except compat_urllib_error.HTTPError as err:
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count += 1
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@ -100,7 +139,11 @@ class YoutubeLiveChatReplayFD(FragmentFD):
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innertube_context = try_get(ytcfg, lambda x: x['INNERTUBE_CONTEXT'])
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if not api_key or not innertube_context:
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return False
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url = 'https://www.youtube.com/youtubei/v1/live_chat/get_live_chat_replay?key=' + api_key
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visitor_data = try_get(innertube_context, lambda x: x['client']['visitorData'], str)
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if info_dict['protocol'] == 'youtube_live_chat_replay':
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url = 'https://www.youtube.com/youtubei/v1/live_chat/get_live_chat_replay?key=' + api_key
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elif info_dict['protocol'] == 'youtube_live_chat':
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url = 'https://www.youtube.com/youtubei/v1/live_chat/get_live_chat?key=' + api_key
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frag_index = offset = 0
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while continuation_id is not None:
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@ -111,8 +154,11 @@ class YoutubeLiveChatReplayFD(FragmentFD):
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}
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if frag_index > 1:
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request_data['currentPlayerState'] = {'playerOffsetMs': str(max(offset - 5000, 0))}
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headers = ie._generate_api_headers(ytcfg, visitor_data=visitor_data)
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headers.update({'content-type': 'application/json'})
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fragment_request_data = json.dumps(request_data, ensure_ascii=False).encode('utf-8') + b'\n'
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success, continuation_id, offset = download_and_parse_fragment(
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url, frag_index, json.dumps(request_data, ensure_ascii=False).encode('utf-8') + b'\n')
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url, frag_index, fragment_request_data, headers)
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if not success:
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return False
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if test:
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@ -120,3 +166,39 @@ class YoutubeLiveChatReplayFD(FragmentFD):
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self._finish_frag_download(ctx)
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return True
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@staticmethod
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def parse_live_timestamp(action):
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action_content = dict_get(
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action,
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['addChatItemAction', 'addLiveChatTickerItemAction', 'addBannerToLiveChatCommand'])
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if not isinstance(action_content, dict):
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return None
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item = dict_get(action_content, ['item', 'bannerRenderer'])
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if not isinstance(item, dict):
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return None
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renderer = dict_get(item, [
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# text
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'liveChatTextMessageRenderer', 'liveChatPaidMessageRenderer',
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'liveChatMembershipItemRenderer', 'liveChatPaidStickerRenderer',
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# ticker
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'liveChatTickerPaidMessageItemRenderer',
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'liveChatTickerSponsorItemRenderer',
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# banner
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'liveChatBannerRenderer',
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])
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if not isinstance(renderer, dict):
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return None
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parent_item_getters = [
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lambda x: x['showItemEndpoint']['showLiveChatItemEndpoint']['renderer'],
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lambda x: x['contents'],
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]
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parent_item = try_get(renderer, parent_item_getters, dict)
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if parent_item:
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renderer = dict_get(parent_item, [
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'liveChatTextMessageRenderer', 'liveChatPaidMessageRenderer',
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'liveChatMembershipItemRenderer', 'liveChatPaidStickerRenderer',
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])
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if not isinstance(renderer, dict):
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return None
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return int_or_none(renderer.get('timestampUsec'), 1000)
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@ -2339,18 +2339,17 @@ class YoutubeIE(YoutubeBaseInfoExtractor):
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initial_data = self._call_api(
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'next', {'videoId': video_id}, video_id, fatal=False, api_key=self._extract_api_key(ytcfg))
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if not is_live:
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try:
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# This will error if there is no livechat
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initial_data['contents']['twoColumnWatchNextResults']['conversationBar']['liveChatRenderer']['continuations'][0]['reloadContinuationData']['continuation']
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info['subtitles']['live_chat'] = [{
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'url': 'https://www.youtube.com/watch?v=%s' % video_id, # url is needed to set cookies
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'video_id': video_id,
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'ext': 'json',
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'protocol': 'youtube_live_chat_replay',
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}]
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except (KeyError, IndexError, TypeError):
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pass
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try:
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# This will error if there is no livechat
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initial_data['contents']['twoColumnWatchNextResults']['conversationBar']['liveChatRenderer']['continuations'][0]['reloadContinuationData']['continuation']
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info['subtitles']['live_chat'] = [{
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'url': 'https://www.youtube.com/watch?v=%s' % video_id, # url is needed to set cookies
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'video_id': video_id,
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'ext': 'json',
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'protocol': 'youtube_live_chat' if is_live else 'youtube_live_chat_replay',
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}]
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except (KeyError, IndexError, TypeError):
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pass
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if initial_data:
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chapters = self._extract_chapters_from_json(
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