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[dash,youtube] Download live from start to end (#888)

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* Add option `--live-from-start` to enable downloading live videos from start
* Add key `is_from_start` in formats to identify formats (of live videos) that downloads from start
* [dash] Create protocol `http_dash_segments_generator` that allows a function to be passed instead of fragments
* [fragment] Allow multiple live dash formats to download simultaneously
* [youtube] Implement fragment re-fetching for the live dash formats
* [youtube] Re-extract dash manifest every 5 hours (manifest expires in 6hrs)
* [postprocessor/ffmpeg] Add `FFmpegFixupDuplicateMoovPP` to fixup duplicated moov atoms

Known issue: Ctrl+C doesn't work on Windows when downloading multiple formats

Closes #1521
Authored by: nao20010128nao, pukkandan
This commit is contained in:
The Hatsune Daishi
2021-12-20 15:06:46 +09:00
committed by GitHub
parent c031b0414c
commit adbc4ec4bb
15 changed files with 355 additions and 100 deletions
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8
yt_dlp/options.py
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@@ -258,6 +258,14 @@ def parseOpts(overrideArguments=None):
'--no-flat-playlist',
action='store_false', dest='extract_flat',
help='Extract the videos of a playlist')
general.add_option(
'--live-from-start',
action='store_true', dest='live_from_start',
help='Download livestreams from the start. Currently only supported for YouTube')
general.add_option(
'--no-live-from-start',
action='store_false', dest='live_from_start',
help='Download livestreams from the current time (default)')
general.add_option(
'--wait-for-video',
dest='wait_for_video', metavar='MIN[-MAX]', default=None,