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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
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The Hatsune Daishi 2021-12-20 15:06:46 +09:00 • committed by GitHub
parent c031b0414c
commit adbc4ec4bb
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15 changed files with 355 additions and 100 deletions
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yt_dlp/__init__.py
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@ -745,6 +745,7 @@ def _real_main(argv=None):
'youtube_include_hls_manifest': opts.youtube_include_hls_manifest,
'encoding': opts.encoding,
'extract_flat': opts.extract_flat,
'live_from_start': opts.live_from_start,
'wait_for_video': opts.wait_for_video,
'mark_watched': opts.mark_watched,
'merge_output_format': opts.merge_output_format,