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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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7
yt_dlp/extractor/common.py
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@ -163,9 +163,8 @@ class InfoExtractor(object):
* filesize_approx An estimate for the number of bytes
* player_url SWF Player URL (used for rtmpdump).
* protocol The protocol that will be used for the actual
download, lower-case.
"http", "https", "rtsp", "rtmp", "rtmp_ffmpeg", "rtmpe",
"m3u8", "m3u8_native" or "http_dash_segments".
download, lower-case. One of "http", "https" or
one of the protocols defined in downloader.PROTOCOL_MAP
* fragment_base_url
Base URL for fragments. Each fragment's path
value (if present) will be relative to
@ -181,6 +180,8 @@ class InfoExtractor(object):
fragment_base_url
* "duration" (optional, int or float)
* "filesize" (optional, int)
* is_from_start Is a live format that can be downloaded
from the start. Boolean
* preference Order number of this format. If this field is
present and not None, the formats get sorted
by this field, regardless of all other values.