* Split `__init__` code into multiple functions
* Clean up validation code by grouping similar types of options
* Expose `parse_options` to third parties
* 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
In youtube-dl, `-i` ignores both download and post-processing error, and
treats the download as successful even if the post-processor fails.
yt-dlp used to skip the entire video on either error and there was no
option to ignore the post-processing errors like youtube-dl does.
By splitting the option into two, now either just the download errors
(--no-abort-on-error, default on CLI) or all errors (--ignore-errors)
can be ignored as per the users' needs
Closes#893
* [docs] Fix typo
* Do not enable `sponskrub` by default
* Fix `--force-keyframes-at-cuts`
* Don't embed subtitles if the video has been cut. Previously, running `--remove-chapters` with `--embed-subs` multiple times caused repeated cuts and out-of-sync subtitles
* Store `_real_duration` to prevent running ffprobe multiple times
SponsorBlock options:
* The fetched sponsor sections are written to infojson
* `--sponsorblock-remove` removes specified chapters from file
* `--sponsorblock-mark` marks the specified sponsor sections as chapters
* `--sponsorblock-chapter-title` to specify sponsor chapter template
* `--sponsorblock-api` to use a different API
Related improvements:
* Split `--embed-chapters` from `--embed-metadata`
* Add `--remove-chapters` to remove arbitrary chapters
* Add `--force-keyframes-at-cuts` for more accurate cuts when removing and splitting chapters
Deprecates all `--sponskrub` options
Authored by: nihil-admirari, pukkandan
