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README.md
12
README.md
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@ -1553,9 +1553,9 @@ ## Sorting Formats
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All fields, unless specified otherwise, are sorted in descending order. To reverse this, prefix the field with a `+`. E.g. `+res` prefers format with the smallest resolution. Additionally, you can suffix a preferred value for the fields, separated by a `:`. E.g. `res:720` prefers larger videos, but no larger than 720p and the smallest video if there are no videos less than 720p. For `codec` and `ext`, you can provide two preferred values, the first for video and the second for audio. E.g. `+codec:avc:m4a` (equivalent to `+vcodec:avc,+acodec:m4a`) sets the video codec preference to `h264` > `h265` > `vp9` > `vp9.2` > `av01` > `vp8` > `h263` > `theora` and audio codec preference to `mp4a` > `aac` > `vorbis` > `opus` > `mp3` > `ac3` > `dts`. You can also make the sorting prefer the nearest values to the provided by using `~` as the delimiter. E.g. `filesize~1G` prefers the format with filesize closest to 1 GiB.
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The fields `hasvid` and `ie_pref` are always given highest priority in sorting, irrespective of the user-defined order. This behavior can be changed by using `--format-sort-force`. Apart from these, the default order used is: `lang,quality,res,fps,hdr:12,vcodec:vp9.2,channels,acodec,size,br,asr,proto,ext,hasaud,source,id`. The extractors may override this default order, but they cannot override the user-provided order.
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The fields `hasvid` and `ie_pref` are always given highest priority in sorting, irrespective of the user-defined order. This behavior can be changed by using `--format-sort-force`. Apart from these, the default order used is: `lang,quality,res,fps,hdr:12,vcodec,channels,acodec,size,br,asr,proto,ext,hasaud,source,id`. The extractors may override this default order, but they cannot override the user-provided order.
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Note that the default has `vcodec:vp9.2`; i.e. `av1` is not preferred. Similarly, the default for hdr is `hdr:12`; i.e. Dolby Vision is not preferred. These choices are made since DV and AV1 formats are not yet fully compatible with most devices. This may be changed in the future as more devices become capable of smoothly playing back these formats.
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Note that the default for hdr is `hdr:12`; i.e. Dolby Vision is not preferred. This choice was made since DV formats are not yet fully compatible with most devices. This may be changed in the future.
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If your format selector is `worst`, the last item is selected after sorting. This means it will select the format that is worst in all respects. Most of the time, what you actually want is the video with the smallest filesize instead. So it is generally better to use `-f best -S +size,+br,+res,+fps`.
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@ -2205,7 +2205,7 @@ ### Differences in default behavior
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* `avconv` is not supported as an alternative to `ffmpeg`
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* yt-dlp stores config files in slightly different locations to youtube-dl. See [CONFIGURATION](#configuration) for a list of correct locations
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* The default [output template](#output-template) is `%(title)s [%(id)s].%(ext)s`. There is no real reason for this change. This was changed before yt-dlp was ever made public and now there are no plans to change it back to `%(title)s-%(id)s.%(ext)s`. Instead, you may use `--compat-options filename`
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* The default [format sorting](#sorting-formats) is different from youtube-dl and prefers higher resolution and better codecs rather than higher bitrates. You can use the `--format-sort` option to change this to any order you prefer, or use `--compat-options format-sort` to use youtube-dl's sorting order
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* The default [format sorting](#sorting-formats) is different from youtube-dl and prefers higher resolution and better codecs rather than higher bitrates. You can use the `--format-sort` option to change this to any order you prefer, or use `--compat-options format-sort` to use youtube-dl's sorting order. Older versions of yt-dlp preferred VP9 due to its broader compatibility; you can use `--compat-options prefer-vp9-sort` to revert to that format sorting preference. These two compat options cannot be used together
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* The default format selector is `bv*+ba/b`. This means that if a combined video + audio format that is better than the best video-only format is found, the former will be preferred. Use `-f bv+ba/b` or `--compat-options format-spec` to revert this
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* Unlike youtube-dlc, yt-dlp does not allow merging multiple audio/video streams into one file by default (since this conflicts with the use of `-f bv*+ba`). If needed, this feature must be enabled using `--audio-multistreams` and `--video-multistreams`. You can also use `--compat-options multistreams` to enable both
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* `--no-abort-on-error` is enabled by default. Use `--abort-on-error` or `--compat-options abort-on-error` to abort on errors instead
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@ -2234,11 +2234,11 @@ ### Differences in default behavior
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For ease of use, a few more compat options are available:
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* `--compat-options all`: Use all compat options (**Do NOT use this!**)
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* `--compat-options youtube-dl`: Same as `--compat-options all,-multistreams,-playlist-match-filter,-manifest-filesize-approx,-allow-unsafe-ext`
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* `--compat-options youtube-dlc`: Same as `--compat-options all,-no-live-chat,-no-youtube-channel-redirect,-playlist-match-filter,-manifest-filesize-approx,-allow-unsafe-ext`
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* `--compat-options youtube-dl`: Same as `--compat-options all,-multistreams,-playlist-match-filter,-manifest-filesize-approx,-allow-unsafe-ext,-prefer-vp9-sort`
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* `--compat-options youtube-dlc`: Same as `--compat-options all,-no-live-chat,-no-youtube-channel-redirect,-playlist-match-filter,-manifest-filesize-approx,-allow-unsafe-ext,-prefer-vp9-sort`
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* `--compat-options 2021`: Same as `--compat-options 2022,no-certifi,filename-sanitization,no-youtube-prefer-utc-upload-date`
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* `--compat-options 2022`: Same as `--compat-options 2023,playlist-match-filter,no-external-downloader-progress,prefer-legacy-http-handler,manifest-filesize-approx`
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* `--compat-options 2023`: Currently does nothing. Use this to enable all future compat options
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* `--compat-options 2023`: Same as `--compat-options prefer-vp9-sort`. Use this to enable all future compat options
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The following compat options restore vulnerable behavior from before security patches:
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@ -470,7 +470,7 @@ class YoutubeDL:
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The following options do not work when used through the API:
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filename, abort-on-error, multistreams, no-live-chat,
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format-sort, no-clean-infojson, no-playlist-metafiles,
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no-keep-subs, no-attach-info-json, allow-unsafe-ext.
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no-keep-subs, no-attach-info-json, allow-unsafe-ext, prefer-vp9-sort.
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Refer __init__.py for their implementation
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progress_template: Dictionary of templates for progress outputs.
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Allowed keys are 'download', 'postprocess',
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@ -159,6 +159,9 @@ def set_default_compat(compat_name, opt_name, default=True, remove_compat=True):
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opts.embed_infojson = False
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if 'format-sort' in opts.compat_opts:
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opts.format_sort.extend(FormatSorter.ytdl_default)
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elif 'prefer-vp9-sort' in opts.compat_opts:
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opts.format_sort.extend(FormatSorter._prefer_vp9_sort)
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_video_multistreams_set = set_default_compat('multistreams', 'allow_multiple_video_streams', False, remove_compat=False)
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_audio_multistreams_set = set_default_compat('multistreams', 'allow_multiple_audio_streams', False, remove_compat=False)
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if _video_multistreams_set is False and _audio_multistreams_set is False:
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@ -4777,7 +4777,7 @@ def is_bad_format(fmt):
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'live_status': live_status,
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'release_timestamp': live_start_time,
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'_format_sort_fields': ( # source_preference is lower for potentially damaged formats
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'quality', 'res', 'fps', 'hdr:12', 'source', 'vcodec:vp9.2', 'channels', 'acodec', 'lang', 'proto'),
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'quality', 'res', 'fps', 'hdr:12', 'source', 'vcodec', 'channels', 'acodec', 'lang', 'proto'),
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}
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subtitles = {}
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@ -7858,7 +7858,7 @@ def _real_extract(self, url):
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'section_start': int(clip_data['startTimeMs']) / 1000,
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'section_end': int(clip_data['endTimeMs']) / 1000,
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'_format_sort_fields': ( # https protocol is prioritized for ffmpeg compatibility
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'proto:https', 'quality', 'res', 'fps', 'hdr:12', 'source', 'vcodec:vp9.2', 'channels', 'acodec', 'lang'),
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'proto:https', 'quality', 'res', 'fps', 'hdr:12', 'source', 'vcodec', 'channels', 'acodec', 'lang'),
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}
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@ -483,13 +483,13 @@ def _alias_callback(option, opt_str, value, parser, opts, nargs):
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'no-attach-info-json', 'embed-thumbnail-atomicparsley', 'no-external-downloader-progress',
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'embed-metadata', 'seperate-video-versions', 'no-clean-infojson', 'no-keep-subs', 'no-certifi',
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'no-youtube-channel-redirect', 'no-youtube-unavailable-videos', 'no-youtube-prefer-utc-upload-date',
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'prefer-legacy-http-handler', 'manifest-filesize-approx', 'allow-unsafe-ext',
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'prefer-legacy-http-handler', 'manifest-filesize-approx', 'allow-unsafe-ext', 'prefer-vp9-sort',
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}, 'aliases': {
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'youtube-dl': ['all', '-multistreams', '-playlist-match-filter', '-manifest-filesize-approx', '-allow-unsafe-ext'],
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'youtube-dlc': ['all', '-no-youtube-channel-redirect', '-no-live-chat', '-playlist-match-filter', '-manifest-filesize-approx', '-allow-unsafe-ext'],
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'youtube-dl': ['all', '-multistreams', '-playlist-match-filter', '-manifest-filesize-approx', '-allow-unsafe-ext', '-prefer-vp9-sort'],
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'youtube-dlc': ['all', '-no-youtube-channel-redirect', '-no-live-chat', '-playlist-match-filter', '-manifest-filesize-approx', '-allow-unsafe-ext', '-prefer-vp9-sort'],
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'2021': ['2022', 'no-certifi', 'filename-sanitization'],
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'2022': ['2023', 'no-external-downloader-progress', 'playlist-match-filter', 'prefer-legacy-http-handler', 'manifest-filesize-approx'],
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'2023': [],
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'2023': ['prefer-vp9-sort'],
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},
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}, help=(
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'Options that can help keep compatibility with youtube-dl or youtube-dlc '
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@ -5337,8 +5337,11 @@ class FormatSorter:
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regex = r' *((?P<reverse>\+)?(?P<field>[a-zA-Z0-9_]+)((?P<separator>[~:])(?P<limit>.*?))?)? *$'
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default = ('hidden', 'aud_or_vid', 'hasvid', 'ie_pref', 'lang', 'quality',
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'res', 'fps', 'hdr:12', 'vcodec:vp9.2', 'channels', 'acodec',
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'res', 'fps', 'hdr:12', 'vcodec', 'channels', 'acodec',
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'size', 'br', 'asr', 'proto', 'ext', 'hasaud', 'source', 'id') # These must not be aliases
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_prefer_vp9_sort = ('hidden', 'aud_or_vid', 'hasvid', 'ie_pref', 'lang', 'quality',
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'res', 'fps', 'hdr:12', 'vcodec:vp9.2', 'channels', 'acodec',
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'size', 'br', 'asr', 'proto', 'ext', 'hasaud', 'source', 'id')
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ytdl_default = ('hasaud', 'lang', 'quality', 'tbr', 'filesize', 'vbr',
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'height', 'width', 'proto', 'vext', 'abr', 'aext',
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'fps', 'fs_approx', 'source', 'id')
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