unshackle/docs/reference/configuration/download.md

Download & processing

dl

• Type: dict  ·  Default: {}

Persistent defaults for the dl command. The block is used as Click's default_map, so any dl flag can be given a default here. See Downloading and the CLI Reference for what each flag does.

Key naming. A key is the flag's long name with dashes replaced by underscores (--best-available → best_available, --sub-format → sub_format). A few keys are named after the flag's internal destination rather than its visible name; set these exact keys:

Flag	Config key
-r / --range	range
--list	list
--tmdb	tmdb_id
--imdb	imdb_id
--animeapi	animeapi_id
-naa / --noatmos	no_atmos
-o / --output	output_dir
--cdm-only / --vaults-only	cdm_only

Precedence (highest first): an explicit CLI flag → a per-service services.<TAG>.dl override → this global dl: block → the built-in default. In other words, config only fills in options you did not set on the command line.

Common keys (a useful subset; every dl flag works):

Key	Type	Default	Sets
lang	list	["orig"]	Video/audio language(s); orig = original language.
a_lang / v_lang	list	[]	Audio- / video-only language override.
s_lang	list	["all"]	Subtitle language(s).
quality	list	[] (best)	Resolution(s), e.g. [1080].
vcodec	list	[] (any)	Video codec(s), e.g. [H265].
acodec	list	[] (any)	Audio codec(s), e.g. [EC3].
range	list	["SDR"]	Colour range(s): SDR, HLG, HDR10, HDR10P, DV, HYBRID.
channels	float	(unset)	Audio channels, e.g. 6 for 5.1.
sub_format	str	(unset)	Convert subtitles to this format (srt, vtt, original, ...).
forced_subs	bool	false	Include forced subtitle tracks.
forced_s_lang	list	[]	Forced subtitle language(s); implies forced_subs.
no_subs / no_audio / no_chapters	bool	false	Skip that track type.
downloads	int	1	Tracks downloaded concurrently.
workers	int	(downloader default)	Threads per track.
speed_limit	str	(unlimited)	Total download speed cap across all downloads combined, e.g. 500k, 5M, 1.5G or plain bytes/sec. Values are bytes, not bits (5M = 5.0 MB/s).
slow	str	(unset)	Inter-title delay, e.g. "20-40".
best_available	bool	false	Fall back to best quality if the request is unavailable.
proxy	str	(unset)	Default proxy URI or 2-letter country.
no_folder	bool	false	Do not create a per-title folder.

dl:
  lang: [en]
  quality: [1080]
  range: [HDR10]
  vcodec: [H265]
  sub_format: srt
  downloads: 2

!!! note "Per-service overrides" A dl block nested under a service in services takes the same keys and applies to that service only.

```yaml
dl:
  lang: [en]
services:
  EXAMPLE1:
    dl:
      lang: [en, ja]
      range: [DV]
```

!!! note "serve uses these same keys" The serve block accepts most of the same dl option keys at its top level to set server-wide download defaults for every request it handles. Keys the API does not know are ignored there (speed_limit, for example; serve has its own global_speed_limit).

subtitle

• Type: dict  ·  Default: {}

Subtitle handling: SDH stripping, format conversion, and whether subtitles are muxed in or written as sidecar files. See Subtitles for the full guide.

Sub-key	Type	Default	Description
strip_sdh	bool	true	Strip SDH/CC cues (hearing-impaired annotations) into a clean track.
sdh_method	str	"auto"	SDH-stripping backend to use.
preserve_formatting	bool	true	Keep styling/positioning when converting or stripping.
convert_before_strip	bool	true	Convert to the working format before stripping SDH.
conversion_method	str	"auto"	Subtitle conversion backend.
output_mode	str	"mux"	mux embeds subtitles in the MKV; sidecar writes separate files; both writes sidecars and still muxes.
sidecar_format	str	"srt"	Format for sidecar files when output_mode is sidecar or both.
type_priority	list	(unset)	Ordered ranking of subtitle types (forced, normal, sdh; CC counts as SDH). Types you leave out fall to the end.
group_by	str	"type"	Which key groups the subtitle tracks. type puts all forced tracks together, then all normal, then all SDH. language keeps each language next to its own variants.
language_priority	list	(unset)	Languages to sort to the top, in the order you give. The rest keep the default order: original language first, then alphabetical. Nothing is removed.

subtitle:
  strip_sdh: true
  output_mode: sidecar
  sidecar_format: srt

!!! note "group_by track order" | group_by | Result | |---|---| | type | Danish, Finnish, French, … Danish SDH, Finnish SDH, French SDH | | language | Danish, Danish SDH, Finnish, Finnish SDH, French, French SDH |

`type_priority` still sets the order of the variants, so with `group_by: language` it
controls the order inside each language.

!!! note "language_priority sorts languages, it does not select them" yaml subtitle: group_by: language language_priority: [en, es, fr]

| | Result for an English title |
|---|---|
| Default | English, Arabic, Bulgarian, Spanish, French, Japanese |
| With the list above | English, Spanish, French, Arabic, Bulgarian, Japanese |

Nothing is removed, unlike `-sl`, which drops every subtitle language it does not name.

Use `orig` in the list for the title's original language. A base tag also covers its
regional forms, so `en` sorts `en-US` and `en-GB`, but `zh` does **not** cover
`zh-Hant`, which you must name. The sort ignores entries that match no track, and it
ignores entries that are not valid language tags.

`--exact-lang` applies here too: with it, `en` sorts only `en`, and `en-US` falls to
the alphabetical tail with the rest. Name each tag you want when you use that flag.

!!! note "type_priority picks the default subtitle only with muxing.default_language" At mux time the default flag goes to every forced subtitle whose language matches the first audio track, so a full dialogue track never becomes default on its own. type_priority alone does not change that. Name a subtitle language in muxing.default_language and the first track in that language gets the flag instead, which is where type_priority decides which track that is:

```yaml
muxing:
  default_language:
    subtitle: en
subtitle:
  type_priority: [normal, sdh, forced]
```

audio

• Type: dict  ·  Default: {}

Audio handling options. The most notable sub-key is codec_priority, an ordered list of audio codecs used to break ties in track selection. language_priority is an ordered list of languages that sort to the top of the audio tracks.

audio:
  codec_priority:
    - EAC3
    - AC3
  language_priority:
    - orig
    - en

!!! note "codec_priority is a soft priority: nothing is dropped" codec_priority outranks bitrate: any listed codec sorts above every unlisted one, and among listed codecs the list order decides. Bitrate order survives only within a single codec rank. Nothing is ever removed. Two higher-level rules still override it: Atmos tracks always take precedence over codec_priority, and audio-description tracks are always forced to the end regardless of it. When codec_priority is unset, tracks sort by bitrate alone, with those same Atmos/descriptive rules still applied.

muxing

• Type: dict  ·  Default: {}

Matroska (MKV) muxing options.

Sub-key	Type	Default	Description
set_title	bool	true	Write a human-readable title into the MKV container.
default_language	dict	{}	Force which language is flagged default per track type, e.g. {audio: en, subtitle: en}.
merge_audio	bool	true	Merge all audio into one file. --split-audio on the CLI flips this off.
merge_video	bool	false	Merge video tracks that share height, range, and codec into one file, so only language varies inside a file. --merge-video on the CLI flips this on.

muxing:
  set_title: true
  default_language:
    audio: en
    subtitle: en

language_tags

• Type: dict  ·  Default: {}

Language-tag remapping and the rule engine behind the {lang_tag} filename variable. When a rules list is present, each rule is evaluated in order and the first match's tag is used. A rule may test:

Condition	Meaning
audio	Matches against the audio track languages.
subs_contain	At least one subtitle language matches.
subs_contain_all	Every listed language must be present (scalar or list).

language_tags:
  rules:
    - audio: [ja]
      subs_contain: [en]
      tag: "SUBBED"

dual_multi_mode

• Type: str  ·  Default: strict

Rule set for the {dual}, {multi}, and {dubbed} filename variables.

=== "strict (default)"

| Variable | Set when |
|----------|----------|
| `{dual}` | Exactly two audio languages **and one is the title's original language**. |
| `{multi}` | Three or more audio languages, even without the original. |
| `{dubbed}` | A single audio language that is not the title's original language (requires a known original). |

=== "count (legacy)"

| Variable | Set when |
|----------|----------|
| `{dual}` | Exactly two audio languages (original language ignored). |
| `{multi}` | Three or more audio languages. |
| `{dubbed}` | Never set. |

dual_multi_mode: strict

!!! note "Dialects count as one language" Regional variants of the same base language (e.g. en-US and en-GB) collapse to a single language in both modes, so they never trigger {dual} on their own.