Merge pull request #944 from jacinli/codex/fix-subscription-enabled-parsing

Fix string boolean parsing for subscription enabled updates

.vscode/launch.json

@@ -13,12 +13,16 @@
                 "env": {
                     "DOWNLOAD_DIR": "${env:USERPROFILE}/Downloads",
                     "STATE_DIR": "${env:TEMP}",
+                    "ALLOW_YTDL_OPTIONS_OVERRIDES": "true",
+                    "YTDL_OPTIONS_PRESETS": "{\"sponsorblock\": {\"postprocessors\": [{\"key\": \"SponsorBlock\", \"categories\": [\"sponsor\", \"selfpromo\", \"interaction\"]}, {\"key\": \"ModifyChapters\", \"remove_sponsor_segments\": [\"sponsor\", \"selfpromo\", \"interaction\"]}]}, \"embed-subs\": {\"writesubtitles\": true, \"writeautomaticsub\": true, \"subtitleslangs\": [\"en\", \"de\"], \"postprocessors\": [{\"key\": \"FFmpegEmbedSubtitle\"}]}, \"limit-rate\": {\"ratelimit\": 5000000}}",
                 }
             },
             "osx": {
                 "env": {
                     "DOWNLOAD_DIR": "${env:HOME}/Downloads",
                     "STATE_DIR": "${env:TMPDIR}",
+                    "ALLOW_YTDL_OPTIONS_OVERRIDES": "true",
+                    "YTDL_OPTIONS_PRESETS": "{\"sponsorblock\": {\"postprocessors\": [{\"key\": \"SponsorBlock\", \"categories\": [\"sponsor\", \"selfpromo\", \"interaction\"]}, {\"key\": \"ModifyChapters\", \"remove_sponsor_segments\": [\"sponsor\", \"selfpromo\", \"interaction\"]}]}, \"embed-subs\": {\"writesubtitles\": true, \"writeautomaticsub\": true, \"subtitleslangs\": [\"en\", \"de\"], \"postprocessors\": [{\"key\": \"FFmpegEmbedSubtitle\"}]}, \"limit-rate\": {\"ratelimit\": 5000000}}",
                 }
             },
             "console": "integratedTerminal"

README.md

@@ -66,8 +66,11 @@ Certain values can be set via environment variables, using the `-e` parameter on
 * __OUTPUT_TEMPLATE_CHAPTER__: The template for the filenames of the downloaded videos when split into chapters via postprocessors. Defaults to `%(title)s - %(section_number)s %(section_title)s.%(ext)s`.
 * __OUTPUT_TEMPLATE_PLAYLIST__: The template for the filenames of the downloaded videos when downloaded as a playlist. Defaults to `%(playlist_title)s/%(title)s.%(ext)s`. Set to empty to use `OUTPUT_TEMPLATE` instead.
 * __OUTPUT_TEMPLATE_CHANNEL__: The template for the filenames of the downloaded videos when downloaded as a channel. Defaults to `%(channel)s/%(title)s.%(ext)s`. Set to empty to use `OUTPUT_TEMPLATE` instead.
-* __YTDL_OPTIONS__: Additional options to pass to yt-dlp in JSON format. [See available options here](https://github.com/yt-dlp/yt-dlp/blob/master/yt_dlp/YoutubeDL.py#L222). They roughly correspond to command-line options, though some do not have exact equivalents here. For example, `--recode-video` has to be specified via `postprocessors`. Also note that dashes are replaced with underscores. You may find [this script](https://github.com/yt-dlp/yt-dlp/blob/master/devscripts/cli_to_api.py) helpful for converting from command-line options to `YTDL_OPTIONS`.
-* __YTDL_OPTIONS_FILE__: A path to a JSON file that will be loaded and used for populating `YTDL_OPTIONS` above. Please note that if both `YTDL_OPTIONS_FILE` and `YTDL_OPTIONS` are specified, the options in `YTDL_OPTIONS` take precedence. The file will be monitored for changes and reloaded automatically when changes are detected.
+* __YTDL_OPTIONS__: Additional options to pass to yt-dlp, as a JSON object. See [Configuring yt-dlp options](#%EF%B8%8F-configuring-yt-dlp-options) for details, examples, and available options reference.
+* __YTDL_OPTIONS_FILE__: Path to a JSON file containing yt-dlp options. Monitored and reloaded automatically on changes. See [Configuring yt-dlp options](#%EF%B8%8F-configuring-yt-dlp-options).
+* __YTDL_OPTIONS_PRESETS__: Named bundles of yt-dlp options, selectable per download in the UI. See [Configuring yt-dlp options](#%EF%B8%8F-configuring-yt-dlp-options) for format and examples.
+* __YTDL_OPTIONS_PRESETS_FILE__: Path to a JSON file containing presets. Monitored and reloaded automatically on changes. See [Configuring yt-dlp options](#%EF%B8%8F-configuring-yt-dlp-options).
+* __ALLOW_YTDL_OPTIONS_OVERRIDES__: Whether to show a free-text field in the UI for per-download yt-dlp option overrides. Defaults to `false`. See [Configuring yt-dlp options](#%EF%B8%8F-configuring-yt-dlp-options) for details and security considerations.
 
 ### 🌐 Web Server & URLs
 
@@ -90,6 +93,120 @@ Certain values can be set via environment variables, using the `-e` parameter on
 * __LOGLEVEL__: Log level, can be set to `DEBUG`, `INFO`, `WARNING`, `ERROR`, `CRITICAL`, or `NONE`. Defaults to `INFO`. 
 * __ENABLE_ACCESSLOG__: Whether to enable access log. Defaults to `false`.
 
+## 🎛️ Configuring yt-dlp options
+
+MeTube lets you customize how [yt-dlp](https://github.com/yt-dlp/yt-dlp) behaves at three levels, from broadest to most specific:
+
+1. **Global options** — apply to every download by default.
+2. **Presets** — named bundles of options that users can pick per download from the UI.
+3. **Per-download overrides** — free-form options entered in the UI for a single download.
+
+When a download starts, these layers are combined in order. If the same option appears in more than one layer, the more specific one wins: per-download overrides beat presets, and presets beat global options.
+
+### Option format
+
+yt-dlp options in MeTube are expressed as JSON objects. The keys are yt-dlp API option names, which roughly correspond to command-line flags with dashes replaced by underscores. For example, the command-line flag `--embed-thumbnail` becomes `"embed_thumbnail": true` in JSON.
+
+> **Tip:** Some command-line flags don't have a direct single-key equivalent — for instance, `--recode-video` must be expressed via `"postprocessors"`. A full list of available API options can be found [in the yt-dlp source](https://github.com/yt-dlp/yt-dlp/blob/master/yt_dlp/YoutubeDL.py#L224), and [this conversion script](https://github.com/yt-dlp/yt-dlp/blob/master/devscripts/cli_to_api.py) can help translate command-line flags to their API equivalents.
+
+### Global options
+
+Global options form the baseline for every download. There are two ways to define them, and you can use either or both:
+
+**Inline via environment variable** (`YTDL_OPTIONS`) — pass a JSON object directly:
+
+```yaml
+environment:
+  - 'YTDL_OPTIONS={"writesubtitles": true, "subtitleslangs": ["en", "de"], "updatetime": false, "embed_thumbnail": true}'
+```
+
+**Via a JSON file** (`YTDL_OPTIONS_FILE`) — mount a file into the container and point to it:
+
+```yaml
+volumes:
+  - /path/to/ytdl-options.json:/config/ytdl-options.json
+environment:
+  - YTDL_OPTIONS_FILE=/config/ytdl-options.json
+```
+
+where `ytdl-options.json` contains:
+
+```json
+{
+  "writesubtitles": true,
+  "subtitleslangs": ["en", "de"],
+  "updatetime": false,
+  "embed_thumbnail": true
+}
+```
+
+The file is monitored for changes and reloaded automatically — no container restart needed. If you use both methods and they define the same key, the **file takes precedence**.
+
+### Presets
+
+Presets let you define named bundles of options that appear in the web UI under **Advanced Options** as "Option Presets". Users can select one or more presets per download, making it easy to apply common option combinations without editing global settings.
+
+Like global options, presets can be set inline or via a file:
+
+* `YTDL_OPTIONS_PRESETS` — a JSON object where each key is a preset name and its value is a set of yt-dlp options.
+* `YTDL_OPTIONS_PRESETS_FILE` — path to a JSON file containing presets, monitored and reloaded on changes.
+
+If both are used and they define a preset with the same name, the **file's version takes precedence**.
+
+**Example** — a presets file defining three presets:
+
+```json
+{
+  "sponsorblock": {
+    "postprocessors": [
+      { "key": "SponsorBlock", "categories": ["sponsor", "selfpromo", "interaction"] },
+      { "key": "ModifyChapters", "remove_sponsor_segments": ["sponsor", "selfpromo", "interaction"] }
+    ]
+  },
+  "embed-subs": {
+    "writesubtitles": true,
+    "writeautomaticsub": true,
+    "subtitleslangs": ["en", "de"],
+    "postprocessors": [{ "key": "FFmpegEmbedSubtitle" }]
+  },
+  "limit-rate": {
+    "ratelimit": 5000000
+  }
+}
+```
+
+This makes three presets available in the UI:
+* **sponsorblock** — strips sponsor, self-promo, and interaction segments from videos.
+* **embed-subs** — downloads English and German subtitles and embeds them into the video file.
+* **limit-rate** — caps download speed to ~5 MB/s.
+
+When multiple presets are selected for a download, they are applied in order. If two presets set the same option, the later one wins.
+
+### Per-download overrides
+
+For one-off tweaks, MeTube can expose a free-text JSON field in the UI ("Custom yt-dlp Options") where users type yt-dlp options that apply only to that single download. This is disabled by default:
+
+```yaml
+environment:
+  - ALLOW_YTDL_OPTIONS_OVERRIDES=true
+```
+
+Once enabled, the field appears under **Advanced Options**. Any options entered there take the highest priority, overriding both global options and selected presets.
+
+> **⚠️ Security note:** Enabling this allows arbitrary yt-dlp API options to be supplied by anyone with access to the UI. Depending on the options used, this may enable arbitrary command execution inside the container. Enable only in trusted environments.
+
+### How the layers combine
+
+When a download starts, the final set of yt-dlp options is built in this order:
+
+1. Start with **global options** (`YTDL_OPTIONS` / `YTDL_OPTIONS_FILE`).
+2. Apply each selected **preset** in order (later presets overwrite earlier ones for conflicting keys).
+3. Apply any **per-download overrides** on top (overwrite everything else for conflicting keys).
+
+**Example:** Suppose your global options set `"writesubtitles": false`, but you select a preset that sets `"writesubtitles": true`. Subtitles will be written for that download because the preset overrides the global setting. If you additionally enter `{"writesubtitles": false}` in the per-download overrides field, that value wins and subtitles will not be written.
+
+### Configuration cookbooks
+
 The project's Wiki contains examples of useful configurations contributed by users of MeTube:
 * [YTDL_OPTIONS Cookbook](https://github.com/alexta69/metube/wiki/YTDL_OPTIONS-Cookbook)
 * [OUTPUT_TEMPLATE Cookbook](https://github.com/alexta69/metube/wiki/OUTPUT_TEMPLATE-Cookbook)
@@ -118,17 +235,6 @@ __Firefox:__ contributed by [nanocortex](https://github.com/nanocortex). You can
 
 [rithask](https://github.com/rithask) created an iOS shortcut to send URLs to MeTube from Safari. Enter the MeTube instance address when prompted which will be saved for later use. You can run the shortcut from Safari’s share menu. The shortcut can be downloaded from [this iCloud link](https://www.icloud.com/shortcuts/66627a9f334c467baabdb2769763a1a6).
 
-## 📱 iOS Compatibility
-
-iOS has strict requirements for video files, requiring h264 or h265 video codec and aac audio codec in MP4 container. This can sometimes be a lower quality than the best quality available. To accommodate iOS requirements, when downloading a MP4 format you can choose "Best (iOS)" to get the best quality formats as compatible as possible with iOS requirements.
-
-To force all downloads to be converted to an iOS-compatible codec, insert this as an environment variable: 
-
-```yaml
-  environment:
-    - 'YTDL_OPTIONS={"format": "best", "exec": "ffmpeg -i %(filepath)q -c:v libx264 -c:a aac %(filepath)q.h264.mp4"}'
-```
-
 ## 🔖 Bookmarklet
 
 [kushfest](https://github.com/kushfest) has created a Chrome bookmarklet for sending the currently open webpage to MeTube. Please note that if you're on an HTTPS page, your MeTube instance must be configured with `HTTPS` as `true` in the environment, or be behind an HTTPS reverse proxy (see below) for the bookmarklet to work.

app/main.py

@@ -57,6 +57,9 @@ class Config:
         'CLEAR_COMPLETED_AFTER': '0',
         'YTDL_OPTIONS': '{}',
         'YTDL_OPTIONS_FILE': '',
+        'YTDL_OPTIONS_PRESETS': '{}',
+        'YTDL_OPTIONS_PRESETS_FILE': '',
+        'ALLOW_YTDL_OPTIONS_OVERRIDES': 'false',
         'ROBOTS_TXT': '',
         'HOST': '0.0.0.0',
         'PORT': '8081',
@@ -70,7 +73,7 @@ class Config:
         'ENABLE_ACCESSLOG': 'false',
     }
 
-    _BOOLEAN = ('DOWNLOAD_DIRS_INDEXABLE', 'CUSTOM_DIRS', 'CREATE_CUSTOM_DIRS', 'DELETE_FILE_ON_TRASHCAN', 'HTTPS', 'ENABLE_ACCESSLOG')
+    _BOOLEAN = ('DOWNLOAD_DIRS_INDEXABLE', 'CUSTOM_DIRS', 'CREATE_CUSTOM_DIRS', 'DELETE_FILE_ON_TRASHCAN', 'HTTPS', 'ENABLE_ACCESSLOG', 'ALLOW_YTDL_OPTIONS_OVERRIDES')
 
     def __init__(self):
         for k, v in self._DEFAULTS.items():
@@ -91,12 +94,17 @@ class Config:
         # Convert relative addresses to absolute addresses to prevent the failure of file address comparison
         if self.YTDL_OPTIONS_FILE and self.YTDL_OPTIONS_FILE.startswith('.'):
             self.YTDL_OPTIONS_FILE = str(Path(self.YTDL_OPTIONS_FILE).resolve())
+        if self.YTDL_OPTIONS_PRESETS_FILE and self.YTDL_OPTIONS_PRESETS_FILE.startswith('.'):
+            self.YTDL_OPTIONS_PRESETS_FILE = str(Path(self.YTDL_OPTIONS_PRESETS_FILE).resolve())
 
         self._runtime_overrides = {}
 
         success,_ = self.load_ytdl_options()
         if not success:
             sys.exit(1)
+        success,_ = self.load_ytdl_option_presets()
+        if not success:
+            sys.exit(1)
 
     def set_runtime_override(self, key, value):
         self._runtime_overrides[key] = value
@@ -119,6 +127,7 @@ class Config:
         'PUBLIC_HOST_AUDIO_URL',
         'DEFAULT_OPTION_PLAYLIST_ITEM_LIMIT',
         'SUBSCRIPTION_DEFAULT_CHECK_INTERVAL',
+        'ALLOW_YTDL_OPTIONS_OVERRIDES',
     )
 
     def frontend_safe(self) -> dict:
@@ -160,6 +169,37 @@ class Config:
         self._apply_runtime_overrides()
         return (True, '')
 
+    def load_ytdl_option_presets(self) -> tuple[bool, str]:
+        try:
+            self.YTDL_OPTIONS_PRESETS = json.loads(os.environ.get('YTDL_OPTIONS_PRESETS', '{}'))
+            assert isinstance(self.YTDL_OPTIONS_PRESETS, dict)
+            assert all(isinstance(name, str) and isinstance(options, dict) for name, options in self.YTDL_OPTIONS_PRESETS.items())
+        except (json.decoder.JSONDecodeError, AssertionError):
+            msg = 'Environment variable YTDL_OPTIONS_PRESETS is invalid'
+            log.error(msg)
+            return (False, msg)
+
+        if not self.YTDL_OPTIONS_PRESETS_FILE:
+            return (True, '')
+
+        log.info(f'Loading yt-dlp option presets from "{self.YTDL_OPTIONS_PRESETS_FILE}"')
+        if not os.path.exists(self.YTDL_OPTIONS_PRESETS_FILE):
+            msg = f'File "{self.YTDL_OPTIONS_PRESETS_FILE}" not found'
+            log.error(msg)
+            return (False, msg)
+        try:
+            with open(self.YTDL_OPTIONS_PRESETS_FILE) as json_data:
+                opts = json.load(json_data)
+            assert isinstance(opts, dict)
+            assert all(isinstance(name, str) and isinstance(options, dict) for name, options in opts.items())
+        except (json.decoder.JSONDecodeError, AssertionError):
+            msg = 'YTDL_OPTIONS_PRESETS_FILE contents is invalid'
+            log.error(msg)
+            return (False, msg)
+
+        self.YTDL_OPTIONS_PRESETS.update(opts)
+        return (True, '')
+
 config = Config()
 # Align root logger level with Config (keeps a single source of truth).
 # This re-applies the log level after Config loads, in case LOGLEVEL was
@@ -194,6 +234,40 @@ VALID_VIDEO_CODECS = {'auto', 'h264', 'h265', 'av1', 'vp9'}
 VALID_VIDEO_FORMATS = {'any', 'mp4', 'ios'}
 VALID_AUDIO_FORMATS = {'m4a', 'mp3', 'opus', 'wav', 'flac'}
 VALID_THUMBNAIL_FORMATS = {'jpg'}
+def _parse_ytdl_options_overrides(value, *, enabled: bool) -> dict:
+    if value is None or value == '':
+        return {}
+
+    if isinstance(value, str):
+        try:
+            value = json.loads(value)
+        except json.JSONDecodeError as exc:
+            raise web.HTTPBadRequest(reason='ytdl_options_overrides must be valid JSON') from exc
+
+    if not isinstance(value, dict):
+        raise web.HTTPBadRequest(reason='ytdl_options_overrides must be a JSON object')
+
+    if value and not enabled:
+        raise web.HTTPBadRequest(reason='ytdl_options_overrides are disabled')
+
+    return value
+
+
+def _parse_ytdl_options_presets(post: dict) -> list[str]:
+    """Normalize preset names from add/subscribe body; supports list or legacy singular string."""
+    raw = post.get('ytdl_options_presets')
+    if raw is None:
+        raw = post.get('ytdl_options_preset')
+    if raw is None:
+        return []
+    if isinstance(raw, list):
+        return [str(x).strip() for x in raw if str(x).strip()]
+    if isinstance(raw, str):
+        s = raw.strip()
+        return [s] if s else []
+    raise web.HTTPBadRequest(
+        reason='ytdl_options_presets must be a JSON array of strings (or legacy ytdl_options_preset string)',
+    )
 
 
 def _migrate_legacy_request(post: dict) -> dict:
@@ -384,6 +458,7 @@ def parse_download_options(post: dict) -> dict:
     chapter_template = post.get('chapter_template')
     subtitle_language = post.get('subtitle_language')
     subtitle_mode = post.get('subtitle_mode')
+    ytdl_options_overrides = post.get('ytdl_options_overrides')
 
     if custom_name_prefix is None:
         custom_name_prefix = ''
@@ -407,6 +482,11 @@ def parse_download_options(post: dict) -> dict:
     quality = str(quality).strip().lower()
     subtitle_language = str(subtitle_language).strip()
     subtitle_mode = str(subtitle_mode).strip()
+    ytdl_options_presets = _parse_ytdl_options_presets(post)
+    ytdl_options_overrides = _parse_ytdl_options_overrides(
+        ytdl_options_overrides,
+        enabled=config.ALLOW_YTDL_OPTIONS_OVERRIDES,
+    )
 
     if chapter_template and ('..' in chapter_template or chapter_template.startswith('/') or chapter_template.startswith('\\')):
         raise web.HTTPBadRequest(reason='chapter_template must not contain ".." or start with a path separator')
@@ -414,6 +494,9 @@ def parse_download_options(post: dict) -> dict:
         raise web.HTTPBadRequest(reason='subtitle_language must match pattern [A-Za-z0-9-] and be at most 35 characters')
     if subtitle_mode not in VALID_SUBTITLE_MODES:
         raise web.HTTPBadRequest(reason=f'subtitle_mode must be one of {sorted(VALID_SUBTITLE_MODES)}')
+    for preset_name in ytdl_options_presets:
+        if preset_name not in config.YTDL_OPTIONS_PRESETS:
+            raise web.HTTPBadRequest(reason='ytdl_options_presets must only contain configured preset names')
 
     if download_type not in VALID_DOWNLOAD_TYPES:
         raise web.HTTPBadRequest(reason=f'download_type must be one of {sorted(VALID_DOWNLOAD_TYPES)}')
@@ -466,6 +549,8 @@ def parse_download_options(post: dict) -> dict:
         'chapter_template': chapter_template,
         'subtitle_language': subtitle_language,
         'subtitle_mode': subtitle_mode,
+        'ytdl_options_presets': ytdl_options_presets,
+        'ytdl_options_overrides': ytdl_options_overrides,
     }
 
 
@@ -500,9 +585,19 @@ async def add(request):
         o['chapter_template'],
         o['subtitle_language'],
         o['subtitle_mode'],
+        o['ytdl_options_presets'],
+        o['ytdl_options_overrides'],
     )
     return web.Response(text=serializer.encode(status))
 
+
+@routes.get(config.URL_PREFIX + 'presets')
+async def presets(request):
+    return web.Response(
+        text=serializer.encode({'presets': sorted(config.YTDL_OPTIONS_PRESETS.keys())}),
+        content_type='application/json',
+    )
+
 @routes.post(config.URL_PREFIX + 'cancel-add')
 async def cancel_add(request):
     dqueue.cancel_add()
@@ -541,6 +636,8 @@ async def subscribe(request):
         chapter_template=o['chapter_template'],
         subtitle_language=o['subtitle_language'],
         subtitle_mode=o['subtitle_mode'],
+        ytdl_options_presets=o['ytdl_options_presets'],
+        ytdl_options_overrides=o['ytdl_options_overrides'],
     )
     return web.Response(text=serializer.encode(result))
 

app/subscriptions.py

@@ -145,6 +145,8 @@ class SubscriptionInfo:
     chapter_template: str = ""
     subtitle_language: str = "en"
     subtitle_mode: str = "prefer_manual"
+    ytdl_options_presets: list[str] = field(default_factory=list)
+    ytdl_options_overrides: dict[str, Any] = field(default_factory=dict)
     last_checked: Optional[float] = None
     seen_ids: list[str] = field(default_factory=list)
     error: Optional[str] = None
@@ -190,24 +192,58 @@ def _subscription_to_record(sub: SubscriptionInfo) -> dict[str, Any]:
         "chapter_template": sub.chapter_template,
         "subtitle_language": sub.subtitle_language,
         "subtitle_mode": sub.subtitle_mode,
+        "ytdl_options_presets": list(sub.ytdl_options_presets),
+        "ytdl_options_overrides": sub.ytdl_options_overrides,
         "last_checked": sub.last_checked,
         "seen_ids": list(sub.seen_ids),
         "error": sub.error,
     }
 
 
+def _normalize_subscription_record(rec: dict[str, Any]) -> dict[str, Any]:
+    """Migrate legacy ytdl_options_preset (str) to ytdl_options_presets (list)."""
+    out = dict(rec)
+    if "ytdl_options_presets" not in out:
+        old = out.pop("ytdl_options_preset", None)
+        if old is None:
+            out["ytdl_options_presets"] = []
+        elif isinstance(old, list):
+            out["ytdl_options_presets"] = [str(x).strip() for x in old if str(x).strip()]
+        elif isinstance(old, str):
+            out["ytdl_options_presets"] = [old.strip()] if old.strip() else []
+        else:
+            out["ytdl_options_presets"] = []
+    else:
+        out.pop("ytdl_options_preset", None)
+    return out
+
+
 def _subscription_from_record(record: Any) -> Optional[SubscriptionInfo]:
     field_names = {f.name for f in fields(SubscriptionInfo)}
     if isinstance(record, SubscriptionInfo):
         return record
     if isinstance(record, dict):
         try:
-            return SubscriptionInfo(**{k: v for k, v in record.items() if k in field_names})
+            normalized = _normalize_subscription_record(dict(record))
+            return SubscriptionInfo(**{k: v for k, v in normalized.items() if k in field_names})
         except TypeError:
             return None
     return None
 
 
+def _coerce_bool(value: Any) -> bool:
+    """Accept JSON booleans and common string forms used by API clients."""
+    if isinstance(value, bool):
+        return value
+    if isinstance(value, str):
+        lowered = value.strip().lower()
+        if lowered in {"true", "1", "on"}:
+            return True
+        if lowered in {"false", "0", "off"}:
+            return False
+    raise ValueError("enabled must be a boolean")
+
+
 class SubscriptionNotifier:
     """Hook for Socket.IO / UI updates."""
 
@@ -311,9 +347,12 @@ class SubscriptionManager:
         chapter_template: str,
         subtitle_language: str,
         subtitle_mode: str,
+        ytdl_options_presets: Optional[list[str]] = None,
+        ytdl_options_overrides: Optional[dict[str, Any]] = None,
     ) -> tuple[list[str], list[str]]:
         queued_ids: list[str] = []
         queue_errors: list[str] = []
+        presets = list(ytdl_options_presets or [])
         for ent in entries:
             eid = _entry_id(ent)
             vurl = _entry_video_url(ent)
@@ -336,6 +375,8 @@ class SubscriptionManager:
                 chapter_template or None,
                 subtitle_language,
                 subtitle_mode,
+                presets,
+                ytdl_options_overrides,
             )
             if isinstance(result, dict) and result.get("status") == "error":
                 msg = str(result.get("msg") or f"Queueing failed for {vurl}")
@@ -403,6 +444,8 @@ class SubscriptionManager:
         chapter_template: str,
         subtitle_language: str,
         subtitle_mode: str,
+        ytdl_options_presets: Optional[list[str]] = None,
+        ytdl_options_overrides: Optional[dict[str, Any]] = None,
     ) -> dict:
         url = self._normalize_url(url)
         if not url:
@@ -460,6 +503,8 @@ class SubscriptionManager:
                 chapter_template=chapter_template or "",
                 subtitle_language=subtitle_language,
                 subtitle_mode=subtitle_mode,
+                ytdl_options_presets=list(ytdl_options_presets or []),
+                ytdl_options_overrides=dict(ytdl_options_overrides or {}),
                 last_checked=time.time(),
                 seen_ids=list(dict.fromkeys(all_ids)),
                 error=None,
@@ -514,7 +559,7 @@ class SubscriptionManager:
             old_enabled = sub.enabled
 
             if "enabled" in changes:
-                sub.enabled = bool(changes["enabled"])
+                sub.enabled = _coerce_bool(changes["enabled"])
             if "check_interval_minutes" in changes:
                 sub.check_interval_minutes = max(1, int(changes["check_interval_minutes"]))
             if "name" in changes and changes["name"]:
@@ -608,6 +653,8 @@ class SubscriptionManager:
             dl_chapter = cur.chapter_template
             dl_sublang = cur.subtitle_language
             dl_submode = cur.subtitle_mode
+            dl_ytdl_presets = list(cur.ytdl_options_presets)
+            dl_ytdl_overrides = dict(cur.ytdl_options_overrides)
 
         new_entries: list[dict] = []
         new_ids: list[str] = []
@@ -632,6 +679,8 @@ class SubscriptionManager:
             chapter_template=dl_chapter or "",
             subtitle_language=dl_sublang,
             subtitle_mode=dl_submode,
+            ytdl_options_presets=dl_ytdl_presets,
+            ytdl_options_overrides=dl_ytdl_overrides,
         )
         log.info(
             "Subscription check finished for %s: %d new, %d queued, %d failed",

app/tests/test_api.py

@@ -37,6 +37,8 @@ def _valid_video_add_body(**kwargs):
         "codec": "auto",
         "format": "any",
         "quality": "best",
+        "ytdl_options_presets": [],
+        "ytdl_options_overrides": "",
     }
     base.update(kwargs)
     return base
@@ -59,6 +61,37 @@ async def test_add_ok(mock_dqueue):
     mock_dqueue.add.assert_awaited_once()
 
 
+@pytest.mark.asyncio
+async def test_add_passes_preset_and_overrides(mock_dqueue, monkeypatch):
+    monkeypatch.setattr(main.config, "YTDL_OPTIONS_PRESETS", {"Preset A": {"writesubtitles": True}})
+    monkeypatch.setattr(main.config, "ALLOW_YTDL_OPTIONS_OVERRIDES", True)
+    req = _json_request(
+        _valid_video_add_body(
+            ytdl_options_presets=["Preset A"],
+            ytdl_options_overrides='{"writesubtitles": true}',
+        )
+    )
+    resp = await main.add(req)
+    assert resp.status == 200
+    call = mock_dqueue.add.await_args
+    assert call is not None
+    assert call.args[13] == ["Preset A"]
+    assert call.args[14] == {"writesubtitles": True}
+
+
+@pytest.mark.asyncio
+async def test_add_legacy_string_preset_normalized(mock_dqueue, monkeypatch):
+    monkeypatch.setattr(main.config, "YTDL_OPTIONS_PRESETS", {"Legacy": {}})
+    body = _valid_video_add_body()
+    del body["ytdl_options_presets"]
+    body["ytdl_options_preset"] = "Legacy"
+    req = _json_request(body)
+    resp = await main.add(req)
+    assert resp.status == 200
+    call = mock_dqueue.add.await_args
+    assert call.args[13] == ["Legacy"]
+
+
 @pytest.mark.asyncio
 async def test_add_missing_url_returns_400(mock_dqueue):
     req = _json_request({"download_type": "video", "quality": "best", "format": "any"})
@@ -124,6 +157,38 @@ async def test_add_invalid_json_body(mock_dqueue):
         await main.add(req)
 
 
+@pytest.mark.asyncio
+async def test_add_invalid_ytdl_options_override_json(mock_dqueue):
+    req = _json_request(_valid_video_add_body(ytdl_options_overrides="{bad json}"))
+    with pytest.raises(web.HTTPBadRequest):
+        await main.add(req)
+
+
+@pytest.mark.asyncio
+async def test_add_rejects_ytdl_options_overrides_when_disabled(mock_dqueue):
+    req = _json_request(_valid_video_add_body(ytdl_options_overrides='{"exec": "rm -rf /"}'))
+    with pytest.raises(web.HTTPBadRequest):
+        await main.add(req)
+
+
+@pytest.mark.asyncio
+async def test_add_allows_any_ytdl_options_override_key_when_enabled(mock_dqueue, monkeypatch):
+    monkeypatch.setattr(main.config, "ALLOW_YTDL_OPTIONS_OVERRIDES", True)
+    req = _json_request(_valid_video_add_body(ytdl_options_overrides='{"exec": "echo hi"}'))
+    resp = await main.add(req)
+    assert resp.status == 200
+    call = mock_dqueue.add.await_args
+    assert call is not None
+    assert call.args[14] == {"exec": "echo hi"}
+
+
+@pytest.mark.asyncio
+async def test_add_unknown_ytdl_preset(mock_dqueue):
+    req = _json_request(_valid_video_add_body(ytdl_options_presets=["Missing"]))
+    with pytest.raises(web.HTTPBadRequest):
+        await main.add(req)
+
+
 @pytest.mark.asyncio
 async def test_delete_missing_ids(mock_dqueue):
     req = _json_request({"where": "queue"})
@@ -168,6 +233,15 @@ async def test_version_json(mock_dqueue):
     assert "yt-dlp" in body and "version" in body
 
 
+@pytest.mark.asyncio
+async def test_presets_endpoint_returns_names(mock_dqueue, monkeypatch):
+    monkeypatch.setattr(main.config, "YTDL_OPTIONS_PRESETS", {"Preset B": {}, "Preset A": {}})
+    req = MagicMock(spec=web.Request)
+    resp = await main.presets(req)
+    assert resp.status == 200
+    assert json.loads(resp.text) == {"presets": ["Preset A", "Preset B"]}
+
+
 @pytest.mark.asyncio
 async def test_cookie_status(mock_dqueue):
     req = MagicMock(spec=web.Request)

app/tests/test_config.py

@@ -33,6 +33,16 @@ class ConfigTests(unittest.TestCase):
             c = Config()
         self.assertEqual(c.YTDL_OPTIONS["quiet"], True)
 
+    def test_ytdl_option_presets_json_loaded(self):
+        presets = {"Audio extras": {"embed_thumbnail": True}}
+        with patch.dict(
+            os.environ,
+            _base_env(YTDL_OPTIONS_PRESETS=json.dumps(presets)),
+            clear=False,
+        ):
+            c = Config()
+        self.assertEqual(c.YTDL_OPTIONS_PRESETS["Audio extras"]["embed_thumbnail"], True)
+
     def test_invalid_ytdl_options_exits(self):
         with patch.dict(os.environ, _base_env(YTDL_OPTIONS="not-json"), clear=False):
             with self.assertRaises(SystemExit):
@@ -49,6 +59,12 @@ class ConfigTests(unittest.TestCase):
         safe = c.frontend_safe()
         self.assertNotIn("YTDL_OPTIONS", safe)
         self.assertNotIn("HOST", safe)
+        self.assertEqual(safe["ALLOW_YTDL_OPTIONS_OVERRIDES"], False)
+
+    def test_allow_ytdl_options_overrides_boolean_loaded(self):
+        with patch.dict(os.environ, _base_env(ALLOW_YTDL_OPTIONS_OVERRIDES="true"), clear=False):
+            c = Config()
+        self.assertTrue(c.ALLOW_YTDL_OPTIONS_OVERRIDES)
 
     def test_runtime_override_roundtrip(self):
         with patch.dict(os.environ, _base_env(), clear=False):
@@ -73,6 +89,21 @@ class ConfigTests(unittest.TestCase):
         finally:
             os.unlink(path)
 
+    def test_ytdl_option_presets_file_merges(self):
+        with tempfile.NamedTemporaryFile("w", suffix=".json", delete=False) as f:
+            json.dump({"With subtitles": {"writesubtitles": True}}, f)
+            path = f.name
+        try:
+            with patch.dict(
+                os.environ,
+                _base_env(YTDL_OPTIONS_PRESETS="{}", YTDL_OPTIONS_PRESETS_FILE=path),
+                clear=False,
+            ):
+                c = Config()
+            self.assertIn("With subtitles", c.YTDL_OPTIONS_PRESETS)
+        finally:
+            os.unlink(path)
+
 
 if __name__ == "__main__":
     unittest.main()

app/tests/test_download_queue.py

@@ -25,6 +25,7 @@ def dq_env():
         cfg.TEMP_DIR = dl
         cfg.MAX_CONCURRENT_DOWNLOADS = "3"
         cfg.YTDL_OPTIONS = {}
+        cfg.YTDL_OPTIONS_PRESETS = {}
         cfg.CUSTOM_DIRS = True
         cfg.CREATE_CUSTOM_DIRS = True
         cfg.CLEAR_COMPLETED_AFTER = "0"
@@ -175,3 +176,46 @@ async def test_add_entry_queues_single_video_without_reextracting(dq_env):
 
     assert result["status"] == "ok"
     assert dq.pending.exists("https://example.com/watch?v=1")
+
+
+@pytest.mark.asyncio
+async def test_add_merges_global_preset_and_override_options(dq_env):
+    notifier = AsyncMock()
+    dq_env.YTDL_OPTIONS = {"writesubtitles": False, "cookiefile": "/tmp/global.txt"}
+    dq_env.YTDL_OPTIONS_PRESETS = {
+        "Preset A": {"writesubtitles": True, "proxy": "http://preset-a"},
+        "Preset B": {"writesubtitles": False, "ratelimit": 1000},
+    }
+
+    def fake_extract(self, url):
+        return {
+            "_type": "video",
+            "id": "vid2",
+            "title": "Preset Video",
+            "url": url,
+            "webpage_url": url,
+        }
+
+    dq = DownloadQueue(dq_env, notifier)
+    with patch.object(DownloadQueue, "_DownloadQueue__extract_info", fake_extract):
+        result = await dq.add(
+            "https://example.com/preset",
+            "video",
+            "auto",
+            "any",
+            "best",
+            "",
+            "",
+            0,
+            auto_start=False,
+            ytdl_options_presets=["Preset A", "Preset B"],
+            ytdl_options_overrides={"proxy": "http://override", "embed_thumbnail": True},
+        )
+
+    assert result["status"] == "ok"
+    queued = dq.pending.get("https://example.com/preset")
+    assert queued.ytdl_opts["cookiefile"] == "/tmp/global.txt"
+    assert queued.ytdl_opts["writesubtitles"] is False
+    assert queued.ytdl_opts["ratelimit"] == 1000
+    assert queued.ytdl_opts["proxy"] == "http://override"
+    assert queued.ytdl_opts["embed_thumbnail"] is True

app/tests/test_main_helpers.py

@@ -99,6 +99,111 @@ class FrontendSafeTests(unittest.TestCase):
             self.assertIn(key, safe)
         self.assertNotIn("YTDL_OPTIONS", safe)
         self.assertNotIn("DOWNLOAD_DIR", safe)
+        self.assertIn("ALLOW_YTDL_OPTIONS_OVERRIDES", safe)
+
+
+class ParseYtdlOverridesTests(unittest.TestCase):
+    def test_empty_override_string_returns_empty_dict(self):
+        self.assertEqual(main._parse_ytdl_options_overrides("", enabled=False), {})
+
+    def test_rejects_non_object_json(self):
+        with self.assertRaises(main.web.HTTPBadRequest):
+            main._parse_ytdl_options_overrides('["bad"]', enabled=True)
+
+    def test_rejects_non_empty_overrides_when_disabled(self):
+        with self.assertRaises(main.web.HTTPBadRequest):
+            main._parse_ytdl_options_overrides('{"exec": "rm -rf /"}', enabled=False)
+
+    def test_allows_any_keys_when_enabled(self):
+        self.assertEqual(
+            main._parse_ytdl_options_overrides('{"exec": "rm -rf /"}', enabled=True),
+            {"exec": "rm -rf /"},
+        )
+
+
+class ParseDownloadOptionsTests(unittest.TestCase):
+    def test_accepts_known_preset_and_overrides(self):
+        previous = dict(main.config.YTDL_OPTIONS_PRESETS)
+        previous_allow = main.config.ALLOW_YTDL_OPTIONS_OVERRIDES
+        main.config.YTDL_OPTIONS_PRESETS = {"With subtitles": {"writesubtitles": True}}
+        main.config.ALLOW_YTDL_OPTIONS_OVERRIDES = True
+        try:
+            parsed = main.parse_download_options({
+                "url": "https://example.com/v",
+                "download_type": "video",
+                "codec": "auto",
+                "format": "any",
+                "quality": "best",
+                "ytdl_options_preset": "With subtitles",
+                "ytdl_options_overrides": '{"writesubtitles": true}',
+            })
+        finally:
+            main.config.YTDL_OPTIONS_PRESETS = previous
+            main.config.ALLOW_YTDL_OPTIONS_OVERRIDES = previous_allow
+        self.assertEqual(parsed["ytdl_options_presets"], ["With subtitles"])
+        self.assertEqual(parsed["ytdl_options_overrides"], {"writesubtitles": True})
+
+    def test_accepts_multiple_presets_in_order(self):
+        previous = dict(main.config.YTDL_OPTIONS_PRESETS)
+        main.config.YTDL_OPTIONS_PRESETS = {
+            "A": {"writesubtitles": True},
+            "B": {"writesubtitles": False},
+        }
+        try:
+            parsed = main.parse_download_options({
+                "url": "https://example.com/v",
+                "download_type": "video",
+                "codec": "auto",
+                "format": "any",
+                "quality": "best",
+                "ytdl_options_presets": ["A", "B"],
+            })
+        finally:
+            main.config.YTDL_OPTIONS_PRESETS = previous
+        self.assertEqual(parsed["ytdl_options_presets"], ["A", "B"])
+
+    def test_legacy_singular_preset_string_normalized_to_list(self):
+        previous = dict(main.config.YTDL_OPTIONS_PRESETS)
+        main.config.YTDL_OPTIONS_PRESETS = {"Solo": {}}
+        try:
+            parsed = main.parse_download_options({
+                "url": "https://example.com/v",
+                "download_type": "video",
+                "codec": "auto",
+                "format": "any",
+                "quality": "best",
+                "ytdl_options_preset": "Solo",
+            })
+        finally:
+            main.config.YTDL_OPTIONS_PRESETS = previous
+        self.assertEqual(parsed["ytdl_options_presets"], ["Solo"])
+
+    def test_rejects_unknown_preset(self):
+        with self.assertRaises(main.web.HTTPBadRequest):
+            main.parse_download_options({
+                "url": "https://example.com/v",
+                "download_type": "video",
+                "codec": "auto",
+                "format": "any",
+                "quality": "best",
+                "ytdl_options_presets": ["Missing preset"],
+            })
+
+    def test_rejects_unknown_preset_in_list(self):
+        previous = dict(main.config.YTDL_OPTIONS_PRESETS)
+        main.config.YTDL_OPTIONS_PRESETS = {"Known": {}}
+        try:
+            with self.assertRaises(main.web.HTTPBadRequest):
+                main.parse_download_options({
+                    "url": "https://example.com/v",
+                    "download_type": "video",
+                    "codec": "auto",
+                    "format": "any",
+                    "quality": "best",
+                    "ytdl_options_presets": ["Known", "Nope"],
+                })
+        finally:
+            main.config.YTDL_OPTIONS_PRESETS = previous
 
 
 if __name__ == "__main__":

app/tests/test_subscriptions.py

@@ -386,6 +386,73 @@ class SubscriptionPersistenceTests(unittest.IsolatedAsyncioTestCase):
             self.assertEqual(sub.seen_ids[:2], ["v2", "v1"])
             self.assertEqual([entry["webpage_url"] for entry, _, _ in queue.entries], ["https://example.com/v2"])
 
+    async def test_update_subscription_parses_string_false_enabled(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            queue = _Queue()
+            mgr = SubscriptionManager(_Config(tmp), queue, _Notifier())
+
+            with patch(
+                "subscriptions.extract_flat_playlist",
+                return_value=(
+                    {"_type": "channel", "title": "Channel"},
+                    [{"id": "v1", "title": "One", "webpage_url": "https://example.com/v1"}],
+                ),
+            ):
+                result = await mgr.add_subscription(
+                    "https://example.com/channel",
+                    check_interval_minutes=60,
+                    download_type="video",
+                    codec="auto",
+                    format="any",
+                    quality="best",
+                    folder="",
+                    custom_name_prefix="",
+                    auto_start=True,
+                    playlist_item_limit=0,
+                    split_by_chapters=False,
+                    chapter_template="",
+                    subtitle_language="en",
+                    subtitle_mode="prefer_manual",
+                )
+
+            sub_id = result["subscription"]["id"]
+            update = await mgr.update_subscription(sub_id, {"enabled": "false"})
+            self.assertEqual(update["status"], "ok")
+            self.assertFalse(mgr.list_all()[0].enabled)
+
+    async def test_update_subscription_rejects_invalid_enabled_value(self):
+        with tempfile.TemporaryDirectory() as tmp:
+            queue = _Queue()
+            mgr = SubscriptionManager(_Config(tmp), queue, _Notifier())
+
+            with patch(
+                "subscriptions.extract_flat_playlist",
+                return_value=(
+                    {"_type": "channel", "title": "Channel"},
+                    [{"id": "v1", "title": "One", "webpage_url": "https://example.com/v1"}],
+                ),
+            ):
+                result = await mgr.add_subscription(
+                    "https://example.com/channel",
+                    check_interval_minutes=60,
+                    download_type="video",
+                    codec="auto",
+                    format="any",
+                    quality="best",
+                    folder="",
+                    custom_name_prefix="",
+                    auto_start=True,
+                    playlist_item_limit=0,
+                    split_by_chapters=False,
+                    chapter_template="",
+                    subtitle_language="en",
+                    subtitle_mode="prefer_manual",
+                )
+
+            sub_id = result["subscription"]["id"]
+            with self.assertRaises(ValueError):
+                await mgr.update_subscription(sub_id, {"enabled": "maybe"})
+
 class ExtractFlatPlaylistTests(unittest.TestCase):
     def test_descends_one_level_when_root_entries_are_nested_collections(self):
         responses = iter(

app/ytdl.py

@@ -188,6 +188,8 @@ class DownloadInfo:
         chapter_template,
         subtitle_language="en",
         subtitle_mode="prefer_manual",
+        ytdl_options_presets=None,
+        ytdl_options_overrides=None,
     ):
         self.id = id if len(custom_name_prefix) == 0 else f'{custom_name_prefix}.{id}'
         self.title = title if len(custom_name_prefix) == 0 else f'{custom_name_prefix}.{title}'
@@ -210,6 +212,8 @@ class DownloadInfo:
         self.chapter_template = chapter_template
         self.subtitle_language = subtitle_language
         self.subtitle_mode = subtitle_mode
+        self.ytdl_options_presets = list(ytdl_options_presets or [])
+        self.ytdl_options_overrides = dict(ytdl_options_overrides or {})
         self.subtitle_files = []
 
     def __setstate__(self, state):
@@ -262,6 +266,16 @@ class DownloadInfo:
             self.subtitle_language = "en"
         if not hasattr(self, "subtitle_mode"):
             self.subtitle_mode = "prefer_manual"
+        legacy_preset = self.__dict__.pop("ytdl_options_preset", None)
+        if "ytdl_options_presets" not in self.__dict__:
+            if isinstance(legacy_preset, str) and legacy_preset.strip():
+                self.ytdl_options_presets = [legacy_preset.strip()]
+            elif isinstance(legacy_preset, list):
+                self.ytdl_options_presets = [str(x).strip() for x in legacy_preset if str(x).strip()]
+            else:
+                self.ytdl_options_presets = []
+        if not hasattr(self, "ytdl_options_overrides"):
+            self.ytdl_options_overrides = {}
         if not hasattr(self, "entry"):
             self.entry = None
         if not hasattr(self, "subtitle_files"):
@@ -285,6 +299,8 @@ _PERSISTED_DOWNLOAD_FIELDS = (
     "chapter_template",
     "subtitle_language",
     "subtitle_mode",
+    "ytdl_options_presets",
+    "ytdl_options_overrides",
     "status",
     "timestamp",
     "error",
@@ -828,6 +844,9 @@ class DownloadQueue:
             sanitized = {k: _sanitize_path_component(v) for k, v in entry.items()}
             output = _resolve_outtmpl_fields(output, sanitized, ('channel',))
         ytdl_options = dict(self.config.YTDL_OPTIONS)
+        for preset_name in getattr(dl, 'ytdl_options_presets', None) or []:
+            ytdl_options.update(self.config.YTDL_OPTIONS_PRESETS.get(preset_name, {}))
+        ytdl_options.update(getattr(dl, 'ytdl_options_overrides', {}) or {})
         playlist_item_limit = getattr(dl, 'playlist_item_limit', 0)
         if playlist_item_limit > 0:
             log.info(f'playlist limit is set. Processing only first {playlist_item_limit} entries')
@@ -855,6 +874,8 @@ class DownloadQueue:
         chapter_template,
         subtitle_language,
         subtitle_mode,
+        ytdl_options_presets,
+        ytdl_options_overrides,
         already,
         _add_gen=None,
     ):
@@ -887,6 +908,8 @@ class DownloadQueue:
                 chapter_template,
                 subtitle_language,
                 subtitle_mode,
+                ytdl_options_presets,
+                ytdl_options_overrides,
                 already,
                 _add_gen,
             )
@@ -934,6 +957,8 @@ class DownloadQueue:
                         chapter_template,
                         subtitle_language,
                         subtitle_mode,
+                        ytdl_options_presets,
+                        ytdl_options_overrides,
                         already,
                         _add_gen,
                     )
@@ -965,6 +990,8 @@ class DownloadQueue:
                     chapter_template=chapter_template,
                     subtitle_language=subtitle_language,
                     subtitle_mode=subtitle_mode,
+                    ytdl_options_presets=ytdl_options_presets,
+                    ytdl_options_overrides=ytdl_options_overrides,
                 )
                 await self.__add_download(dl, auto_start)
             return {'status': 'ok'}
@@ -985,13 +1012,17 @@ class DownloadQueue:
         chapter_template=None,
         subtitle_language="en",
         subtitle_mode="prefer_manual",
+        ytdl_options_presets=None,
+        ytdl_options_overrides=None,
         already=None,
         _add_gen=None,
     ):
+        if ytdl_options_presets is None:
+            ytdl_options_presets = []
         log.info(
             f'adding {url}: {download_type=} {codec=} {format=} {quality=} {already=} {folder=} {custom_name_prefix=} '
             f'{playlist_item_limit=} {auto_start=} {split_by_chapters=} {chapter_template=} '
-            f'{subtitle_language=} {subtitle_mode=}'
+            f'{subtitle_language=} {subtitle_mode=} {ytdl_options_presets=}'
         )
         if already is None:
             _add_gen = self._add_generation
@@ -1020,6 +1051,8 @@ class DownloadQueue:
             chapter_template,
             subtitle_language,
             subtitle_mode,
+            ytdl_options_presets,
+            ytdl_options_overrides,
             already,
             _add_gen,
         )
@@ -1039,7 +1072,11 @@ class DownloadQueue:
         chapter_template=None,
         subtitle_language="en",
         subtitle_mode="prefer_manual",
+        ytdl_options_presets=None,
+        ytdl_options_overrides=None,
     ):
+        if ytdl_options_presets is None:
+            ytdl_options_presets = []
         normalized_entry = copy.deepcopy(entry) if isinstance(entry, dict) else entry
         already = set()
         return await self.__add_entry(
@@ -1056,6 +1093,8 @@ class DownloadQueue:
             chapter_template,
             subtitle_language,
             subtitle_mode,
+            ytdl_options_presets,
+            ytdl_options_overrides,
             already,
             None,
         )

ui/package.json

@@ -23,14 +23,14 @@
   },
   "private": true,
   "dependencies": {
-    "@angular/animations": "^21.2.6",
-    "@angular/common": "^21.2.6",
-    "@angular/compiler": "^21.2.6",
-    "@angular/core": "^21.2.6",
-    "@angular/forms": "^21.2.6",
-    "@angular/platform-browser": "^21.2.6",
-    "@angular/platform-browser-dynamic": "^21.2.6",
-    "@angular/service-worker": "^21.2.6",
+    "@angular/animations": "^21.2.7",
+    "@angular/common": "^21.2.7",
+    "@angular/compiler": "^21.2.7",
+    "@angular/core": "^21.2.7",
+    "@angular/forms": "^21.2.7",
+    "@angular/platform-browser": "^21.2.7",
+    "@angular/platform-browser-dynamic": "^21.2.7",
+    "@angular/service-worker": "^21.2.7",
     "@fortawesome/angular-fontawesome": "~4.0.0",
     "@fortawesome/fontawesome-svg-core": "^7.2.0",
     "@fortawesome/free-brands-svg-icons": "^7.2.0",
@@ -48,10 +48,10 @@
   },
   "devDependencies": {
     "@angular-eslint/builder": "21.1.0",
-    "@angular/build": "^21.2.5",
-    "@angular/cli": "^21.2.5",
-    "@angular/compiler-cli": "^21.2.6",
-    "@angular/localize": "^21.2.6",
+    "@angular/build": "^21.2.6",
+    "@angular/cli": "^21.2.6",
+    "@angular/compiler-cli": "^21.2.7",
+    "@angular/localize": "^21.2.7",
     "@eslint/js": "^9.39.4",
     "angular-eslint": "21.1.0",
     "eslint": "^9.39.4",

ui/src/app/app.html

@@ -369,23 +369,10 @@
       <div class="row">
         <div class="col-12">
           <div class="collapse show" id="advancedOptions" [ngbCollapse]="!isAdvancedOpen">
-            <div class="py-2">
-              <!-- Advanced Settings -->
-              <div class="row g-3 mb-2">
-                <div class="col-md-6">
-                  <div class="input-group">
-                    <span class="input-group-text">Auto Start</span>
-                    <select class="form-select"
-                      name="autoStart"
-                      [(ngModel)]="autoStart"
-                      (change)="autoStartChanged()"
-                      [disabled]="addInProgress || subscribeInProgress || downloads.loading"
-                      ngbTooltip="Automatically start downloads when added">
-                      <option [ngValue]="true">Yes</option>
-                      <option [ngValue]="false">No</option>
-                    </select>
-                  </div>
-                </div>
+            <div class="pt-1 pb-2">
+              <!-- Output -->
+              <div class="settings-section-label">Output</div>
+              <div class="row g-3">
                 <div class="col-md-6">
                   <div class="input-group">
                     <span class="input-group-text">Download Folder</span>
@@ -405,7 +392,6 @@
                       ngbTooltip="Choose where to save downloads. Type to create a new folder." />
                   }
                   </div>
-
                 </div>
                 <div class="col-md-6">
                   <div class="input-group">
@@ -419,6 +405,48 @@
                       ngbTooltip="Add a prefix to downloaded filenames">
                   </div>
                 </div>
+                <div class="col-12">
+                  <div class="row g-2 align-items-center">
+                    <div class="col-auto">
+                      <div class="form-check form-switch">
+                        <input class="form-check-input" type="checkbox" role="switch" id="checkbox-split-chapters"
+                          name="splitByChapters" [(ngModel)]="splitByChapters" (change)="splitByChaptersChanged()"
+                          [disabled]="addInProgress || subscribeInProgress || downloads.loading"
+                          ngbTooltip="Split video into separate files by chapters">
+                        <label class="form-check-label" for="checkbox-split-chapters">Split by chapters</label>
+                      </div>
+                    </div>
+                    @if (splitByChapters) {
+                    <div class="col">
+                      <div class="input-group">
+                        <span class="input-group-text">Template</span>
+                        <input type="text" class="form-control" name="chapterTemplate" [(ngModel)]="chapterTemplate"
+                          (change)="chapterTemplateChanged()" [disabled]="addInProgress || subscribeInProgress || downloads.loading"
+                          ngbTooltip="Output template for chapter files">
+                      </div>
+                    </div>
+                    }
+                  </div>
+                </div>
+              </div>
+
+              <!-- Behavior -->
+              <div class="settings-section-label">Behavior</div>
+              <div class="row g-3">
+                <div class="col-md-6">
+                  <div class="input-group">
+                    <span class="input-group-text">Auto Start</span>
+                    <select class="form-select"
+                      name="autoStart"
+                      [(ngModel)]="autoStart"
+                      (change)="autoStartChanged()"
+                      [disabled]="addInProgress || subscribeInProgress || downloads.loading"
+                      ngbTooltip="Automatically start downloads when added">
+                      <option [ngValue]="true">Yes</option>
+                      <option [ngValue]="false">No</option>
+                    </select>
+                  </div>
+                </div>
                 <div class="col-md-6">
                   <div class="input-group">
                     <span class="input-group-text">Items Limit</span>
@@ -447,100 +475,109 @@
                       ngbTooltip="How often to poll subscriptions for new videos">
                   </div>
                 </div>
-                <div class="col-12">
-                  <div class="row g-2 align-items-center">
-                    <div class="col-auto">
-                      <div class="form-check form-switch">
-                        <input class="form-check-input" type="checkbox" role="switch" id="checkbox-split-chapters"
-                          name="splitByChapters" [(ngModel)]="splitByChapters" (change)="splitByChaptersChanged()"
-                          [disabled]="addInProgress || subscribeInProgress || downloads.loading"
-                          ngbTooltip="Split video into separate files by chapters">
-                        <label class="form-check-label" for="checkbox-split-chapters">Split by chapters</label>
-                      </div>
-                    </div>
-                    @if (splitByChapters) {
-                    <div class="col">
-                      <div class="input-group">
-                        <span class="input-group-text">Template</span>
-                        <input type="text" class="form-control" name="chapterTemplate" [(ngModel)]="chapterTemplate"
-                          (change)="chapterTemplateChanged()" [disabled]="addInProgress || subscribeInProgress || downloads.loading"
-                          ngbTooltip="Output template for chapter files">
-                      </div>
-                    </div>
+              </div>
+
+              <!-- yt-dlp -->
+              <div class="settings-section-label">yt-dlp</div>
+              <div class="row g-3">
+                <div class="col-12" [class.col-md-6]="allowYtdlOptionsOverrides()">
+                  <div class="input-group">
+                    <span class="input-group-text">Option Presets</span>
+                    <ng-select
+                      class="flex-grow-1"
+                      name="ytdlOptionsPresets"
+                      [items]="ytdlOptionPresetNames"
+                      [multiple]="true"
+                      [closeOnSelect]="false"
+                      placeholder="Default"
+                      [(ngModel)]="ytdlOptionsPresets"
+                      (ngModelChange)="ytdlOptionsPresetsChanged()"
+                      [disabled]="addInProgress || subscribeInProgress || downloads.loading"
+                      ngbTooltip="Choose one or more yt-dlp option presets configured on the server (applied in order)" />
+                  </div>
+                </div>
+                @if (allowYtdlOptionsOverrides()) {
+                <div class="col-md-6">
+                  <div class="input-group">
+                    <span class="input-group-text">Custom yt-dlp Options</span>
+                    <input type="text"
+                      class="form-control"
+                      placeholder='e.g. {"writesubtitles": true}'
+                      name="ytdlOptionsOverrides"
+                      [(ngModel)]="ytdlOptionsOverrides"
+                      (change)="ytdlOptionsOverridesChanged()"
+                      [disabled]="addInProgress || subscribeInProgress || downloads.loading"
+                      ngbTooltip="Optional per-download yt-dlp overrides as a JSON object">
+                  </div>
+                </div>
+                }
+              </div>
+
+              <!-- Tools -->
+              <div class="settings-section-label">Tools</div>
+              <div class="row g-3">
+                <div class="col-md-4">
+                  <div class="action-group-label">Cookies</div>
+                  <input type="file" id="cookie-upload" class="d-none" accept=".txt"
+                    (change)="onCookieFileSelect($event)"
+                    [disabled]="cookieUploadInProgress || addInProgress">
+                  <div class="btn-group w-100" role="group">
+                    <label class="btn mb-0"
+                      [class]="hasCookies ? 'btn cookie-active-btn mb-0' : 'btn cookie-btn mb-0'"
+                      [class.disabled]="cookieUploadInProgress || addInProgress"
+                      for="cookie-upload"
+                      ngbTooltip="Upload a cookies.txt file for authenticated downloads">
+                      @if (cookieUploadInProgress) {
+                        <span class="spinner-border spinner-border-sm me-2" role="status"></span>
+                      } @else {
+                        <fa-icon [icon]="faUpload" class="me-2" />
+                      }
+                      {{ hasCookies ? 'Replace Cookies' : 'Upload Cookies' }}
+                    </label>
+                    @if (hasCookies) {
+                      <button type="button" class="btn btn-outline-danger"
+                        (click)="deleteCookies()"
+                        [disabled]="cookieUploadInProgress || addInProgress"
+                        ngbTooltip="Remove uploaded cookies">
+                        <fa-icon [icon]="faTrashAlt" />
+                      </button>
+                    }
+                  </div>
+                  <div class="cookie-status" [class.active]="hasCookies">
+                    @if (hasCookies) {
+                      <fa-icon [icon]="faCheckCircle" class="me-1" />
+                      Cookies active
+                    } @else {
+                      No cookies configured
                     }
                   </div>
                 </div>
-              </div>
-
-              <!-- Advanced Actions -->
-              <div class="row">
-                <div class="col-12">
-                  <hr class="my-3">
-                  <div class="row g-3">
-                    <div class="col-md-4">
-                      <div class="action-group-label">Cookies</div>
-                      <input type="file" id="cookie-upload" class="d-none" accept=".txt"
-                        (change)="onCookieFileSelect($event)"
-                        [disabled]="cookieUploadInProgress || addInProgress">
-                      <div class="btn-group w-100" role="group">
-                        <label class="btn mb-0"
-                          [class]="hasCookies ? 'btn cookie-active-btn mb-0' : 'btn cookie-btn mb-0'"
-                          [class.disabled]="cookieUploadInProgress || addInProgress"
-                          for="cookie-upload"
-                          ngbTooltip="Upload a cookies.txt file for authenticated downloads">
-                          @if (cookieUploadInProgress) {
-                            <span class="spinner-border spinner-border-sm me-2" role="status"></span>
-                          } @else {
-                            <fa-icon [icon]="faUpload" class="me-2" />
-                          }
-                          {{ hasCookies ? 'Replace Cookies' : 'Upload Cookies' }}
-                        </label>
-                        @if (hasCookies) {
-                          <button type="button" class="btn btn-outline-danger"
-                            (click)="deleteCookies()"
-                            [disabled]="cookieUploadInProgress || addInProgress"
-                            ngbTooltip="Remove uploaded cookies">
-                            <fa-icon [icon]="faTrashAlt" />
-                          </button>
-                        }
-                      </div>
-                      <div class="cookie-status" [class.active]="hasCookies">
-                        @if (hasCookies) {
-                          <fa-icon [icon]="faCheckCircle" class="me-1" />
-                          Cookies active
-                        } @else {
-                          No cookies configured
-                        }
-                      </div>
+                <div class="col-md-8">
+                  <div class="action-group-label">Bulk Actions</div>
+                  <div class="row g-2">
+                    <div class="col-4">
+                      <button type="button"
+                        class="btn btn-secondary w-100"
+                        (click)="openBatchImportModal()">
+                        <fa-icon [icon]="faFileImport" class="me-2" />
+                        Import URLs
+                      </button>
                     </div>
-                    <div class="col-md-8">
-                      <div class="action-group-label">Bulk Actions</div>
-                      <div class="row g-2">
-                        <div class="col-4">
-                          <button type="button"
-                            class="btn btn-secondary w-100"
-                            (click)="openBatchImportModal()">
-                            <fa-icon [icon]="faFileImport" class="me-2" />
-                            Import URLs
-                          </button>
-                        </div>
-                        <div class="col-4">
-                          <button type="button"
-                            class="btn btn-secondary w-100"
-                            (click)="exportBatchUrls('all')">
-                            <fa-icon [icon]="faFileExport" class="me-2" />
-                            Export URLs
-                          </button>
-                        </div>
-                        <div class="col-4">
-                          <button type="button"
-                            class="btn btn-secondary w-100"
-                            (click)="copyBatchUrls('all')">
-                            <fa-icon [icon]="faCopy" class="me-2" />
-                            Copy URLs
-                          </button>
-                        </div>
-                      </div>
+                    <div class="col-4">
+                      <button type="button"
+                        class="btn btn-secondary w-100"
+                        (click)="exportBatchUrls('all')">
+                        <fa-icon [icon]="faFileExport" class="me-2" />
+                        Export URLs
+                      </button>
+                    </div>
+                    <div class="col-4">
+                      <button type="button"
+                        class="btn btn-secondary w-100"
+                        (click)="copyBatchUrls('all')">
+                        <fa-icon [icon]="faCopy" class="me-2" />
+                        Copy URLs
+                      </button>
                     </div>
                   </div>
                 </div>

ui/src/app/app.sass

@@ -182,6 +182,18 @@ main
     opacity: 0.65
     pointer-events: none
 
+.settings-section-label
+  font-size: 0.8rem
+  text-transform: uppercase
+  letter-spacing: 0.1em
+  font-weight: 600
+  color: var(--bs-body-color)
+  margin-top: 1.75rem
+  margin-bottom: 0.75rem
+
+  &:first-child
+    margin-top: 0
+
 .action-group-label
   font-size: 0.7rem
   text-transform: uppercase

ui/src/app/app.spec.ts

@@ -1,7 +1,101 @@
 import { TestBed } from '@angular/core/testing';
+import { HttpClient } from '@angular/common/http';
+import { Subject, of } from 'rxjs';
 import { App } from './app';
+import { DownloadsService } from './services/downloads.service';
+import { SubscriptionsService } from './services/subscriptions.service';
+import { CookieService } from 'ngx-cookie-service';
+
+class DownloadsServiceStub {
+  loading = false;
+  queue = new Map();
+  done = new Map();
+  configuration: Record<string, unknown> = { CUSTOM_DIRS: true, CREATE_CUSTOM_DIRS: true, ALLOW_YTDL_OPTIONS_OVERRIDES: false };
+  customDirs = { download_dir: [], audio_download_dir: [] };
+  queueChanged = new Subject<void>();
+  doneChanged = new Subject<void>();
+  configurationChanged = new Subject<Record<string, unknown>>();
+  customDirsChanged = new Subject<Record<string, string[]>>();
+  ytdlOptionsChanged = new Subject<Record<string, unknown>>();
+  updated = new Subject<void>();
+
+  getCookieStatus() {
+    return of({ status: 'ok', has_cookies: false });
+  }
+
+  getPresets() {
+    return of({ presets: ['Preset A'] });
+  }
+
+  add() {
+    return of({ status: 'ok' as const });
+  }
+
+  cancelAdd() {
+    return of({ status: 'ok' as const });
+  }
+
+  startById() {
+    return of({});
+  }
+
+  delById() {
+    return of({});
+  }
+
+  delByFilter() {
+    return of({});
+  }
+
+  startByFilter() {
+    return of({});
+  }
+
+  uploadCookies() {
+    return of({ status: 'ok' });
+  }
+
+  deleteCookies() {
+    return of({ status: 'ok' });
+  }
+}
+
+class SubscriptionsServiceStub {
+  subscriptions = new Map();
+  subscriptionsChanged = new Subject<void>();
+
+  subscribe() {
+    return of({ status: 'ok' as const });
+  }
+
+  delete() {
+    return of({});
+  }
+
+  refreshList() {
+    return of([]);
+  }
+}
+
+class CookieServiceStub {
+  private cookies = new Map<string, string>();
+
+  get(name: string) {
+    return this.cookies.get(name) ?? '';
+  }
+
+  set(name: string, value: string) {
+    this.cookies.set(name, value);
+  }
+
+  check(name: string) {
+    return this.cookies.has(name);
+  }
+}
 
 describe('App', () => {
+  let downloads: DownloadsServiceStub;
+
   beforeEach(async () => {
     Object.defineProperty(window, 'matchMedia', {
       writable: true,
@@ -15,8 +109,20 @@ describe('App', () => {
         dispatchEvent: vi.fn(),
       })),
     });
+    downloads = new DownloadsServiceStub();
     await TestBed.configureTestingModule({
       imports: [App],
+      providers: [
+        { provide: DownloadsService, useValue: downloads },
+        { provide: SubscriptionsService, useClass: SubscriptionsServiceStub },
+        { provide: CookieService, useClass: CookieServiceStub },
+        {
+          provide: HttpClient,
+          useValue: {
+            get: vi.fn().mockReturnValue(of({ 'yt-dlp': 'test', version: 'test' })),
+          },
+        },
+      ],
     }).compileComponents();
   });
 
@@ -25,4 +131,48 @@ describe('App', () => {
     const app = fixture.componentInstance;
     expect(app).toBeTruthy();
   });
+
+  it('hides manual override input when disabled', () => {
+    const fixture = TestBed.createComponent(App);
+    fixture.componentInstance.isAdvancedOpen = true;
+    fixture.detectChanges();
+
+    const root = fixture.nativeElement as HTMLElement;
+    expect(root.querySelector('input[name="ytdlOptionsOverrides"]')).toBeNull();
+
+    const presetWrapper = root.querySelector('ng-select[name="ytdlOptionsPresets"]')?.closest('.col-12');
+    expect(presetWrapper?.classList.contains('col-md-6')).toBe(false);
+
+    const presetRow = root.querySelector('ng-select[name="ytdlOptionsPresets"]')?.closest('.row');
+    expect(presetRow?.querySelector('input[name="checkIntervalMinutes"]')).toBeNull();
+  });
+
+  it('shows manual override input when enabled', () => {
+    downloads.configuration['ALLOW_YTDL_OPTIONS_OVERRIDES'] = true;
+
+    const fixture = TestBed.createComponent(App);
+    fixture.componentInstance.isAdvancedOpen = true;
+    fixture.detectChanges();
+
+    const root = fixture.nativeElement as HTMLElement;
+    expect(root.querySelector('input[name="ytdlOptionsOverrides"]')).not.toBeNull();
+
+    const presetWrapper = root.querySelector('ng-select[name="ytdlOptionsPresets"]')?.closest('.col-12');
+    expect(presetWrapper?.classList.contains('col-md-6')).toBe(true);
+
+    const presetRow = root.querySelector('ng-select[name="ytdlOptionsPresets"]')?.closest('.row');
+    expect(presetRow?.querySelector('input[name="checkIntervalMinutes"]')).toBeNull();
+    expect(presetRow?.querySelector('input[name="ytdlOptionsOverrides"]')).not.toBeNull();
+  });
+
+  it('does not submit manual overrides when disabled', () => {
+    const fixture = TestBed.createComponent(App);
+    const app = fixture.componentInstance;
+
+    app.ytdlOptionsOverrides = '{"exec":"echo hi"}';
+
+    const payload = app['buildAddPayload']();
+
+    expect(payload.ytdlOptionsOverrides).toBe('');
+  });
 });

ui/src/app/app.ts

@@ -83,6 +83,9 @@ export class App implements AfterViewInit, OnInit, OnDestroy {
   chapterTemplate: string;
   subtitleLanguage: string;
   subtitleMode: string;
+  ytdlOptionsPresets: string[] = [];
+  ytdlOptionsOverrides: string;
+  ytdlOptionPresetNames: string[] = [];
   addInProgress = false;
   cancelRequested = false;
   subscribeInProgress = false;
@@ -231,6 +234,8 @@ export class App implements AfterViewInit, OnInit, OnDestroy {
     this.chapterTemplate = this.cookieService.get('metube_chapter_template') || '';
     this.subtitleLanguage = this.cookieService.get('metube_subtitle_language') || 'en';
     this.subtitleMode = this.cookieService.get('metube_subtitle_mode') || 'prefer_manual';
+    this.ytdlOptionsPresets = this.loadYtdlOptionsPresetsFromCookie();
+    this.ytdlOptionsOverrides = this.cookieService.get('metube_ytdl_options_overrides') || '';
     const allowedDownloadTypes = new Set(this.downloadTypes.map(t => t.id));
     const allowedVideoCodecs = new Set(this.videoCodecs.map(c => c.id));
     if (!allowedDownloadTypes.has(this.downloadType)) {
@@ -287,6 +292,7 @@ export class App implements AfterViewInit, OnInit, OnDestroy {
     });
     this.getConfiguration();
     this.getYtdlOptionsUpdateTime();
+    this.getYtdlOptionPresets();
     this.customDirs$ = this.getMatchingCustomDir();
     this.setTheme(this.activeTheme!);
 
@@ -350,6 +356,10 @@ export class App implements AfterViewInit, OnInit, OnDestroy {
     return this.downloads.configuration['CUSTOM_DIRS'];
   }
 
+  allowYtdlOptionsOverrides() {
+    return this.downloads.configuration['ALLOW_YTDL_OPTIONS_OVERRIDES'] === true;
+  }
+
   allowCustomDir(tag: string) {
     if (this.downloads.configuration['CREATE_CUSTOM_DIRS']) {
       return tag;
@@ -415,6 +425,62 @@ export class App implements AfterViewInit, OnInit, OnDestroy {
     });
   }
 
+  getYtdlOptionPresets() {
+    this.downloads.getPresets().pipe(takeUntilDestroyed(this.destroyRef)).subscribe({
+      next: (data) => {
+        this.ytdlOptionPresetNames = Array.isArray(data?.presets)
+          ? data.presets.filter((preset): preset is string => typeof preset === 'string')
+          : [];
+        if (this.ytdlOptionsPresets?.length) {
+          const valid = new Set(this.ytdlOptionPresetNames);
+          const filtered = this.ytdlOptionsPresets.filter((p) => valid.has(p));
+          if (filtered.length !== this.ytdlOptionsPresets.length) {
+            this.ytdlOptionsPresets = filtered;
+            this.ytdlOptionsPresetsChanged();
+          }
+        }
+        this.cdr.markForCheck();
+      },
+    });
+  }
+
+  private loadYtdlOptionsPresetsFromCookie(): string[] {
+    const jsonCookie = this.cookieService.get('metube_ytdl_options_presets');
+    if (jsonCookie) {
+      try {
+        const parsed = JSON.parse(jsonCookie) as unknown;
+        if (Array.isArray(parsed)) {
+          return parsed.filter((p): p is string => typeof p === 'string' && p.length > 0);
+        }
+      } catch {
+        // fall through to legacy cookie
+      }
+    }
+    const legacy = this.cookieService.get('metube_ytdl_options_preset')?.trim();
+    return legacy ? [legacy] : [];
+  }
+
+  private validateYtdlOptionsOverrides(value: string): boolean {
+    if (!this.allowYtdlOptionsOverrides()) {
+      return true;
+    }
+    const trimmed = value?.trim() || '';
+    if (!trimmed) {
+      return true;
+    }
+    try {
+      const parsed = JSON.parse(trimmed);
+      if (!parsed || Array.isArray(parsed) || typeof parsed !== 'object') {
+        alert('Custom yt-dlp options must be a JSON object');
+        return false;
+      }
+    } catch {
+      alert('Custom yt-dlp options must be valid JSON');
+      return false;
+    }
+    return true;
+  }
+
   private rebuildCachedSubs() {
     this.cachedSubs = Array.from(this.subscriptionsSvc.subscriptions.entries());
     const validIds = new Set(this.cachedSubs.map(([id]) => id));
@@ -491,6 +557,9 @@ export class App implements AfterViewInit, OnInit, OnDestroy {
       alert('Chapter template must include %(section_number)');
       return;
     }
+    if (!this.validateYtdlOptionsOverrides(payload.ytdlOptionsOverrides)) {
+      return;
+    }
     this.subscribeInProgress = true;
     this.subscriptionsSvc
       .subscribe({
@@ -695,6 +764,18 @@ export class App implements AfterViewInit, OnInit, OnDestroy {
     this.saveSelection(this.downloadType);
   }
 
+  ytdlOptionsPresetsChanged() {
+    this.cookieService.set(
+      'metube_ytdl_options_presets',
+      JSON.stringify(this.ytdlOptionsPresets ?? []),
+      { expires: this.settingsCookieExpiryDays },
+    );
+  }
+
+  ytdlOptionsOverridesChanged() {
+    this.cookieService.set('metube_ytdl_options_overrides', this.ytdlOptionsOverrides, { expires: this.settingsCookieExpiryDays });
+  }
+
   isVideoType() {
     return this.downloadType === 'video';
   }
@@ -880,6 +961,7 @@ export class App implements AfterViewInit, OnInit, OnDestroy {
   }
 
   private buildAddPayload(overrides: Partial<AddDownloadPayload> = {}): AddDownloadPayload {
+    const allowYtdlOptionsOverrides = this.allowYtdlOptionsOverrides();
     return {
       url: overrides.url ?? this.addUrl,
       downloadType: overrides.downloadType ?? this.downloadType,
@@ -894,6 +976,10 @@ export class App implements AfterViewInit, OnInit, OnDestroy {
       chapterTemplate: overrides.chapterTemplate ?? this.chapterTemplate,
       subtitleLanguage: overrides.subtitleLanguage ?? this.subtitleLanguage,
       subtitleMode: overrides.subtitleMode ?? this.subtitleMode,
+      ytdlOptionsPresets: overrides.ytdlOptionsPresets ?? [...this.ytdlOptionsPresets],
+      ytdlOptionsOverrides: allowYtdlOptionsOverrides
+        ? (overrides.ytdlOptionsOverrides ?? this.ytdlOptionsOverrides)
+        : '',
     };
   }
 
@@ -905,6 +991,9 @@ export class App implements AfterViewInit, OnInit, OnDestroy {
       alert('Chapter template must include %(section_number)');
       return;
     }
+    if (!this.validateYtdlOptionsOverrides(payload.ytdlOptionsOverrides)) {
+      return;
+    }
 
     console.debug('Downloading:', payload);
     this.addInProgress = true;
@@ -960,6 +1049,10 @@ export class App implements AfterViewInit, OnInit, OnDestroy {
       chapterTemplate: download.chapter_template,
       subtitleLanguage: download.subtitle_language,
       subtitleMode: download.subtitle_mode,
+      ytdlOptionsPresets: download.ytdl_options_presets?.length
+        ? [...download.ytdl_options_presets]
+        : [],
+      ytdlOptionsOverrides: download.ytdl_options_overrides ? JSON.stringify(download.ytdl_options_overrides) : '',
     });
     this.downloads.delById('done', [key]).subscribe();
   }

ui/src/app/interfaces/download.ts

@@ -14,6 +14,8 @@ export interface Download {
   chapter_template?: string;
   subtitle_language?: string;
   subtitle_mode?: string;
+  ytdl_options_presets?: string[];
+  ytdl_options_overrides?: Record<string, unknown>;
   status: string;
   msg: string;
   percent: number;

ui/src/app/services/downloads.service.spec.ts

@@ -39,6 +39,8 @@ function basePayload(): AddDownloadPayload {
     chapterTemplate: '',
     subtitleLanguage: 'en',
     subtitleMode: 'prefer_manual',
+    ytdlOptionsPresets: [],
+    ytdlOptionsOverrides: '',
   };
 }
 
@@ -79,11 +81,22 @@ describe('DownloadsService', () => {
         chapter_template: '',
         subtitle_language: 'en',
         subtitle_mode: 'prefer_manual',
+        ytdl_options_presets: [],
+        ytdl_options_overrides: '',
       }),
     );
     req.flush({ status: 'ok' });
   });
 
+  it('getPresets() fetches configured preset names', () => {
+    service.getPresets().subscribe((result) => {
+      expect(result).toEqual({ presets: ['Preset A'] });
+    });
+    const req = httpMock.expectOne('presets');
+    expect(req.request.method).toBe('GET');
+    req.flush({ presets: ['Preset A'] });
+  });
+
   it('cancelAdd posts to cancel-add', () => {
     service.cancelAdd().subscribe();
     const req = httpMock.expectOne('cancel-add');

ui/src/app/services/downloads.service.ts

@@ -20,6 +20,8 @@ export interface AddDownloadPayload {
   chapterTemplate: string;
   subtitleLanguage: string;
   subtitleMode: string;
+  ytdlOptionsPresets: string[];
+  ytdlOptionsOverrides: string;
 }
 @Injectable({
   providedIn: 'root'
@@ -141,11 +143,19 @@ export class DownloadsService {
       chapter_template: payload.chapterTemplate,
       subtitle_language: payload.subtitleLanguage,
       subtitle_mode: payload.subtitleMode,
+      ytdl_options_presets: payload.ytdlOptionsPresets,
+      ytdl_options_overrides: payload.ytdlOptionsOverrides,
     }).pipe(
       catchError(this.handleHTTPError)
     );
   }
 
+  public getPresets() {
+    return this.http.get<{ presets: string[] }>('presets').pipe(
+      catchError(() => of({ presets: [] }))
+    );
+  }
+
   public startById(ids: string[]) {
     return this.http.post('start', {ids: ids});
   }

ui/src/app/services/subscriptions.service.ts

@@ -94,6 +94,8 @@ export class SubscriptionsService {
         chapter_template: payload.chapterTemplate,
         subtitle_language: payload.subtitleLanguage,
         subtitle_mode: payload.subtitleMode,
+        ytdl_options_presets: payload.ytdlOptionsPresets,
+        ytdl_options_overrides: payload.ytdlOptionsOverrides,
         check_interval_minutes: payload.checkIntervalMinutes,
       })
       .pipe(catchError((err) => this.handleHTTPError(err)));

uv.lock

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