Add Windows mpv executable path override

changes/272-windows-mpv-executable-path.md

@@ -0,0 +1,5 @@
+type: fixed
+area: launcher
+
+- Added a blank-by-default `mpv.executablePath` override for Windows playback so users can point SubMiner at `mpv.exe` when it is not on `PATH`.
+- Kept the Windows shortcut and `--launch-mpv` flow simple by preserving PATH auto-discovery as the default and exposing the override in first-run setup.

config.example.jsonc

@@ -458,6 +458,15 @@
     "externalProfilePath": "" // Optional external Yomitan Electron profile path to use in read-only mode for shared dictionaries/settings. Example: ~/.config/gsm_overlay
   }, // Optional external Yomitan profile integration.
 
+  // ==========================================
+  // MPV Launcher
+  // Optional mpv.exe override for Windows playback entry points.
+  // Leave mpv.executablePath blank to auto-discover mpv.exe from SUBMINER_MPV_PATH or PATH.
+  // ==========================================
+  "mpv": {
+    "executablePath": "" // Optional absolute path to mpv.exe for Windows launch flows. Leave empty to auto-discover from SUBMINER_MPV_PATH or PATH.
+  }, // Optional mpv.exe override for Windows playback entry points.
+
   // ==========================================
   // Jellyfin
   // Optional Jellyfin integration for auth, browsing, and playback launch.

docs-site/installation.md

@@ -23,7 +23,7 @@
 
 **macOS** — macOS 10.13 or later. Accessibility permission required for window tracking.
 
-**Windows** — Windows 10 or later. Install `mpv` and keep it available on `PATH`; SubMiner's packaged build handles window tracking directly.
+**Windows** — Windows 10 or later. Install `mpv`; keep it on `PATH` for auto-discovery or set `mpv.executablePath` in config if `mpv.exe` lives elsewhere. SubMiner's packaged build handles window tracking directly.
 
 ### Optional Tools
 
@@ -172,6 +172,7 @@ Install `mpv` separately and ensure `mpv.exe` is on `PATH`. `ffmpeg` is still re
 ### Windows Usage Notes
 
 - Launch `SubMiner.exe` once to let the first-run setup flow seed `%APPDATA%\\SubMiner\\config.jsonc`, require mpv plugin installation, and open bundled Yomitan settings. The optional `SubMiner mpv` Start Menu/Desktop shortcut can also be created during setup, and on Windows it is the recommended way to launch mpv playback with SubMiner defaults.
+- If `mpv.exe` is not on `PATH`, set `mpv.executablePath` in `config.jsonc` or use the first-run setup field to point at the executable. Leave it blank to keep PATH auto-discovery.
 - `SubMiner.exe --launch-mpv` and the optional `SubMiner mpv` shortcut pass SubMiner's default mpv socket/subtitle args directly and do not require an `mpv.conf` profile named `subminer`.
 - First-run mpv plugin installs pin `binary_path` to the current `SubMiner.exe` automatically. Manual plugin configs can leave `binary_path` empty unless SubMiner is installed in a non-standard location.
 - Windows plugin installs rewrite `socket_path` to `\\.\pipe\subminer-socket`; do not keep `/tmp/subminer-socket` on Windows.

docs-site/public/config.example.jsonc

@@ -458,6 +458,15 @@
     "externalProfilePath": "" // Optional external Yomitan Electron profile path to use in read-only mode for shared dictionaries/settings. Example: ~/.config/gsm_overlay
   }, // Optional external Yomitan profile integration.
 
+  // ==========================================
+  // MPV Launcher
+  // Optional mpv.exe override for Windows playback entry points.
+  // Leave mpv.executablePath blank to auto-discover mpv.exe from SUBMINER_MPV_PATH or PATH.
+  // ==========================================
+  "mpv": {
+    "executablePath": "" // Optional absolute path to mpv.exe for Windows launch flows. Leave empty to auto-discover from SUBMINER_MPV_PATH or PATH.
+  }, // Optional mpv.exe override for Windows playback entry points.
+
   // ==========================================
   // Jellyfin
   // Optional Jellyfin integration for auth, browsing, and playback launch.

docs-site/usage.md

@@ -133,7 +133,7 @@ You can use it three ways:
 & "C:\Program Files\SubMiner\SubMiner.exe" --launch-mpv "C:\Videos\episode 01.mkv"
 ```
 
-This flow requires `mpv.exe` to be on `PATH`. If it is installed elsewhere, set `SUBMINER_MPV_PATH` to the full `mpv.exe` path before launching. On Windows, `--launch-mpv` does not require an `mpv.conf` profile named `subminer`.
+This flow requires `mpv.exe` to be discoverable. Leave `mpv.executablePath` blank to auto-discover from `PATH`, or set it to the full `mpv.exe` path if mpv is installed elsewhere. `SUBMINER_MPV_PATH` is still honored as a fallback. On Windows, `--launch-mpv` does not require an `mpv.conf` profile named `subminer`.
 
 ### Launcher Subcommands
 
@@ -164,6 +164,7 @@ Setup flow:
 - Yomitan shortcut: open bundled Yomitan settings directly from the setup window
 - dictionary check: ensure at least one bundled Yomitan dictionary is available, unless an external Yomitan profile is configured
 - Windows: optionally create or remove `SubMiner mpv` Start Menu/Desktop shortcuts (`SubMiner.exe --launch-mpv`)
+- Windows: optionally set `mpv.executablePath` if `mpv.exe` is not on `PATH`
 - refresh: re-check plugin + dictionary state without restarting
 - `Finish setup` stays disabled until the config, plugin, and dictionary gates are satisfied
 - finish action writes setup completion state and suppresses future auto-open prompts

package.json

@@ -38,8 +38,8 @@
     "docs:preview": "bun run --cwd docs-site docs:preview",
     "docs:test": "bun run --cwd docs-site test",
     "test:docs:kb": "bun test scripts/docs-knowledge-base.test.ts",
-    "test:config:src": "bun test src/config/config.test.ts src/config/path-resolution.test.ts src/config/resolve/anki-connect.test.ts src/config/resolve/subtitle-style.test.ts src/config/resolve/jellyfin.test.ts src/config/definitions/domain-registry.test.ts src/generate-config-example.test.ts src/verify-config-example.test.ts",
-    "test:config:dist": "bun test dist/config/config.test.js dist/config/path-resolution.test.js dist/config/resolve/anki-connect.test.js dist/config/resolve/subtitle-style.test.js dist/config/resolve/jellyfin.test.js dist/config/definitions/domain-registry.test.js dist/generate-config-example.test.js dist/verify-config-example.test.js",
+    "test:config:src": "bun test src/config/config.test.ts src/config/path-resolution.test.ts src/config/resolve/anki-connect.test.ts src/config/resolve/integrations.test.ts src/config/resolve/subtitle-style.test.ts src/config/resolve/jellyfin.test.ts src/config/definitions/domain-registry.test.ts src/generate-config-example.test.ts src/verify-config-example.test.ts",
+    "test:config:dist": "bun test dist/config/config.test.js dist/config/path-resolution.test.js dist/config/resolve/anki-connect.test.js dist/config/resolve/integrations.test.js dist/config/resolve/subtitle-style.test.js dist/config/resolve/jellyfin.test.js dist/config/definitions/domain-registry.test.js dist/generate-config-example.test.js dist/verify-config-example.test.js",
     "test:config:smoke:dist": "bun test dist/config/path-resolution.test.js",
     "test:plugin:src": "lua scripts/test-plugin-start-gate.lua && lua scripts/test-plugin-binary-windows.lua",
     "test:launcher:smoke:src": "bun test launcher/smoke.e2e.test.ts",

src/config/definitions.ts

@@ -35,8 +35,17 @@ const {
   startupWarmups,
   auto_start_overlay,
 } = CORE_DEFAULT_CONFIG;
-const { ankiConnect, jimaku, anilist, yomitan, jellyfin, discordPresence, ai, youtubeSubgen } =
-  INTEGRATIONS_DEFAULT_CONFIG;
+const {
+  ankiConnect,
+  jimaku,
+  anilist,
+  mpv,
+  yomitan,
+  jellyfin,
+  discordPresence,
+  ai,
+  youtubeSubgen,
+} = INTEGRATIONS_DEFAULT_CONFIG;
 const { subtitleStyle, subtitleSidebar } = SUBTITLE_DEFAULT_CONFIG;
 const { immersionTracking } = IMMERSION_DEFAULT_CONFIG;
 const { stats } = STATS_DEFAULT_CONFIG;
@@ -60,6 +69,7 @@ export const DEFAULT_CONFIG: ResolvedConfig = {
   auto_start_overlay,
   jimaku,
   anilist,
+  mpv,
   yomitan,
   jellyfin,
   discordPresence,

src/config/definitions/defaults-integrations.ts

@@ -5,6 +5,7 @@ export const INTEGRATIONS_DEFAULT_CONFIG: Pick<
   | 'ankiConnect'
   | 'jimaku'
   | 'anilist'
+  | 'mpv'
   | 'yomitan'
   | 'jellyfin'
   | 'discordPresence'
@@ -90,6 +91,9 @@ export const INTEGRATIONS_DEFAULT_CONFIG: Pick<
     languagePreference: 'ja',
     maxEntryResults: 10,
   },
+  mpv: {
+    executablePath: '',
+  },
   anilist: {
     enabled: false,
     accessToken: '',

src/config/definitions/domain-registry.test.ts

@@ -28,6 +28,7 @@ test('config option registry includes critical paths and has unique entries', ()
     'ankiConnect.enabled',
     'anilist.characterDictionary.enabled',
     'anilist.characterDictionary.collapsibleSections.description',
+    'mpv.executablePath',
     'yomitan.externalProfilePath',
     'immersionTracking.enabled',
   ]) {
@@ -48,6 +49,7 @@ test('config template sections include expected domains and unique keys', () =>
     'subtitleStyle',
     'ankiConnect',
     'yomitan',
+    'mpv',
     'immersionTracking',
   ];
 

src/config/definitions/options-integrations.ts

@@ -238,6 +238,13 @@ export function buildIntegrationConfigOptionRegistry(
       description:
         'Optional external Yomitan Electron profile path to use in read-only mode for shared dictionaries/settings. Example: ~/.config/gsm_overlay',
     },
+    {
+      path: 'mpv.executablePath',
+      kind: 'string',
+      defaultValue: defaultConfig.mpv.executablePath,
+      description:
+        'Optional absolute path to mpv.exe for Windows launch flows. Leave empty to auto-discover from SUBMINER_MPV_PATH or PATH.',
+    },
     {
       path: 'jellyfin.enabled',
       kind: 'boolean',

src/config/definitions/template-sections.ts

@@ -153,6 +153,14 @@ const INTEGRATION_TEMPLATE_SECTIONS: ConfigTemplateSection[] = [
     ],
     key: 'yomitan',
   },
+  {
+    title: 'MPV Launcher',
+    description: [
+      'Optional mpv.exe override for Windows playback entry points.',
+      'Leave mpv.executablePath blank to auto-discover mpv.exe from SUBMINER_MPV_PATH or PATH.',
+    ],
+    key: 'mpv',
+  },
   {
     title: 'Jellyfin',
     description: [

src/config/resolve/integrations.test.ts

@@ -0,0 +1,31 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { resolveConfig } from '../resolve';
+
+test('resolveConfig trims configured mpv executable path', () => {
+  const { resolved, warnings } = resolveConfig({
+    mpv: {
+      executablePath: '  C:\\Program Files\\mpv\\mpv.exe  ',
+    },
+  });
+
+  assert.equal(resolved.mpv.executablePath, 'C:\\Program Files\\mpv\\mpv.exe');
+  assert.deepEqual(warnings, []);
+});
+
+test('resolveConfig warns for invalid mpv executable path type', () => {
+  const { resolved, warnings } = resolveConfig({
+    mpv: {
+      executablePath: 42 as never,
+    },
+  });
+
+  assert.equal(resolved.mpv.executablePath, '');
+  assert.equal(warnings.length, 1);
+  assert.deepEqual(warnings[0], {
+    path: 'mpv.executablePath',
+    value: 42,
+    fallback: '',
+    message: 'Expected string.',
+  });
+});

src/config/resolve/integrations.ts

@@ -228,6 +228,22 @@ export function applyIntegrationConfig(context: ResolveContext): void {
     warn('yomitan', src.yomitan, resolved.yomitan, 'Expected object.');
   }
 
+  if (isObject(src.mpv)) {
+    const executablePath = asString(src.mpv.executablePath);
+    if (executablePath !== undefined) {
+      resolved.mpv.executablePath = executablePath.trim();
+    } else if (src.mpv.executablePath !== undefined) {
+      warn(
+        'mpv.executablePath',
+        src.mpv.executablePath,
+        resolved.mpv.executablePath,
+        'Expected string.',
+      );
+    }
+  } else if (src.mpv !== undefined) {
+    warn('mpv', src.mpv, resolved.mpv, 'Expected object.');
+  }
+
   if (isObject(src.jellyfin)) {
     const enabled = asBoolean(src.jellyfin.enabled);
     if (enabled !== undefined) {

src/main-entry.ts

@@ -2,6 +2,7 @@ import path from 'node:path';
 import { spawn } from 'node:child_process';
 import { app, dialog } from 'electron';
 import { printHelp } from './cli/help';
+import { loadRawConfigStrict } from './config/load';
 import {
   configureEarlyAppPaths,
   normalizeLaunchMpvExtraArgs,
@@ -35,6 +36,21 @@ function applySanitizedEnv(sanitizedEnv: NodeJS.ProcessEnv): void {
   }
 }
 
+function readConfiguredWindowsMpvExecutablePath(configDir: string): string {
+  const loadResult = loadRawConfigStrict({
+    configDir,
+    configFileJsonc: path.join(configDir, 'config.jsonc'),
+    configFileJson: path.join(configDir, 'config.json'),
+  });
+  if (!loadResult.ok) {
+    return '';
+  }
+
+  return typeof loadResult.config.mpv?.executablePath === 'string'
+    ? loadResult.config.mpv.executablePath.trim()
+    : '';
+}
+
 function resolveBundledWindowsMpvPluginEntrypoint(): string | undefined {
   const assets = resolvePackagedFirstRunPluginAssets({
     dirname: __dirname,
@@ -50,7 +66,7 @@ function resolveBundledWindowsMpvPluginEntrypoint(): string | undefined {
 
 process.argv = normalizeStartupArgv(process.argv, process.env);
 applySanitizedEnv(sanitizeStartupEnv(process.env));
-configureEarlyAppPaths(app);
+const userDataPath = configureEarlyAppPaths(app);
 
 if (shouldDetachBackgroundLaunch(process.argv, process.env)) {
   const child = spawn(process.execPath, process.argv.slice(1), {
@@ -87,6 +103,7 @@ if (shouldHandleLaunchMpvAtEntry(process.argv, process.env)) {
       normalizeLaunchMpvExtraArgs(process.argv),
       process.execPath,
       resolveBundledWindowsMpvPluginEntrypoint(),
+      readConfiguredWindowsMpvExecutablePath(userDataPath),
     );
     app.exit(result.ok ? 0 : 1);
   });

src/main.ts

@@ -1037,6 +1037,9 @@ const youtubePlaybackRuntime = createYoutubePlaybackRuntime({
         showError: (title, content) => dialog.showErrorBox(title, content),
       }),
       [...args, `--log-file=${DEFAULT_MPV_LOG_PATH}`],
+      undefined,
+      undefined,
+      getResolvedConfig().mpv.executablePath,
     ),
   waitForYoutubeMpvConnected: (timeoutMs) => waitForYoutubeMpvConnected(timeoutMs),
   prepareYoutubePlaybackInMpv: (request) => prepareYoutubePlaybackInMpv(request),
@@ -2220,6 +2223,7 @@ const openFirstRunSetupWindowHandler = createOpenFirstRunSetupWindowHandler({
       externalYomitanConfigured: snapshot.externalYomitanConfigured,
       pluginStatus: snapshot.pluginStatus,
       pluginInstallPathSummary: snapshot.pluginInstallPathSummary,
+      mpvExecutablePath: getResolvedConfig().mpv.executablePath,
       windowsMpvShortcuts: snapshot.windowsMpvShortcuts,
       message: firstRunSetupMessage,
     };
@@ -2232,6 +2236,18 @@ const openFirstRunSetupWindowHandler = createOpenFirstRunSetupWindowHandler({
       firstRunSetupMessage = snapshot.message;
       return;
     }
+    if (submission.action === 'configure-mpv-executable-path') {
+      const mpvExecutablePath = submission.mpvExecutablePath?.trim() ?? '';
+      configService.patchRawConfig({
+        mpv: {
+          executablePath: mpvExecutablePath,
+        },
+      });
+      firstRunSetupMessage = mpvExecutablePath
+        ? `Saved mpv executable path: ${mpvExecutablePath}`
+        : 'Cleared mpv executable path. SubMiner will auto-discover mpv.exe from PATH.';
+      return;
+    }
     if (submission.action === 'configure-windows-mpv-shortcuts') {
       const snapshot = await firstRunSetupService.configureWindowsMpvShortcuts({
         startMenuEnabled: submission.startMenuEnabled === true,

src/main/runtime/first-run-setup-window.test.ts

@@ -16,6 +16,7 @@ test('buildFirstRunSetupHtml renders macchiato setup actions and disabled finish
     externalYomitanConfigured: false,
     pluginStatus: 'required',
     pluginInstallPathSummary: null,
+    mpvExecutablePath: '',
     windowsMpvShortcuts: {
       supported: false,
       startMenuEnabled: true,
@@ -43,6 +44,7 @@ test('buildFirstRunSetupHtml switches plugin action to reinstall when already in
     externalYomitanConfigured: false,
     pluginStatus: 'installed',
     pluginInstallPathSummary: '/tmp/mpv',
+    mpvExecutablePath: 'C:\\Program Files\\mpv\\mpv.exe',
     windowsMpvShortcuts: {
       supported: true,
       startMenuEnabled: true,
@@ -55,6 +57,8 @@ test('buildFirstRunSetupHtml switches plugin action to reinstall when already in
   });
 
   assert.match(html, /Reinstall mpv plugin/);
+  assert.match(html, /mpv executable path/);
+  assert.match(html, /Leave blank to auto-discover mpv\.exe from PATH\./);
   assert.match(
     html,
     /Finish stays unlocked once the mpv plugin is installed and Yomitan reports at least one installed dictionary\./,
@@ -69,6 +73,7 @@ test('buildFirstRunSetupHtml explains the config blocker when setup is missing c
     externalYomitanConfigured: false,
     pluginStatus: 'required',
     pluginInstallPathSummary: null,
+    mpvExecutablePath: '',
     windowsMpvShortcuts: {
       supported: false,
       startMenuEnabled: true,
@@ -91,6 +96,7 @@ test('buildFirstRunSetupHtml explains external yomitan mode and keeps finish ena
     externalYomitanConfigured: true,
     pluginStatus: 'installed',
     pluginInstallPathSummary: null,
+    mpvExecutablePath: '',
     windowsMpvShortcuts: {
       supported: false,
       startMenuEnabled: true,
@@ -107,6 +113,15 @@ test('buildFirstRunSetupHtml explains external yomitan mode and keeps finish ena
 });
 
 test('parseFirstRunSetupSubmissionUrl parses supported custom actions', () => {
+  assert.deepEqual(
+    parseFirstRunSetupSubmissionUrl(
+      'subminer://first-run-setup?action=configure-mpv-executable-path&mpvExecutablePath=C%3A%5CApps%5Cmpv%5Cmpv.exe',
+    ),
+    {
+      action: 'configure-mpv-executable-path',
+      mpvExecutablePath: 'C:\\Apps\\mpv\\mpv.exe',
+    },
+  );
   assert.deepEqual(parseFirstRunSetupSubmissionUrl('subminer://first-run-setup?action=refresh'), {
     action: 'refresh',
   });
@@ -192,6 +207,7 @@ test('closing incomplete first-run setup quits app outside background mode', asy
       externalYomitanConfigured: false,
       pluginStatus: 'required',
       pluginInstallPathSummary: null,
+      mpvExecutablePath: '',
       windowsMpvShortcuts: {
         supported: false,
         startMenuEnabled: true,

src/main/runtime/first-run-setup-window.ts

@@ -17,6 +17,7 @@ type FirstRunSetupWindowLike = FocusableWindowLike & {
 };
 
 export type FirstRunSetupAction =
+  | 'configure-mpv-executable-path'
   | 'install-plugin'
   | 'configure-windows-mpv-shortcuts'
   | 'open-yomitan-settings'
@@ -25,6 +26,7 @@ export type FirstRunSetupAction =
 
 export interface FirstRunSetupSubmission {
   action: FirstRunSetupAction;
+  mpvExecutablePath?: string;
   startMenuEnabled?: boolean;
   desktopEnabled?: boolean;
 }
@@ -36,6 +38,7 @@ export interface FirstRunSetupHtmlModel {
   externalYomitanConfigured: boolean;
   pluginStatus: 'installed' | 'required' | 'failed';
   pluginInstallPathSummary: string | null;
+  mpvExecutablePath: string;
   windowsMpvShortcuts: {
     supported: boolean;
     startMenuEnabled: boolean;
@@ -90,6 +93,34 @@ export function buildFirstRunSetupHtml(model: FirstRunSetupHtmlModel): string {
         : model.windowsMpvShortcuts.status === 'skipped'
           ? 'muted'
           : 'warn';
+  const mpvExecutablePathLabel =
+    model.mpvExecutablePath.trim().length > 0 ? 'Configured' : 'Blank';
+  const mpvExecutablePathTone = model.mpvExecutablePath.trim().length > 0 ? 'ready' : 'muted';
+  const mpvExecutablePathCard = model.windowsMpvShortcuts.supported
+    ? `
+    <div class="card block">
+      <div class="card-head">
+        <div>
+          <strong>mpv executable path</strong>
+          <div class="meta">Leave blank to auto-discover mpv.exe from PATH.</div>
+          <div class="meta">Current: ${escapeHtml(model.mpvExecutablePath.trim().length > 0 ? model.mpvExecutablePath : 'blank (PATH discovery)')}</div>
+        </div>
+        ${renderStatusBadge(mpvExecutablePathLabel, mpvExecutablePathTone)}
+      </div>
+      <form
+        class="path-form"
+        onsubmit="event.preventDefault(); const params = new URLSearchParams({ action: 'configure-mpv-executable-path', mpvExecutablePath: document.getElementById('mpv-executable-path').value }); window.location.href = 'subminer://first-run-setup?' + params.toString();"
+      >
+        <input
+          id="mpv-executable-path"
+          type="text"
+          value="${escapeHtml(model.mpvExecutablePath)}"
+          placeholder="C:\\Program Files\\mpv\\mpv.exe"
+        />
+        <button type="submit">Save mpv executable path</button>
+      </form>
+    </div>`
+    : '';
   const windowsShortcutCard = model.windowsMpvShortcuts.supported
     ? `
     <div class="card block">
@@ -218,6 +249,24 @@ export function buildFirstRunSetupHtml(model: FirstRunSetupHtmlModel): string {
     .badge.warn { background: rgba(238, 212, 159, 0.18); color: var(--yellow); }
     .badge.muted { background: rgba(184, 192, 224, 0.12); color: var(--muted); }
     .badge.danger { background: rgba(237, 135, 150, 0.16); color: var(--red); }
+    .path-form {
+      display: grid;
+      gap: 8px;
+      margin-top: 12px;
+    }
+    .path-form input[type='text'] {
+      width: 100%;
+      box-sizing: border-box;
+      border: 1px solid rgba(202, 211, 245, 0.12);
+      border-radius: 10px;
+      padding: 9px 10px;
+      color: var(--text);
+      background: rgba(30, 32, 48, 0.72);
+      font: inherit;
+    }
+    .path-form input[type='text']::placeholder {
+      color: rgba(184, 192, 224, 0.65);
+    }
     .actions {
       display: grid;
       grid-template-columns: 1fr 1fr;
@@ -282,6 +331,7 @@ export function buildFirstRunSetupHtml(model: FirstRunSetupHtmlModel): string {
       </div>
       ${renderStatusBadge(yomitanBadgeLabel, yomitanBadgeTone)}
     </div>
+    ${mpvExecutablePathCard}
     ${windowsShortcutCard}
     <div class="actions">
       <button onclick="window.location.href='subminer://first-run-setup?action=install-plugin'">${pluginActionLabel}</button>
@@ -303,6 +353,7 @@ export function parseFirstRunSetupSubmissionUrl(rawUrl: string): FirstRunSetupSu
   const parsed = new URL(rawUrl);
   const action = parsed.searchParams.get('action');
   if (
+    action !== 'configure-mpv-executable-path' &&
     action !== 'install-plugin' &&
     action !== 'configure-windows-mpv-shortcuts' &&
     action !== 'open-yomitan-settings' &&
@@ -311,6 +362,12 @@ export function parseFirstRunSetupSubmissionUrl(rawUrl: string): FirstRunSetupSu
   ) {
     return null;
   }
+  if (action === 'configure-mpv-executable-path') {
+    return {
+      action,
+      mpvExecutablePath: parsed.searchParams.get('mpvExecutablePath') ?? '',
+    };
+  }
   if (action === 'configure-windows-mpv-shortcuts') {
     return {
       action,

src/main/runtime/windows-mpv-launch.test.ts

@@ -29,6 +29,19 @@ test('resolveWindowsMpvPath prefers SUBMINER_MPV_PATH', () => {
   assert.equal(resolved, 'C:\\mpv\\mpv.exe');
 });
 
+test('resolveWindowsMpvPath prefers configured executable path before PATH', () => {
+  const resolved = resolveWindowsMpvPath(
+    createDeps({
+      getEnv: () => undefined,
+      runWhere: () => ({ status: 0, stdout: 'C:\\tools\\mpv.exe\r\n' }),
+      fileExists: (candidate) => candidate === 'C:\\mpv\\mpv.exe',
+    }),
+    '  C:\\mpv\\mpv.exe  ',
+  );
+
+  assert.equal(resolved, 'C:\\mpv\\mpv.exe');
+});
+
 test('resolveWindowsMpvPath falls back to where.exe output', () => {
   const resolved = resolveWindowsMpvPath(
     createDeps({
@@ -132,7 +145,7 @@ test('launchWindowsMpv reports missing mpv path', () => {
 
   assert.equal(result.ok, false);
   assert.equal(result.mpvPath, '');
-  assert.match(errors[0] ?? '', /Could not find mpv\.exe/i);
+  assert.match(errors[0] ?? '', /mpv\.executablePath/i);
 });
 
 test('launchWindowsMpv spawns detached mpv with targets', () => {

src/main/runtime/windows-mpv-launch.ts

@@ -13,7 +13,15 @@ function normalizeCandidate(candidate: string | undefined): string {
   return typeof candidate === 'string' ? candidate.trim() : '';
 }
 
-export function resolveWindowsMpvPath(deps: WindowsMpvLaunchDeps): string {
+export function resolveWindowsMpvPath(
+  deps: WindowsMpvLaunchDeps,
+  configuredMpvPath = '',
+): string {
+  const configPath = normalizeCandidate(configuredMpvPath);
+  if (configPath && deps.fileExists(configPath)) {
+    return configPath;
+  }
+
   const envPath = normalizeCandidate(deps.getEnv('SUBMINER_MPV_PATH'));
   if (envPath && deps.fileExists(envPath)) {
     return envPath;
@@ -97,12 +105,13 @@ export function launchWindowsMpv(
   extraArgs: string[] = [],
   binaryPath?: string,
   pluginEntrypointPath?: string,
+  configuredMpvPath?: string,
 ): { ok: boolean; mpvPath: string } {
-  const mpvPath = resolveWindowsMpvPath(deps);
+  const mpvPath = resolveWindowsMpvPath(deps, configuredMpvPath);
   if (!mpvPath) {
     deps.showError(
       'SubMiner mpv launcher',
-      'Could not find mpv.exe. Install mpv and add it to PATH, or set SUBMINER_MPV_PATH.',
+      'Could not find mpv.exe. Set mpv.executablePath, set SUBMINER_MPV_PATH, or add mpv.exe to PATH.',
     );
     return { ok: false, mpvPath: '' };
   }

src/types/config.ts

@@ -50,6 +50,10 @@ export interface TexthookerConfig {
   openBrowser?: boolean;
 }
 
+export interface MpvConfig {
+  executablePath?: string;
+}
+
 export type SubsyncMode = 'auto' | 'manual';
 
 export interface SubsyncConfig {
@@ -90,6 +94,7 @@ export interface Config {
   websocket?: WebSocketConfig;
   annotationWebsocket?: AnnotationWebSocketConfig;
   texthooker?: TexthookerConfig;
+  mpv?: MpvConfig;
   controller?: ControllerConfig;
   ankiConnect?: AnkiConnectConfig;
   shortcuts?: ShortcutsConfig;
@@ -122,6 +127,9 @@ export interface ResolvedConfig {
   websocket: Required<WebSocketConfig>;
   annotationWebsocket: Required<AnnotationWebSocketConfig>;
   texthooker: Required<TexthookerConfig>;
+  mpv: {
+    executablePath: string;
+  };
   controller: {
     enabled: boolean;
     preferredGamepadId: string;