diff --git a/src/workspaces/officerdev/src/apps/FileBrowser/FileBrowserApp/components/TaskRunnerModal.tsx b/src/workspaces/officerdev/src/apps/FileBrowser/FileBrowserApp/components/TaskRunnerModal.tsx
index 0d105e9f..4a8bd77e 100644
--- a/src/workspaces/officerdev/src/apps/FileBrowser/FileBrowserApp/components/TaskRunnerModal.tsx
+++ b/src/workspaces/officerdev/src/apps/FileBrowser/FileBrowserApp/components/TaskRunnerModal.tsx
@@ -12,6 +12,7 @@ import { useClient } from 'hooks/useClient';
 import type { TaskSummary } from '../../useTasks';
 import { useTaskRunner } from './useTaskRunner';
 import { usePipelineRunner } from './usePipelineRunner';
+import { useFilesAPI, type AudioTrack, type SubtitleTrack } from '../../../../hooks/useFilesAPI';
 
 const playDing = () => {
   const ctx = new AudioContext();
@@ -61,7 +62,7 @@ const PiMonoInner = ({ taskDirName, defaultInput, cwd, initialModel, taskInfo, s
   // Fetch task detail for inputs and body
   useEffect(() => {
     client.get<{ inputs?: Record<string, TaskInputDef>; body?: string }>(`/tasks/${taskDirName}`).then((task) => {
-      const defs = task.inputs ?? {};
+      const defs: Record<string, TaskInputDef> = task.inputs ?? {};
       setInputDefs(defs);
       setTaskBody(task.body ?? null);
       // Initialize from defaults and autofill
@@ -260,15 +261,67 @@ type TaskInputFormProps = {
   values: Record<string, string>;
   onChange: (key: string, value: string) => void;
   autoFilledKeys: Set<string>;
+  audioTracks?: AudioTrack[];
+  subtitleTracks?: SubtitleTrack[];
+  probing?: boolean;
+  entryType?: 'file' | 'directory';
 };
 
-const TaskInputForm = ({ inputDefs, values, onChange, autoFilledKeys }: TaskInputFormProps) => {
+const trackLabel = (t: { title: string; lang: string; id: number }) =>
+  t.title || (t.lang && t.lang !== 'und' && t.lang !== 'unknown' ? t.lang.toUpperCase() : '') || `Track ${t.id + 1}`;
+
+const TaskInputForm = ({ inputDefs, values, onChange, autoFilledKeys, audioTracks, subtitleTracks, probing, entryType }: TaskInputFormProps) => {
   const configurableInputs = Object.entries(inputDefs).filter(([key]) => !autoFilledKeys.has(key));
   if (configurableInputs.length === 0) return null;
 
   return (
     <div className="px-5 py-3 border-b border-duck-dark/10 flex flex-col gap-3">
       {configurableInputs.map(([key, def]) => {
+        if (def.type === 'audio_tracks' || def.type === 'subtitle_tracks') {
+          const isAudio = def.type === 'audio_tracks';
+          const tracks = (isAudio ? audioTracks : subtitleTracks) ?? [];
+          const selected = new Set(
+            (values[key] ?? '')
+              .split(',')
+              .filter(Boolean)
+              .map(Number)
+              .filter((n) => !Number.isNaN(n)),
+          );
+          const toggle = (id: number) => {
+            const next = new Set(selected);
+            if (next.has(id)) next.delete(id);
+            else next.add(id);
+            const ids = [...next].sort((a, b) => a - b);
+            onChange(key, ids.length > 0 ? ids.join(',') : 'none');
+          };
+          return (
+            <div key={key} className="flex flex-col gap-1.5">
+              <span className="text-sm font-medium text-duck-dark dark:text-foreground">{def.description ?? key}</span>
+              {entryType !== 'file' ? (
+                <span className="text-xs text-duck-dark/50 dark:text-foreground/50">All tracks kept (folder mode)</span>
+              ) : probing ? (
+                <span className="flex items-center gap-1.5 text-xs text-duck-dark/50 dark:text-foreground/50">
+                  <Loader2 className="h-3 w-3 animate-spin" /> Probing…
+                </span>
+              ) : tracks.length === 0 ? (
+                <span className="text-xs text-duck-dark/50 dark:text-foreground/50">None</span>
+              ) : (
+                <div className="flex flex-wrap gap-x-3 gap-y-1.5">
+                  {tracks.map((t) => (
+                    <label key={t.id} className="flex items-center gap-1.5 text-sm cursor-pointer text-duck-dark dark:text-foreground">
+                      <input type="checkbox" checked={selected.has(t.id)} onChange={() => toggle(t.id)} className="accent-duck-teal cursor-pointer" />
+                      <span className="whitespace-nowrap">
+                        {trackLabel(t)}
+                        {isAudio && <span className="text-duck-dark/40 dark:text-foreground/40"> · {(t as AudioTrack).channels}ch</span>}
+                      </span>
+                    </label>
+                  ))}
+                </div>
+              )}
+            </div>
+          );
+        }
+
         if (def.type === 'boolean') {
           const isTrue = values[key] === 'true';
           return (
@@ -338,19 +391,25 @@ type ScriptRunnerProps = {
   autoInputs: Record<string, string>;
   context: Record<string, string>;
   cwd?: string;
+  entryType?: 'file' | 'directory';
+  filePath?: string;
 };
 
-const ScriptRunner = ({ taskDirName, autoInputs, context, cwd }: ScriptRunnerProps) => {
+const ScriptRunner = ({ taskDirName, autoInputs, context, cwd, entryType, filePath }: ScriptRunnerProps) => {
   const runner = useTaskRunner();
   const client = useClient();
+  const files = useFilesAPI('home');
   const bottomRef = useRef<HTMLDivElement | null>(null);
   const [inputDefs, setInputDefs] = useState<Record<string, TaskInputDef> | null>(null);
   const [formValues, setFormValues] = useState<Record<string, string>>({});
+  const [audioTracks, setAudioTracks] = useState<AudioTrack[]>([]);
+  const [subtitleTracks, setSubtitleTracks] = useState<SubtitleTrack[]>([]);
+  const [probing, setProbing] = useState(false);
 
   // Fetch task detail to get input definitions
   useEffect(() => {
     client.get<{ inputs?: Record<string, TaskInputDef> }>(`/tasks/${taskDirName}`).then((task) => {
-      const defs = task.inputs ?? {};
+      const defs: Record<string, TaskInputDef> = task.inputs ?? {};
       setInputDefs(defs);
       // Initialize from autofill context, then defaults
       const initial: Record<string, string> = {};
@@ -359,6 +418,30 @@ const ScriptRunner = ({ taskDirName, autoInputs, context, cwd }: ScriptRunnerPro
         else if (def.default !== undefined) initial[key] = def.default;
       }
       setFormValues(initial);
+
+      // If the task has track pickers and we're on a single file, probe it and seed keep-all.
+      const hasAudio = Object.values(defs).some((d) => d.type === 'audio_tracks');
+      const hasSubs = Object.values(defs).some((d) => d.type === 'subtitle_tracks');
+      if ((hasAudio || hasSubs) && entryType === 'file' && filePath) {
+        setProbing(true);
+        Promise.all([
+          hasAudio ? files.audioTracks(filePath).catch(() => [] as AudioTrack[]) : Promise.resolve([] as AudioTrack[]),
+          hasSubs ? files.subtitles(filePath).catch(() => [] as SubtitleTrack[]) : Promise.resolve([] as SubtitleTrack[]),
+        ])
+          .then(([aud, sub]: [AudioTrack[], SubtitleTrack[]]) => {
+            setAudioTracks(aud);
+            setSubtitleTracks(sub);
+            setFormValues((prev) => {
+              const next = { ...prev };
+              for (const [key, def] of Object.entries(defs)) {
+                if (def.type === 'audio_tracks') next[key] = aud.map((t) => t.id).join(',') || 'none';
+                if (def.type === 'subtitle_tracks') next[key] = 'none';
+              }
+              return next;
+            });
+          })
+          .finally(() => setProbing(false));
+      }
     });
   }, [taskDirName]);
 
@@ -404,12 +487,16 @@ const ScriptRunner = ({ taskDirName, autoInputs, context, cwd }: ScriptRunnerPro
             values={formValues}
             onChange={handleInputChange}
             autoFilledKeys={autoFilledKeys}
+            audioTracks={audioTracks}
+            subtitleTracks={subtitleTracks}
+            probing={probing}
+            entryType={entryType}
           />
         )}
         <div className="flex-1 flex items-center justify-center">
           <button
             onClick={handleRun}
-            disabled={!runner.isConnected || !inputDefs}
+            disabled={!runner.isConnected || !inputDefs || probing}
             className="flex items-center gap-2 px-6 py-2.5 rounded-lg bg-duck-teal text-white font-medium text-sm hover:bg-duck-teal/90 transition-colors disabled:opacity-50 disabled:cursor-not-allowed cursor-pointer"
           >
             <Play className="h-4 w-4" />
@@ -867,6 +954,8 @@ export const TaskRunnerModal = ({ open, onOpenChange, task, entryName, entryFull
               autoInputs={autoInputs}
               context={autofillContext}
               cwd={cwd.path || undefined}
+              entryType={entryType}
+              filePath={entryName ? (cwd.path ? `${cwd.path}/${entryName}` : entryName) : undefined}
             />
           ) : (
             <PiMonoInner
diff --git a/src/workspaces/officerdev/src/hooks/useFilesAPI.ts b/src/workspaces/officerdev/src/hooks/useFilesAPI.ts
index 52f4ca12..be8f6857 100644
--- a/src/workspaces/officerdev/src/hooks/useFilesAPI.ts
+++ b/src/workspaces/officerdev/src/hooks/useFilesAPI.ts
@@ -69,6 +69,12 @@ export const useFilesAPI = (root: string = 'home') => {
     saveResult: (path: string) =>
       client.post<{ savedPath: string }>('/file-browser/save-result', { path }),
 
+    audioTracks: (path: string) =>
+      client.get<AudioTrack[]>(withRoot(`/file-browser/audio-tracks?path=${encodeURIComponent(path)}`)),
+
+    subtitles: (path: string) =>
+      client.get<SubtitleTrack[]>(withRoot(`/file-browser/subtitles?path=${encodeURIComponent(path)}`)),
+
     getRawUrl: (path: string) => {
       const token = getHeaders()['Authorization']?.replace('Bearer ', '') ?? '';
       const rp = root !== 'home' ? `&root=${encodeURIComponent(root)}` : '';
@@ -130,6 +136,9 @@ export type UseFilesAPIType = ReturnType<typeof useFilesAPI>;
 
 // ── Types ──
 
+export type AudioTrack = { id: number; codec: string; channels: number; lang: string; title: string };
+export type SubtitleTrack = { id: number; codec: string; lang: string; title: string };
+
 export type DirEntry = {
   name: string;
   path?: string;