diff --git a/src/main/lib/subscription-scheduler.ts b/src/main/lib/subscription-scheduler.ts
index a7a9e79..66e5588 100644
--- a/src/main/lib/subscription-scheduler.ts
+++ b/src/main/lib/subscription-scheduler.ts
@@ -4,6 +4,10 @@ import log from 'electron-log/main'
 import Parser from 'rss-parser'
 import type { SubscriptionFeedItem, SubscriptionRule } from '../../shared/types'
 import { DEFAULT_SUBSCRIPTION_FILENAME_TEMPLATE } from '../../shared/types'
+import {
+  buildAudioFormatPreference,
+  buildVideoFormatPreference
+} from '../../shared/utils/format-preferences'
 import { settingsManager } from '../settings'
 import { downloadEngine } from './download-engine'
 import { historyManager } from './history-manager'
@@ -481,6 +485,11 @@ export class SubscriptionScheduler extends EventEmitter {
     const downloadDirectory = subscription.downloadDirectory?.trim() || settings.downloadPath
     const namingTemplate =
       subscription.namingTemplate?.trim() || DEFAULT_SUBSCRIPTION_FILENAME_TEMPLATE
+    const downloadType = settings.oneClickDownloadType ?? 'video'
+    const formatPreference =
+      downloadType === 'video'
+        ? buildVideoFormatPreference(settings)
+        : buildAudioFormatPreference(settings)
     ensureDirectoryExists(downloadDirectory)
 
     const tags = Array.from(new Set([subscription.platform, ...subscription.tags]))
@@ -488,7 +497,8 @@ export class SubscriptionScheduler extends EventEmitter {
     try {
       downloadEngine.startDownload(downloadId, {
         url,
-        type: 'video',
+        type: downloadType,
+        format: formatPreference,
         customDownloadPath: downloadDirectory,
         customFilenameTemplate: namingTemplate,
         tags,
diff --git a/src/renderer/src/components/download/DownloadDialog.tsx b/src/renderer/src/components/download/DownloadDialog.tsx
index 268e5ae..1171b83 100644
--- a/src/renderer/src/components/download/DownloadDialog.tsx
+++ b/src/renderer/src/components/download/DownloadDialog.tsx
@@ -14,8 +14,11 @@ import {
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@renderer/components/ui/tabs'
 
 import { cn } from '@renderer/lib/utils'
-
-import type { AppSettings, OneClickQualityPreset, PlaylistInfo, VideoFormat } from '@shared/types'
+import type { PlaylistInfo, VideoFormat } from '@shared/types'
+import {
+  buildAudioFormatPreference,
+  buildVideoFormatPreference
+} from '@shared/utils/format-preferences'
 import { useAtom, useSetAtom } from 'jotai'
 import { AlertCircle, FolderOpen, List, Loader2, Plus, Video } from 'lucide-react'
 import { useCallback, useEffect, useId, useMemo, useState } from 'react'
@@ -37,34 +40,6 @@ import {
 } from '../../store/video'
 import { VideoInfoCard, type VideoInfoCardState } from '../video/VideoInfoCard'
 
-const qualityPresetToVideoHeight: Record<OneClickQualityPreset, number | null> = {
-  best: null,
-  good: 1080,
-  normal: 720,
-  bad: 480,
-  worst: 360
-}
-
-const qualityPresetToAudioAbr: Record<OneClickQualityPreset, number | null> = {
-  best: 320,
-  good: 256,
-  normal: 192,
-  bad: 128,
-  worst: 96
-}
-
-const dedupe = (candidates: Array<string | undefined>): string[] => {
-  const seen = new Set<string>()
-  const result: string[] = []
-  for (const candidate of candidates) {
-    if (!candidate) continue
-    if (seen.has(candidate)) continue
-    seen.add(candidate)
-    result.push(candidate)
-  }
-  return result
-}
-
 const isLikelyUrl = (value: string): boolean => {
   try {
     const parsed = new URL(value)
@@ -74,19 +49,6 @@ const isLikelyUrl = (value: string): boolean => {
   }
 }
 
-const getQualityPreset = (settings: AppSettings): OneClickQualityPreset =>
-  settings.oneClickQuality ?? 'best'
-
-const buildAudioSelectors = (preset: OneClickQualityPreset): string[] => {
-  if (preset === 'worst') {
-    return dedupe(['worstaudio', 'bestaudio'])
-  }
-
-  const abrLimit = qualityPresetToAudioAbr[preset]
-  // Prefer audio-only selectors so video+audio merges remain valid.
-  return dedupe([abrLimit ? `bestaudio[abr<=${abrLimit}]` : undefined, 'bestaudio'])
-}
-
 const isAudioOnlyFormat = (format: VideoFormat): boolean =>
   !!format.acodec && format.acodec !== 'none' && (!format.video_ext || format.video_ext === 'none')
 
@@ -140,49 +102,6 @@ const pickBestAudioFormatsByLanguage = (formats: VideoFormat[]): string[] => {
     })
     .filter((id): id is string => !!id)
 }
-
-const buildVideoFormatPreference = (settings: AppSettings): string => {
-  const preset = getQualityPreset(settings)
-
-  if (preset === 'worst') {
-    // Prefer separate streams, then fall back to single-file selectors.
-    return 'worstvideo+worstaudio/worst/best'
-  }
-
-  const maxHeight = qualityPresetToVideoHeight[preset]
-  const videoCandidates = dedupe([
-    maxHeight ? `bestvideo[height<=${maxHeight}]` : undefined,
-    'bestvideo'
-  ])
-
-  const audioSelectors = buildAudioSelectors(preset)
-  const combinations: string[] = []
-
-  for (const video of videoCandidates) {
-    for (const audio of audioSelectors) {
-      combinations.push(`${video}+${audio}`)
-    }
-  }
-
-  if (audioSelectors.includes('none')) {
-    for (const video of videoCandidates) {
-      combinations.push(video)
-    }
-  } else {
-    // Prefer merged formats, then allow 'best' as a compatibility fallback.
-    combinations.push('bestvideo+bestaudio')
-  }
-
-  combinations.push('best')
-
-  return dedupe(combinations).join('/')
-}
-
-const buildAudioFormatPreference = (settings: AppSettings): string => {
-  const selectors = buildAudioSelectors(getQualityPreset(settings))
-  return dedupe([...selectors, 'best']).join('/')
-}
-
 interface DownloadDialogProps {
   onOpenSupportedSites?: () => void
   onOpenSettings?: () => void
diff --git a/src/shared/utils/format-preferences.ts b/src/shared/utils/format-preferences.ts
new file mode 100644
index 0000000..a0db506
--- /dev/null
+++ b/src/shared/utils/format-preferences.ts
@@ -0,0 +1,81 @@
+import type { AppSettings, OneClickQualityPreset } from '../types'
+
+const qualityPresetToVideoHeight: Record<OneClickQualityPreset, number | null> = {
+  best: null,
+  good: 1080,
+  normal: 720,
+  bad: 480,
+  worst: 360
+}
+
+const qualityPresetToAudioAbr: Record<OneClickQualityPreset, number | null> = {
+  best: 320,
+  good: 256,
+  normal: 192,
+  bad: 128,
+  worst: 96
+}
+
+const dedupe = (candidates: Array<string | undefined>): string[] => {
+  const seen = new Set<string>()
+  const result: string[] = []
+  for (const candidate of candidates) {
+    if (!candidate) continue
+    if (seen.has(candidate)) continue
+    seen.add(candidate)
+    result.push(candidate)
+  }
+  return result
+}
+
+const getQualityPreset = (settings: AppSettings): OneClickQualityPreset =>
+  settings.oneClickQuality ?? 'best'
+
+const buildAudioSelectors = (preset: OneClickQualityPreset): string[] => {
+  if (preset === 'worst') {
+    return dedupe(['worstaudio', 'bestaudio'])
+  }
+
+  const abrLimit = qualityPresetToAudioAbr[preset]
+  return dedupe([abrLimit ? `bestaudio[abr<=${abrLimit}]` : undefined, 'bestaudio'])
+}
+
+export const buildVideoFormatPreference = (settings: AppSettings): string => {
+  const preset = getQualityPreset(settings)
+
+  if (preset === 'worst') {
+    return 'worstvideo+worstaudio/worst/best'
+  }
+
+  const maxHeight = qualityPresetToVideoHeight[preset]
+  const videoCandidates = dedupe([
+    maxHeight ? `bestvideo[height<=${maxHeight}]` : undefined,
+    'bestvideo'
+  ])
+
+  const audioSelectors = buildAudioSelectors(preset)
+  const combinations: string[] = []
+
+  for (const video of videoCandidates) {
+    for (const audio of audioSelectors) {
+      combinations.push(`${video}+${audio}`)
+    }
+  }
+
+  if (audioSelectors.includes('none')) {
+    for (const video of videoCandidates) {
+      combinations.push(video)
+    }
+  } else {
+    combinations.push('bestvideo+bestaudio')
+  }
+
+  combinations.push('best')
+
+  return dedupe(combinations).join('/')
+}
+
+export const buildAudioFormatPreference = (settings: AppSettings): string => {
+  const selectors = buildAudioSelectors(getQualityPreset(settings))
+  return dedupe([...selectors, 'best']).join('/')
+}