Aiviel: Local Video Translator

AI Subtitles & Dubbing

Only for Mac

Free · In‑App Purchases

Mac

Translate videos into subtitles and AI dubbing locally. Detect speakers, review assignments, and export precisely timed audio tracks or editing packages. Aiviel combines speech recognition, subtitle translation, voice management, and dubbing export in one local workflow. Media, subtitles, reference audio, and generated results are processed on this device and are not uploaded. SUBTITLES • Use system speech recognition or download Qwen3-ASR 1.7B for high-accuracy long-form recognition with word-level timestamp alignment • Optionally download the approximately 107 MB Nemotron speaker-detection model to assign cues to up to eight speakers; uncertain cues can be checked against source audio and confirmed manually • Generate timeline-based subtitles and edit, add, delete, or assign speakers cue by cue • Translate with the system on-device translation service and switch between source, translated, or bilingual views • Export SRT, WebVTT, and TXT LOCAL AI DUBBING • Use system voices or download IndexTTS-2.5, VoxCPM2, Qwen3-TTS, or VibeVoice local models • Import authorized reference audio to create reusable AI voices; rename, reorder, and audition saved voices • Create single- or multi-speaker dubbing with per-speaker voice, model, speed, and supported emotion controls • Generate all cues in a batch, or play and regenerate individual cues • Detect generated speech that exceeds its original subtitle duration PROFESSIONAL EXPORT • Save results automatically to the app’s default output folder • Export one full-length track when cues do not overlap • When cues overlap, automatically create the minimum number of full-length tracks while preserving exact cue start times • Export a professional editing package with individual cue files, overview tracks, and timeline data Includes a user-initiated 7-day free trial. The trial is not a subscription and never renews or charges automatically. A one-time purchase permanently unlocks the app.

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• New optional on-device speaker detection for up to eight speakers, with a compact model download of about 107 MB. • Listen to original cue audio and confirm speaker assignments; manually confirmed assignments are preserved. • Improved handling of brief speaker changes, overlapping speech, and single-channel speaker assignments. • Projects now save before audio generation and preserve pending edits when switching media or projects. • Safer regenerated-audio storage protects previously saved results if a save is interrupted. • Improved cancellation and error handling during Qwen recognition and speaker detection. • Additional stability and interface improvements.

The developer, Xiaojun Chen, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Seller
    Xiaojun Chen
    Size
    9 MB
    Category
    Photo & Video
    Compatibility
    Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
    • Mac
      Requires macOS 15.0 or later and a Mac with Apple M1 chip or later.
    Languages
    English and 2 more
    • English, Simplified Chinese, Traditional Chinese
    Age Rating
    4+
    In-App Purchases
    Yes
    Copyright
    © 2026 Aiviel