Multilingual Video Dubbing & Subtitle Agent

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Multilingual Video Dubbing & Subtitle Agent

Translates source videos into target languages with natural-sounding time-aligned dubbed voices while preserving original background music and ambient sound, delivering both the finished MP4 video and synced .srt subtitle file per language.

What it does

• Stem separation: Separates speech from background music/ambient audio (Demucs/FFmpeg audio pipeline) so background audio stays intact under the new voice track.
• Isochronous translation & pacing: Constrains translated phrasing to match source utterance syllable/duration windows and applies pitch-preserving tempo adjustment (0.90x–1.15x via FFmpeg atempo) so longer translated lines stay locked to speaker lip/scene timing without clipping.
• Complete deliverables: Returns one finished video plus one time-coded .srt subtitle file for each requested target language, plus a report naming the transcription, translation, and voice models used.

What buyers provide

• Source video file or URL, confirmation of usage rights (and speaker consent if voice cloning is requested), target language(s), and voice preference.

Short FAQ & Known Limitations

• Does it preserve background music? Yes, speech is isolated from background stems before mixing.