Violin: AI Translates Video Content

Video has become a dominant medium for information, yet language divides limit its global reach. A new open-source video translation tool called Violin aims to bridge this gap, leveraging advanced AI to make content accessible across languages.

Developed by Together AI, Violin orchestrates a three-stage pipeline: automatic speech recognition (ASR) to transcribe audio, large language models (LLMs) for translation, and text-to-speech (TTS) synthesis for dubbed audio.

Breaking Down Language Barriers

The need for such a tool is clear; studies show a significant portion of popular online video content remains inaccessible to non-English speakers. Violin tackles this by employing state-of-the-art models. For transcription, it utilizes Together’s Whisper V3. Deepseek V4 Pro serves as the default translator, with support for user-defined translation rules to ensure accuracy.

The synthesized speech uses Cartesia’s Sonic 3, offering natural-sounding voices in various languages. Violin avoids voice cloning, opting for distinct voices and subtly overlaying them to maintain clarity without mimicking the original speaker.

Interactive Video Analysis

Beyond simple translation, Violin integrates a multimodal chat assistant. This feature allows users to query the video's content, asking questions that are answered based on both the spoken audio and visual cues. It achieves this by processing recent video frames alongside subtitle context, feeding them into vision-language models like Qwen3.5-397B-A17B.

This capability transforms passive viewing into an interactive learning experience.

Accessible Across Interfaces

Violin is designed for broad usability, offering a web application for no-code users, a command-line interface (CLI) for developers, and agent skills for AI practitioners. The entire codebase is released under a permissive MIT license, encouraging community contributions and adaptations.

The project aims to foster open collaboration to make video content truly language-agnostic.