# Runway — AVTensor: A High-Performance Rust Media Decoder for Training Pipelines

- Company: Runway (runway.com)
- Announced: 2026-07-10
- Category: developer-tool-release
- Coverage: not counted
- Announcement: yes
- Group: announcements
- Source: https://runway.com/news/engineering/avtensor-a-high-performance-rust-media-decoder-for-training-pipelines
- Record: https://forck.live/items/7867-avtensor-a-high-performance-rust-media-decoder-for-training-pipelines
- Subject: Gen / Aleph

Runway open-sourced AVTensor, a Rust media decoder that demuxes both audio and video streams in a single pass to ensure synchronization, improving training MFU by 1.8 percentage points.

## Evidence

Verbatim from https://runway.com/news/engineering/avtensor-a-high-performance-rust-media-decoder-for-training-pipelines:

> Today we're open-sourcing it: AVTensor , a Rust media decoder that demuxes both streams in a single pass and improved our training MFU by 1.8 percentage points.

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