⬡ Stitch

Lossless video file concat — dead simple.

Stitch joins multiple video files into one without re-encoding. No quality loss, no audio drift. Drop your files, pick an order, click Merge.

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Why

Every other tool either re-encodes (destroying quality) or is too complex for a simple stitch job. Stitch does one thing well — it uses ffmpeg's MPEG-TS intermediate method to handle timestamp discontinuities correctly, which is why audio stays in sync across segment boundaries.

Features

• Drag & drop video files (MP4, MKV, MOV, AVI, TS)
• Drag-to-reorder before merging
• Zero re-encoding — lossless, -c copy all the way
• Proper audio sync via TS intermediate (fixes the drift issue)
• Auto-detects ffmpeg from PATH and common install locations
• Supports H.264, HEVC/H.265, AV1, VP9
• Real-time progress with phase indicator
• Lightweight — built with Tauri (Rust + React)

How it works

For each input file, Stitch remuxes to MPEG-TS (no re-encode, just container change). Then concatenates all TS files and remuxes back to MP4. The TS format handles timestamp resets at segment boundaries — this is what prevents audio/video drift in long multi-file joins.

input1.mp4 ──► input1.ts ─┐
input2.mp4 ──► input2.ts ─┼──► concat ──► output.mp4
input3.mp4 ──► input3.ts ─┘

All steps use -c copy. No pixels or audio samples are decoded or re-encoded.

Requirements

• ffmpeg — place it anywhere; Stitch auto-detects from PATH, C:/ffmpeg/bin/, Pictures/, Downloads/, or set it manually in Settings.

Dev setup

# Prerequisites: Node.js, Rust, Cargo
npm install
npm run tauri dev

Build

npm run tauri build

Produces a standalone installer in src-tauri/target/release/bundle/.

Stack

• Tauri v2 — Rust backend, native window
• React + TypeScript + Vite — frontend
• IBM Plex Mono / Sans — typography
• ffmpeg — the actual heavy lifting

License

MIT