trackremux 0.4.0

A powerful TUI tool to interactively select and remux audio/subtitle tracks from video files

TrackRemux

TrackRemux is a powerful Terminal User Interface (TUI) tool designed to help you clean up your video library. It allows you to interactively specify audio and subtitle tracks from your video files and remux them into clean, optimized containers without re-encoding the video stream.

This whole project was vibe coded on a Friday evening out of necessity while organizing the media library on my NAS.

[!TIP] Check out the CHANGELOG to see what's new in the latest version!

🚀 Purpose

Modern media often comes with a bloat of unnecessary tracks—commentary audio, multiple languages you don't speak, or dozens of subtitle formats. TrackRemux simplifies the process of removing this clutter.

This not only saves significant disk space but also prevents the confusion and inconvenience of managing tracks in media players (like those on Smart TVs or mobile devices) where selecting the right audio or subtitle stream can be cumbersome or even impossible.

Instead of wrestling with complex ffmpeg command-line arguments for every single file, TrackRemux provides a visual interface to:

1. Scan directories for video files.
2. Select exactly which tracks you want to keep.
3. Remux the file efficiently (Direct Stream Copy).

✨ Features

• Interactive TUI: Built with curses for a fast, keyboard-centric workflow.
• Rich Meta-data Explorer:
  • Displays file sizes, track counts, and audio languages at a glance.
  • Visual Status Indicators: Instantly spot files that have already been converted (Green size) or are currently processing (Dim Yellow).
  • Folder Navigation: Browse nested directory structures (Enter to open, Esc to go back).
• Deep Track Inspection:
  • Track Reordering: Move tracks up/down with Shift+Arrow keys to set their index in the final file.
  • External Tracks: Automatically detects and integrates external audio/subtitle files (even in Audio/ or Subs/ subfolders).
  • Language Management: Guesses 30+ languages from filenames (e.g. dut.srt) or supports manual setting via the [L] key.
  • Smart Matching: Automatically detects existing conversions and restores your previous track selections.
• Preview Capabilities: Listen to audio tracks directly from the TUI (macOS afplay integration) to confirm contents before keeping them.
• Safe Conversion:
  • Uses ffmpeg for robust processing.
  • Non-destructive: Creates new files (converted_filename) by default.
  • Real-time progress bar and size estimation.

📸 Visual Walkthrough

1. Launch & Directory Scan

Scan any folder to instantly see track counts and sizes.

2. Intelligent Track Selection

Pick exactly what you need. Audio previews help distinguish between different dubs or commentaries.

3. External Tracks & Language Editing

TrackRemux finds external subtitle/audio files automatically. You can also manually correct missing language tags.

4. Fast, Lossless Conversion

Watch the progress in real-time as ffmpeg remuxes your file at disk-IO speeds.

5. Successful Completion

Final sizes and success messages are displayed directly in the TUI upon completion.

6. Efficient Storage

Remuxing is lossless and fast. You can see the significant size savings in your directory listing without any quality loss.

🛠️ Prerequisites

• Python 3.10+
• FFmpeg must be installed and accessible in your system PATH.
  • macOS: brew install ffmpeg

📦 Installation & Setup

Option 1: Install as a Global Tool (Recommended)

The easiest way to use TrackRemux is to install it globally using uv:

uv tool install trackremux

Once installed, you can simply run trackremux from any directory.

Option 2: Running from Source

If you prefer to run it directly from the repository:

1. Clone the repository:

   git clone https://github.com/antimirov/trackremux.git
   cd trackremux
   

2. Run using the wrapper:

   python3 trackremux.py /path/to/media
   

3. Run as a module:

   python3 -m trackremux /path/to/media
   

4. Using uv (for development):

   uv sync
   uv run trackremux /path/to/media
   

🖥️ Usage

You can point TrackRemux to a directory (Explorer Mode) or a specific video file (Editor Mode).

Explorer Mode (Directory)

Browse and process your entire library:

trackremux /path/to/your/movies

Single File Mode

Jump straight into the track editor for a specific file:

trackremux "My Movie.mkv"

---

⌨️ Keyboard Controls

File Explorer

Key	Action
↑ / ↓	Navigate file list
PgUp / PgDn	Scroll pages
Enter	Open selected file in Editor
M	Toggle Mouse Support
Q	Quit Application
N / S / T / A	Sort by Name, Size, Tracks, Audio Size

Track Editor

Key	Action
Space	Toggle Track (Keep/Discard)
Enter	Preview Track (Audio only)
← / →	Seek in preview
↑ / ↓	Navigate Tracks
Shift+↑ / ↓	Move selected track UP / DOWN
L	Set Language (Manual edit)
S	Start Conversion / Save changes
Esc / Q	Back to Explorer

🗺️ Roadmap

(Complexity: 🟢 Low, 🟡 Medium, 🔴 High) (Priority: 🔥 High, ⚡ Medium, 🧊 Low)

• 🟠 ⚡ Batch Processing: Select multiple files to queue for sequential remuxing.
• 🔴 🧊 Modern TUI: Consider migrating to Textual for better UI/UX and cross-terminal compatibility.
• 🟡 🔥 Custom Rules: Auto-selection of tracks based on preferred languages.
• 🔴 🧊 Multi-Language Streams: Support for mul / dual-audio tracks (complex mapping).

📝 License

MIT License. See LICENSE for more details.