A lightweight Python GUI tool that monitors Shotcut exports, Firefox downloads, or a basic countdown – and shuts down your PC when the task finishes.
| Tab | What it does |
|---|---|
| ⏰ Basic | Simple countdown timer – set hours and minutes. |
| 🦊 Firefox | Watches for .part download files. Skips stalled downloads. Shuts down after all downloads complete. |
| 🎬 Shotcut | Detects melt processes (Shotcut's render engine). Shows progress. Handles queued exports. Shuts down after all exports (1 or more). |
| 🔊 Audio | Monitors audio playing. Shuts down after audio stops. Perfect before sleep, movies, music, etc. |
| Cancel Process | Stops any running process immediately – no matter which tab. |
- OS: Linux (Mint / Ubuntu / Debian / Xfce, GNOME, etc.)
- Python: 3.8 or newer
- Shotcut: any version (for the Shotcut tab)
- Python packages:
psutil,tkinter(built-in)
| Component | Tested version(s) |
|---|---|
| Linux Mint | 22.2 Zara (Xfce) – main test environment |
| Ubuntu / Debian | Should work on 24.04 (Noble) and Debian 12+ – not fully tested |
| Python | 3.12 (but should work on 3.8+) |
| Shotcut | 26.8.1 and later – any version using melt -progress2 |
| Firefox | Any modern version (tested with v130+) |
⚠️ Windows / macOS: This script is designed for Linux only. It has not been tested on other operating systems. The shutdown command (systemctl poweroff) and process detection may not work on non-Linux platforms.
# 1. System dependencies
sudo apt update
sudo apt install python3-pip python3-tk
# 2. Install psutil (pick ONE)
# Option A — venv (recommended, safe)
python3 -m venv ~/myenv
source ~/myenv/bin/activate
pip install psutil
# Option B — global (quick, but bypasses safety)
pip install --break-system-packages psutil
# 3. Run
python3 SmartShutdownTimer.py