How to Install WhisperX: A Complete Setup Guide
WhisperX is a powerful speech recognition tool built on top of OpenAI's Whisper model. It adds word-level timestamps, speaker diarization, and faster processing — making it a popular choice for transcription workflows, subtitle generation, and research. But installing it correctly requires navigating a few dependencies that trip up many users.
Here's what you need to know before you begin.
What WhisperX Actually Is
WhisperX is an open-source Python library that extends the base Whisper model with:
- Faster inference via the faster-whisper backend
- Word-level timestamps using forced alignment
- Speaker diarization (identifying who said what) via PyAnnote
Because it layers multiple libraries together, the installation is more involved than a typical pip install. Understanding what each component does helps you troubleshoot if something breaks.
Core Prerequisites Before You Install
Before running any install commands, your system needs to meet several requirements. Skipping this step is the most common reason installations fail.
Python Version
WhisperX requires Python 3.8 or higher. Python 3.10 and 3.11 are generally the most stable choices. You can check your version by running: