Timeline Forced Alignment

Use forced alignment models to get higher precision character-level timestamps, ideal for scenarios requiring precise timing.

---

⚡ Quick Setup (v3.0+)

v3.0 has a built-in CTC aligner. Simply:

1. Open Settings > Enhancement > Timeline Alignment
2. Set Alignment Mode to "CTC"
3. Download the alignment model
4. Set the model directory in CTC aligner configuration to the model path (folder)

---

🎯 How It Works

High-precision timeline alignment based on CTC (Connectionist Temporal Classification) technology:

• Millisecond Precision: Supports character-level timestamp alignment
• Auto Correction: Fixes timing drift in Whisper transcription
• Multi-Language Support: Supports Chinese, English, Japanese, and more
• GPU Acceleration: Supports ONNX Runtime GPU acceleration (if available)

---

Alignment Mode Comparison

---

❓ FAQ

Alignment is slow?

CTC alignment requires computational resources. Optimization tips:

1. Ensure sufficient memory (16GB+ recommended)
2. For long videos, alignment is processed in segments

Alignment makes timing worse?

This can happen if the source video has poor audio quality, or the alignment model isn't optimized for the specific language/accent. Suggestions:

1. Check the source video audio quality
2. Temporarily disable alignment and use the original timestamps

Aligner version too old?

The Omnilingual ASR CTC 300M model requires aligner v0.2.0 or later. To fix:

1. Open Settings > About
2. Click "Check for Updates" to update the aligner component
3. If the update is unavailable, you can temporarily switch back to the legacy MMS-300M model