Knowledge/projects/local-stt/checkpoint-2026-03-28.md

Conversation Checkpoint: Local STT Implementation

Project: local-stt

• Status: In-Progress (Development/Debugging)
• Environment: Dedicated venv in /home/openclaw/.openclaw/workspace/projects/local-stt/scripts/.
• Dependencies: sherpa-onnx (v1.12.34), numpy, onnx, wave installed.
• Models:
  • STT: sherpa-onnx-streaming-zipformer-en-2023-06-26-mobile
  • Punctuation: sherpa-onnx-punct-ct-transformer-zh-en-vocab272727-2024-04-12-int8
• Current Issue: Encountering RuntimeError: No graph was found in the protobuf and RuntimeError: Got invalid dimensions for input when attempting to run transcribe.py.
• Verified: .onnx model files are valid via the onnx library.
• Next Steps: Investigate version-specific loading methods for Zipformer in sherpa-onnx (the API changed significantly). Confirm exact model source version to ensure compatibility with current Python API.