概述

Step ASR - Streaming Speech-to-Text

Transcribe audio files using the Step (StepFun) ASR API with HTTP SSE streaming.

python3 {baseDir}/scripts/transcribe.py /path/to/audio.wav

Basic transcription (Chinese, streaming output):

python3 {baseDir}/scripts/transcribe.py /path/to/audio.wav

Specify language and save to file:

python3 {baseDir}/scripts/transcribe.py /path/to/audio.mp3 --language en --out /tmp/transcript.txt

Use a prompt for terminology correction:

python3 {baseDir}/scripts/transcribe.py /path/to/audio.pcm --prompt "Related terms: OpenClaw, StepFun, ASR"

Output as JSON (includes usage stats):

python3 {baseDir}/scripts/transcribe.py /path/to/audio.ogg --json

Non-streaming mode (only print final result):

python3 {baseDir}/scripts/transcribe.py /path/to/audio.wav --no-stream

Specify audio format explicitly (for raw PCM files without extension):

python3 {baseDir}/scripts/transcribe.py /path/to/raw_audio --format-type pcm --sample-rate 16000

Flag	Default	Description
------	---------	-------------
`--language`	`zh`	Language code (`zh` or `en`)
`--model`	`step-asr`	ASR model name
`--out`	(stdout)	Save transcription to file
`--prompt`	(none)	Hint text to improve accuracy for domain-specific terms
`--format-type`	(auto)	Audio format: `pcm`, `mp3`, `ogg` (auto-detected from extension)
`--sample-rate`	`16000`	Audio sample rate in Hz
`--no-stream`	`false`	Only print the final complete result
`--json`	`false`	Output as JSON with usage statistics
`--no-itn`	`false`	Disable inverse text normalization
`--no-rerun`	`false`	Disable second-pass error correction

Set STEPFUN_API_KEY environment variable, or configure it in ~/.openclaw/openclaw.json:

{
  skills: {
    "step-asr": {
      apiKey: "YOUR_STEPFUN_API_KEY"
    }
  }
}

Get your API key from Step Platform.

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