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OpenRouter Audio Transcription

Transcribe audio files using OpenRouter's chat completions API with

input_audio

content type. Works with any audio-capable model.

Quick start

{baseDir}/scripts/transcribe.sh /path/to/audio.m4a

Output goes to stdout.

Useful flags

# Custom model (default: google/gemini-2.5-flash)
{baseDir}/scripts/transcribe.sh audio.ogg --model openai/gpt-4o-audio-preview
Custom instructions
{baseDir}/scripts/transcribe.sh audio.m4a --prompt "Transcribe with speaker labels"
Save to file
{baseDir}/scripts/transcribe.sh audio.m4a --out /tmp/transcript.txt
Custom caller identifier (for OpenRouter dashboard)
{baseDir}/scripts/transcribe.sh audio.m4a --title "MyApp"

How it works

Converts audio to WAV (mono, 16kHz) using ffmpeg
Base64 encodes the audio
Sends to OpenRouter chat completions with
```
input_audio
```
content
Extracts transcript from response

API key

Set

OPENROUTER_API_KEY

env var, or configure in

~/.clawdbot/clawdbot.json

:

{
  skills: {
    "openrouter-transcribe": {
      apiKey: "YOUR_OPENROUTER_KEY"
    }
  }
}

Headers

The script sends identification headers to OpenRouter:

```
X-Title
```
: Caller name (default: "Peanut/Clawdbot")
```
HTTP-Referer
```
: Reference URL (default: "https://clawdbot.com")

These show up in your OpenRouter dashboard for tracking.

Troubleshooting

ffmpeg format errors: The script uses a temp directory (not

mktemp -t file.wav

) because macOS's mktemp adds random suffixes after the extension, breaking format detection.

Argument list too long: Large audio files produce huge base64 strings that exceed shell argument limits. The script writes to temp files (

--rawfile

for jq,

@file

for curl) instead of passing data as arguments.

Empty response: If you get "Empty response from API", the script will dump the raw response for debugging. Common causes:

Invalid API key
Model doesn't support audio input
Audio file too large or corrupted

Transcribe audio files via OpenRouter using audio-capable models

AI Skill Market Insights

Be Part of the 0+ Developer Community

OpenRouter Audio Transcription

Quick start

Useful flags

Custom instructions

Save to file

Custom caller identifier (for OpenRouter dashboard)

How it works

API key

Headers

Troubleshooting

Quick Start

Manual Installation

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