what is the struct of opus stream？

[qiqifeng]

I what to decode opus stream,but I don't know how to split frames

[remsky]

This was able to work for me on WSL2 Ubuntu if it helps, included some of the details

import time
import subprocess
from pathlib import Path
from io import BytesIO
from openai import OpenAI

# Initialize OpenAI client pointing to local Kokoro FastAPI server
client = OpenAI(base_url="http://localhost:8880/v1", api_key="not-needed-for-local")
def main():
    print("1. Starting Opus stream...")
    start_time = time.time()
    
    # Start ffplay process
    process = subprocess.Popen(
        ['ffplay', '-'],  # Read from stdin
        stdin=subprocess.PIPE,
        stdout=subprocess.DEVNULL,
        stderr=subprocess.DEVNULL
    )
    
    try:
        # Create streaming response with Opus format
        with client.audio.speech.with_streaming_response.create(
            model="kokoro",
            voice="af_bella",
            response_format="opus",
            input="Testing Opus streaming and decoding"
        ) as response:
            # Process chunks as they arrive
            first_chunk = True
            
            for chunk in response.iter_bytes(chunk_size=1024):
                if first_chunk:
                    ttfb = time.time() - start_time
                    print(f"Time to first byte: {ttfb*1000:.0f}ms")
                    first_chunk = False
                
                # Write chunk to ffplay
                process.stdin.write(chunk)
                process.stdin.flush()
    
    finally:
        # Cleanup
        process.stdin.close()
        process.wait()
    
    print(f"\nTotal processing time: {(time.time() - start_time)*1000:.0f}ms")

if __name__ == "__main__":
    main()

Each frame starts with the "OggS" marker, then the OGG Page Structure:
┌─────────────────────┐
│ OGG Page Header     │ 27 bytes
├─────────────────────┤
│ Segment Table       │ 1 bytes
├─────────────────────┤
│ Opus Packet Data    │ 19 bytes
└─────────────────────┘