Start Stream Via API

Learn how to start a stream using the Lingopal SOD API with Python examples and environment variable setup.

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Required Environment Variables

• LINGOPAL_API_KEY: Your API key for authentication
• LINGOPAL_INGEST_URL: The SRT ingest URL (e.g., srt://your.server:7070)

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Example

export LINGOPAL_API_KEY="your-api-key"
export LINGOPAL_INGEST_URL="srt://your.srt.server:7070"
python examples/start_stream.py

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Python Implementation

import os
import requests

# Environment variables
API_KEY = os.getenv("LINGOPAL_API_KEY")
INGEST_URL = os.getenv("LINGOPAL_INGEST_URL")
API_URL = os.getenv("LINGOPAL_API_URL", "https://streaming.lingopal.ai/v1/streams/start")

# Check required variables
if not API_KEY:
    raise ValueError("❌ Please set the LINGOPAL_API_KEY environment variable.")
if not INGEST_URL:
    raise ValueError("❌ Please set the LINGOPAL_INGEST_URL environment variable.")

# Payload
payload = {
    "ingest_url": INGEST_URL,
    "vocals_track": "0",
    "background_track": 1,
    "mix": "-9,-6",
    "enable_captions_708": True,
    "enable_captions_608": False,
    "src_language": "en",
    "dst_language": ["es"],
    "use_paraphrasing_transcription": True,
    "start_wowza": True,
    "is_hls_stream": False,
    "use_contextual_translation": False,
    "lipsync": False
}

# Headers
headers = {
    "Content-Type": "application/json",
    "Accept": "application/json",
    "X-API-Key": API_KEY
}

# Make the API request
response = requests.post(API_URL, json=payload, headers=headers)
print(response.json())

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What This Does

This example demonstrates how to:

1. Set up environment variables for your API key and ingest URL
2. Create a payload with all the necessary stream parameters
3. Make an authenticated API request to start your stream
4. Handle the response from the API

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Parameters Explained

• ingest_url: Your SRT stream source URL
• src_language: Source language (e.g., “en” for English)
• dst_language: Target language(s) for translation (e.g., [“es”] for Spanish)
• enable_captions_708/608: Enable CEA-708 or CEA-608 captions
• vocals_track: Audio track for vocals (default: “0”)
• background_track: Audio track for background audio (default: 1)
• mix: Audio mix settings (default: “-9,-6”)
• lipsync: Enable lip synchronization
• use_contextual_translation: Enable contextual translation
• start_wowza: Start Wowza streaming server
• is_hls_stream: Set to true for HLS streams

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Next Steps

After starting your stream, you can:

• Monitor stream status using the stream ID returned
• Retrieve transcripts and captions
• Stop the stream when finished
• View analytics and usage data

For more information about the WebSocket protocol and message formats, see the Introduction documentation.

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Getting Help

• Visit our GitHub repository for the latest code and issues