# LiveTrans Configuration

audio:
  # WASAPI loopback device name (null = default output device)
  device: null
  # Sample rate for capture
  sample_rate: 16000
  # Audio chunk duration in seconds for VAD processing (32ms = Silero VAD native window)
  chunk_duration: 0.032

asr:
  # Model size: tiny, base, small, medium, large-v3
  model_size: "medium"
  # Device: cuda or cpu
  device: "cuda"
  # Compute type: float16, int8_float16, int8
  compute_type: "float16"
  # Language: auto, en, ja, zh, ko, etc.
  language: "auto"
  # Minimum speech duration (seconds) before sending to ASR
  min_speech_duration: 1.0
  # Maximum speech duration (seconds) before forced segmentation
  max_speech_duration: 8.0
  # VAD threshold (0.0 - 1.0)
  vad_threshold: 0.5

translation:
  # OpenAI-compatible API settings
  api_base: "https://api.openai.com/v1"
  api_key: "your-api-key-here"
  model: "gpt-4o-mini"
  # Target language for translation
  target_language: "zh"
  # Source language hint (auto = detect from ASR)
  source_language: "auto"
  # Context window size (number of recent translations to include)
  context_window: 10
  # Max tokens for translation response
  max_tokens: 256
  # Temperature
  temperature: 0.3
  # Enable streaming output
  streaming: true
  # System prompt template ({source_lang}, {target_lang}, {context} will be replaced)
  system_prompt: |
    你是一个专业的影视字幕翻译专家。请将以下{source_lang}对话翻译为{target_lang}。
    要求：
    1. 保持口语化，符合目标语言观众的表达习惯
    2. 简洁明了，每句翻译不超过原文两行
    3. 如果语句不完整，结合上下文补全含义
    4. 不要添加解释或注释，只输出翻译结果

    近期对话上下文：
    {context}

subtitle:
  # Font family
  font_family: "Microsoft YaHei"
  # Font size
  font_size: 28
  # Font color (hex)
  font_color: "#FFFFFF"
  # Outline color
  outline_color: "#000000"
  # Outline width
  outline_width: 2
  # Subtitle position from bottom (pixels)
  bottom_margin: 80
  # Show original text above translation
  show_original: true
  # Original text font size
  original_font_size: 20
  # Original text color
  original_color: "#CCCCCC"
  # Subtitle display duration (seconds)
  display_duration: 5.0
  # Window opacity (0.0 - 1.0)
  opacity: 0.95