{
  "id": "ocr-subtitle",
  "name": "字幕OCR提取",
  "description": "抽帧并 OCR 提取视频烧录字幕，经 LLM 过滤无意义内容后生成带时间轴的 SRT 基准数据。",
  "version": 4,
  "definition": {
    "name": "字幕OCR提取",
    "version": 4,
    "nodes": [
      {
        "id": "extract",
        "node_type": "frame-extract",
        "params": {
          "interval_seconds": 0.5,
          "crop": [
            0,
            0.82,
            1,
            0.18
          ]
        },
        "inputs": {
          "video_uri": "input.video_uri"
        }
      },
      {
        "id": "ocr",
        "node_type": "subtitle-ocr",
        "params": {
          "prompt": "提取图像中的文字，不要描述图片中的内容",
          "pool_min_workers": 1,
          "pool_max_workers": 1
        },
        "inputs": {
          "frames_manifest": "extract.frames_manifest"
        }
      },
      {
        "id": "filter",
        "node_type": "llm-filter",
        "params": {
          "pool_min_workers": 1,
          "pool_max_workers": 1
        },
        "inputs": {
          "srt_uri": "ocr.srt_uri"
        }
      }
    ],
    "edges": [
      {
        "from": "extract",
        "to": "ocr"
      },
      {
        "from": "ocr",
        "to": "filter"
      }
    ],
    "entry_inputs": {
      "video_uri": "file"
    },
    "final_outputs": {
      "srt": "filter.srt_uri"
    }
  }
}