FLUX 3 First Last Frame to Video：首尾关键帧视频生成，模型与 API | RunComfy

curl --request POST \
  --url https://model-api.runcomfy.net/v1/models/blackforestlabs/flux-3/first-last-frame-to-video \
  --header "Content-Type: application/json" \
  --header "Authorization: Bearer <token>" \
  --data '{
    "start_image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7398/media-files/ref-promo-start.webp",
    "end_image_url": "https://playgrounds-storage-public.runcomfy.net/tools/7398/media-files/ref-promo-end.webp",
    "prompt": "He grips the rope tightly on the dock, then moves beside the boat as the camera follows in one continuous shot. Soft harbor water and distant gulls."
  }'

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/status \
  --header "Authorization: Bearer <token>"

curl --request GET \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/result \
  --header "Authorization: Bearer <token>"

curl --request POST \
  --url https://model-api.runcomfy.net/v1/requests/{request_id}/cancel \
  --header "Authorization: Bearer <token>"

{
  "type": "object",
  "title": "modelApiDoc_navInputSchema",
  "required": [
    "start_image_url",
    "end_image_url",
    "prompt"
  ],
  "properties": {
    "start_image_url": {
      "title": "起始图 URL",
      "description": "用作视频首帧的图片 URL（PNG、JPEG 或 WebP）。",
      "type": "string",
      "default": "https://playgrounds-storage-public.runcomfy.net/tools/7398/media-files/ref-promo-start.webp"
    },
    "end_image_url": {
      "title": "结束图 URL",
      "description": "用作视频末帧的图片 URL（PNG、JPEG 或 WebP）。",
      "type": "string",
      "default": "https://playgrounds-storage-public.runcomfy.net/tools/7398/media-files/ref-promo-end.webp"
    },
    "prompt": {
      "title": "提示词",
      "description": "描述你想生成的视频内容的文本提示词。",
      "type": "string",
      "default": "He grips the rope tightly on the dock, then moves beside the boat as the camera follows in one continuous shot. Soft harbor water and distant gulls."
    },
    "aspect_ratio": {
      "title": "宽高比",
      "description": "生成视频的宽高比。auto 表示由模型自动选择。",
      "type": "string",
      "enum": [
        "auto",
        "21:9",
        "2:1",
        "16:9",
        "4:3",
        "1:1",
        "3:4",
        "9:16"
      ],
      "default": "16:9"
    },
    "resolution": {
      "title": "分辨率",
      "description": "生成视频的分辨率。",
      "type": "string",
      "enum": [
        "720p",
        "1080p"
      ],
      "default": "720p"
    },
    "duration": {
      "title": "时长",
      "description": "生成视频的时长（秒）。需要明确时长以便放置结束帧。",
      "type": "integer",
      "enum": [
        5,
        6,
        7,
        8,
        9,
        10,
        11,
        12,
        13,
        14,
        15,
        16,
        17,
        18,
        19,
        20
      ],
      "default": 5
    },
    "generate_audio": {
      "title": "生成音频",
      "description": "是否为视频生成同步音频。",
      "type": "boolean",
      "default": true
    },
    "safety_tolerance": {
      "title": "安全容忍度",
      "description": "生成视频的安全容忍级别。0 最严格，4 最宽松。",
      "type": "integer",
      "minimum": 0,
      "maximum": 4,
      "default": 2
    }
  }
}