kling-video-o1

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Core capabilities

• Text to video — Generate a 3–10 second video from a text prompt
• Image and element reference — Preserve characters, objects, scenes, and style with images or Legacy element IDs
• Video editing — Add, remove, or modify elements and change composition, viewpoint, style, color, or weather
• Video reference — Reference content, motion, style, or camera movement to create a previous or next shot
• First/end frames — Guide a transition with a first frame or with both first and end frames

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Quick example

curl --request POST \
  --url https://www.anyfast.ai/kling/v1/videos/omni-video \
  --header 'Authorization: Bearer YOUR_API_KEY' \
  --header 'Content-Type: application/json' \
  --data '{
    "model_name": "kling-o1",
    "prompt": "A traveler walks through a rain-soaked Tokyo street with cinematic camera movement",
    "mode": "pro",
    "aspect_ratio": "16:9",
    "duration": "7"
  }'

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Multimodal prompts

{
  "model_name": "kling-o1",
  "prompt": "Make the person in <<<image_1>>> wave to the camera, using the style of <<<image_2>>>",
  "image_list": [
    {"image_url": "https://example.com/character.png"},
    {"image_url": "https://example.com/style.png"}
  ],
  "mode": "pro",
  "aspect_ratio": "16:9",
  "duration": "5"
}

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Video editing and reference

• refer_type: "base" edits the input video. It cannot be combined with first/end frames, and duration is ignored because output duration follows the input.
• refer_type: "feature" references content, action, style, or camera movement and can generate a previous or next shot.
• Set keep_original_sound to yes or no.
• Set sound to off whenever video_list is present.

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Media limits

• Images accept URL or raw Base64 without a data URI prefix. Use JPG/JPEG/PNG up to 10 MB, at least 300 px per side, and an aspect ratio from 1:2.5 to 2.5:1.
• An end frame requires a first frame. Kling O1 does not support first/end-frame mode when image_list contains more than two images.
• First/end-frame mode cannot use elements.
• Videos must use an accessible MP4/MOV URL, at least 3 seconds, dimensions 720–2160 px, 24–60 fps, at most one file up to 200 MB, and aspect ratio 1:2.5 to 2.5:1.
• Without a reference video and with only multi-image elements, images plus elements cannot exceed 7; with a reference video, the total cannot exceed 4.