videostringrequired
Reference video URL. Only .mp4/.mov formats, 3-10s duration, 720-2160px resolution, max 200MB.
Kling O3 4K Video Reference
30% OFF
kwaivgi/kling-video/o3/4k/video-to-videoKling O3 4K Video Reference by Kuaishou generates a new native 4K shot that follows the style and camera motion of a reference video, optionally guided by reference images.
Try the model
Playground
Input
Text prompt for video generation. Reference video as @Video1.
Reference video URL. Only .mp4/.mov formats, 3-10s duration, 720-2160px resolution, max 200MB.
Additional Settings More
Customize your input with more control.
PNG, JPEG, WebP, or GIF · 20 MiB maximum each
Reference images for style/appearance. Reference in prompt as @Image1, @Image2, etc. Maximum 4 total (elements + reference images) when using video.
Video duration in seconds (3-15s for reference video). Allowed values: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15.
Whether to keep the original audio from the reference video.
The type of multi-shot video generation.
The aspect ratio of the generated image. Allowed values: 16:9, 9:16, 1:1.
ResultExample
What would you like to do next?
Examples
Select an example to load its inputs and result into the playground.
- Open result ↗
Input
{ "prompt": "Integrate @Element1 in the scene. Style video should be following watercolor style of @Image1", "video": "https://static.sandbase.ai/examples/efb9ed85-8d55-48df-956f-2f5c72ee7fd8/input/b8d4e379-e81f-4fb1-9009-75af47153760.mp4" }
Kling O3 4K Video Reference
Kling O3 4K video reference: generate new shots that follow the motion and camera language of a reference video, while the prompt and optional reference images set the new scene and look.
Fields
| Field | Type | Default | Notes |
|---|---|---|---|
prompt | string, required | — | Up to 2,500 characters. |
images | image URL[] | — | Reference images, referred to as @Image1, @Image2, … in the prompt. |
video | video URL, required | — | Reference video, @Video1 in the prompt. |
duration | 3–15 | — | Output length; omit to match the reference. |
keep_audio | boolean | true | Keep the source video's audio track. |
shot_type | string | customize | customize follows your multi_prompt shot list; intelligent lets the model plan the cuts. |
aspect_ratio | 16:9 / 9:16 / 1:1 | 16:9 | Output frame shape. |
Billing
You pay $0.42 per output second. Without duration the output matches the reference length; the quote assumes 5 seconds.
| Output | Price |
|---|---|
| 3s | $1.26 |
| 5s | $2.10 |
| 10s | $4.20 |
| 15s | $6.30 |
Failed runs are not charged.
Prompting
- Describe the new scene; the reference video supplies motion and camera.
Limits
- Clips are 3–15 seconds.
Also on SandBase
Other Kling O3 4K endpoints and tiers: kwaivgi/kling-video/o3/4k/text-to-video, kwaivgi/kling-video/o3/4k/image-to-video, kwaivgi/kling-video/o3/4k/reference-to-video, kwaivgi/kling-video/o3/4k/edit, kwaivgi/kling-video/o3/standard/video-to-video, kwaivgi/kling-video/o3/pro/video-to-video.
Start building
Send your first request
Submit this model through the SandBase Unified Run API.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/run" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "kwaivgi/kling-video/o3/4k/video-to-video",
"video": "https://static.sandbase.ai/examples/kwaivgi/mirrored/example_inputs/kling-o3/pro-v2v-reference/video_reference.mp4",
"images": [
"https://static.sandbase.ai/examples/kwaivgi/mirrored/example_inputs/kling-o3/pro-v2v-reference/image_url1.jpg",
"https://static.sandbase.ai/examples/kwaivgi/mirrored/example_inputs/kling-o3/pro-v2v-reference/image_url2.jpg"
],
"prompt": "Integrate @Element1 in the scene. Style video should be following watercolor style of @Image1",
"duration": "5",
"shot_type": "customize",
"keep_audio": false,
"aspect_ratio": "16:9"
}
SANDBASE_JSON
)
run_id=$(printf '%s' "$result" | jq -r .id)
for attempt in $(seq 1 120); do
status=$(printf '%s' "$result" | jq -r .status)
case "$status" in completed|failed|timeout) break ;; esac
sleep 2
result=$(curl --fail-with-body --silent \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
"https://api.sandbase.ai/v1/run/$run_id")
done
status=$(printf '%s' "$result" | jq -r .status)
[ "$status" = completed ] || { echo "Generation ended: $status" >&2; exit 1; }
printf '%s\n' "$result"2. Authentication
Create a SandBase API key and set it in your server environment. All requests use Bearer authentication.
export SANDBASE_API_KEY="YOUR_API_KEY"Keep the key on your server. Do not expose it in browser code or commit it to a repository.
3. Queue
Submit a request
POST to /v1/run with this model ID and its inputs. The request example above includes submission and polling.
Fetch request status and result
Use the returned run ID to poll until the status is completed, failed or timeout. Read output only after completed.
curl "https://api.sandbase.ai/v1/run/$RUN_ID" \
-H "Authorization: Bearer $SANDBASE_API_KEY"4. Files
Hosted files
Pass a publicly accessible file URL in the model’s image, video or audio field. Supported formats and limits are shown beside each Playground input.
Uploading images
Use the upload or replace control on supported image fields in the Playground. Video URL fields accept a hosted driving video; they do not imply video-upload support.
5. Schema
Input
imagesarray
Reference images for style/appearance. Reference in prompt as @Image1, @Image2, etc. Maximum 4 total (elements + reference images) when using video.
promptstringrequired
Text prompt for video generation. Reference video as @Video1.
durationinteger
Video duration in seconds (3-15s for reference video).
Possible values: 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15
shot_typestring
The type of multi-shot video generation.
Default: "customize"
keep_audioboolean
Whether to keep the original audio from the reference video.
Default: true
aspect_ratiostring
The aspect ratio of the generated image.
Default: "16:9"
Possible values: "16:9", "9:16", "1:1"
{
"model": "kwaivgi/kling-video/o3/4k/video-to-video",
"video": "https://static.sandbase.ai/examples/kwaivgi/mirrored/example_inputs/kling-o3/pro-v2v-reference/video_reference.mp4",
"images": [
"https://static.sandbase.ai/examples/kwaivgi/mirrored/example_inputs/kling-o3/pro-v2v-reference/image_url1.jpg",
"https://static.sandbase.ai/examples/kwaivgi/mirrored/example_inputs/kling-o3/pro-v2v-reference/image_url2.jpg"
],
"prompt": "Integrate @Element1 in the scene. Style video should be following watercolor style of @Image1",
"duration": "5",
"shot_type": "customize",
"keep_audio": false,
"aspect_ratio": "16:9"
}Output
A completed run exposes its result in output. The following is the model’s saved example, not a new generation.
[
{
"poster": "https://static.sandbase.ai/examples/posters/536c891e9af8cbdc212d.jpg",
"source": "Kling AI official schema mirror",
"source_url": "https://kling.ai/document-api/guides/get-started/overview",
"url": "https://static.sandbase.ai/examples/efb9ed85-8d55-48df-956f-2f5c72ee7fd8/output/bc98d56b-34da-4cc2-a825-6333105b5692.mp4"
}
]