seedinteger
Random seed for more reproducible results.
Minimum: 0
Maximum: 4294967295
Veo 3.1 Reference to Video
google/veo3.1/reference-to-videoVeo3.1 is Google's image-to-video AI model. Bring static images to life with fluid animation, consistent character motion, and professional-grade video output.
Try the model
Playground
Input
The text prompt describing the video you want to generate
PNG, JPEG, WebP, or GIF · 20 MiB maximum each · up to 3
Up to 3 reference images of subjects to keep consistent in the video.
Add at least one media item.
Additional Settings More
Customize your input with more control.
Reference-to-video only supports 8 seconds. Allowed values: 8.
Output resolution. Allowed values: 720p, 1080p, 4k.
Output aspect ratio. Allowed values: 16:9, 9:16.
Generate synchronized audio. Videos without audio are cheaper.
Random seed for more reproducible results. Range: 0 to 4294967295.
ResultIdle
Your output will appear here
Complete the inputs, then click Run.
Veo 3.1 Reference to Video
Veo 3.1 reference-to-video: up to 3 reference images keep a character, product, or style consistent in a new 8 second clip with native audio.
Fields
| Field | Type | Default | Notes |
|---|---|---|---|
prompt | string, required | — | Up to 20,000 characters. |
images | image URL[] (≤3), required | — | Up to 3 reference images, Image 1 to Image 3. |
duration | 8 | 8 | Output length in seconds. |
resolution | 720p / 1080p / 4k | 720p | Sets the per-second rate. |
aspect_ratio | 16:9 / 9:16 | 16:9 | Output frame shape. |
generate_audio | boolean | true | Native dialogue, music, and effects; turning it off lowers the rate. |
seed | integer 0–4294967295 | random | Fix it to compare prompt changes. |
Billing
You pay for output seconds, Google's list price. With audio: $0.40 at 720p, $0.40 at 1080p, $0.60 at 4k. Without audio: $0.20 / $0.20 / $0.40 respectively.
| Output | 720p | 1080p | 4k |
|---|---|---|---|
| 8s with audio (default) | $3.20 | $3.20 | $4.80 |
| 8s without audio | $1.60 | $1.60 | $3.20 |
Failed runs are not charged.
Prompting
- Say what each reference is: “Image 1 is the host, Image 2 is the studio”.
- Describe the action and the sound; the references set appearance.
Limits
- Up to 3 reference images; clips are 8 seconds.
- Use Veo 3.1 Fast for cheaper drafts.
Also on SandBase
Other Veo 3.1 endpoints: google/veo3.1/text-to-video, google/veo3.1/image-to-video, google/veo3.1/first-last-frame-to-video, google/veo3.1/video-extend, google/veo3.1/fast/text-to-video, google/veo3.1/lite/text-to-video.
Start building
Send your first request
Submit this model through the SandBase Unified Run API.
# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
-X POST "https://api.sandbase.ai/v1/run" \
-H "Authorization: Bearer $SANDBASE_API_KEY" \
-H "Content-Type: application/json" \
--data-binary @- <<'SANDBASE_JSON'
{
"model": "google/veo3.1/reference-to-video",
"prompt": "A chimpanzee wearing overalls frolics in the grassy field, gently playing with the butterflies. In the background, a circus tent and carousel beckon.",
"duration": 8,
"resolution": "720p",
"aspect_ratio": "16:9",
"generate_audio": true
}
SANDBASE_JSON
)
run_id=$(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
imagesarrayrequired
Up to 3 reference images of subjects to keep consistent in the video.
promptstringrequired
The text prompt describing the video you want to generate
durationinteger
Reference-to-video only supports 8 seconds.
Default: 8
Possible values: 8
resolutionstring
Output resolution.
Default: "720p"
Possible values: "720p", "1080p", "4k"
aspect_ratiostring
Output aspect ratio.
Default: "16:9"
Possible values: "16:9", "9:16"
generate_audioboolean
Generate synchronized audio. Videos without audio are cheaper.
Default: true
{
"model": "google/veo3.1/reference-to-video",
"prompt": "A chimpanzee wearing overalls frolics in the grassy field, gently playing with the butterflies. In the background, a circus tent and carousel beckon.",
"duration": 8,
"resolution": "720p",
"aspect_ratio": "16:9",
"generate_audio": true
}Output
A completed run exposes its result in output. The following is the model’s saved example, not a new generation.
No example output has been published yet. Use Playground → Result → JSON after a completed run to inspect your response.