Seedance 1.5 Pro API reference
Native-audio clips with an optional locked camera
Call Seedance 1.5 Pro from your own code with one PopNow API key. Below are the exact model IDs to send, every input field the model accepts, what each request costs in credits, and a request you can paste into a terminal.
At a glance
- Made by
- ByteDance
- Output
- Video
- From
- 1.68 credits per second of output ($0.0168)
- Typical time
- about 51 s
1 credit = $0.01. A task holds the highest possible charge when it is accepted and settles the real amount when it finishes, rounded up to whole credits; failed tasks are not charged. Ask POST /api/v1/jobs/quote for the exact figure before you run.
Create Video
bytedance/seedance-1.5-pro/text-to-video
Price
| Option | Credits (per second of output) | US dollars |
|---|---|---|
generate_audio = false, resolution = 480p | 1.68 | $0.0168 |
generate_audio = true, resolution = 480p | 3.35 | $0.0335 |
generate_audio = false, resolution = 720p | 3.41 | $0.0341 |
generate_audio = true, resolution = 720p | 6.81 | $0.0681 |
generate_audio = false, resolution = 1080p | 7.36 | $0.0736 |
generate_audio = true, resolution = 1080p | 14.73 | $0.1473 |
Parameters
| Field | Type | Default | Allowed | What it does |
|---|---|---|---|---|
promptRequired | string | — | — | What to generate: subject, action, camera movement and mood. |
aspect_ratioOptional | string | 16:9 | 21:9, 16:9, 4:3, 1:1, 3:4, 9:16 | Aspect ratio of the generated video. |
resolutionOptional | string | 720p | 480p, 720p, 1080p | Output resolution. Super-resolution tiers are not offered. |
duration_secondsOptional | integer | 5 | 4 to 12 | Clip length in seconds. This is the billed quantity. |
generate_audioOptional | boolean | true | — | Generate a native soundtrack synchronised to the picture. |
camera_fixedOptional | boolean | false | — | Lock the camera to produce a stable, fixed-position shot. |
seedOptional | integer | — | 0 to 2147483647 | Random seed for controlled comparisons. Omit it to let each run pick its own. |
Example request
This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.
curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask" \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"model": "bytedance/seedance-1.5-pro/text-to-video",
"input": {
"prompt": "A paper boat drifts down a rain-soaked street at dusk, neon signs reflecting in the water, slow tracking shot at ground level",
"generate_audio": true,
"duration_seconds": 5,
"resolution": "720p"
}
}'The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
-H "Authorization: Bearer $POPNOW_API_KEY"Image to Video
bytedance/seedance-1.5-pro/image-to-video
Price
| Option | Credits (per second of output) | US dollars |
|---|---|---|
generate_audio = false, resolution = 480p | 1.68 | $0.0168 |
generate_audio = true, resolution = 480p | 3.35 | $0.0335 |
generate_audio = false, resolution = 720p | 3.41 | $0.0341 |
generate_audio = true, resolution = 720p | 6.81 | $0.0681 |
generate_audio = false, resolution = 1080p | 7.36 | $0.0736 |
generate_audio = true, resolution = 1080p | 14.73 | $0.1473 |
Parameters
| Field | Type | Default | Allowed | What it does |
|---|---|---|---|---|
promptRequired | string | — | — | What to generate: subject, action, camera movement and mood. |
image_urlRequired | string | — | — | URL of the image used as the first frame. |
last_image_urlOptional | string | — | — | Optional closing frame the shot has to land on (480p and 720p). |
aspect_ratioOptional | string | 16:9 | 21:9, 16:9, 4:3, 1:1, 3:4, 9:16 | Aspect ratio of the generated video. |
resolutionOptional | string | 720p | 480p, 720p, 1080p | Output resolution. Super-resolution tiers are not offered. |
duration_secondsOptional | integer | 5 | 4 to 12 | Clip length in seconds. This is the billed quantity. |
generate_audioOptional | boolean | true | — | Generate a native soundtrack synchronised to the picture. |
camera_fixedOptional | boolean | false | — | Lock the camera to produce a stable, fixed-position shot. |
seedOptional | integer | — | 0 to 2147483647 | Random seed for controlled comparisons. Omit it to let each run pick its own. |
Example request
This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.
The example uses PopNow sample files in image_url. Replace them with your own public HTTPS links, uploads or saved assets.
curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask" \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"model": "bytedance/seedance-1.5-pro/image-to-video",
"input": {
"prompt": "He lands softly on the rooftop, laughs and turns toward the camera while the balloons sway in the evening breeze; slow push-in",
"image_url": "https://media.popnow.ai/influencer/examples/marco.webp",
"generate_audio": true,
"duration_seconds": 5,
"resolution": "720p"
}
}'The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
-H "Authorization: Bearer $POPNOW_API_KEY"Extend Video
bytedance/seedance-1.5-pro/video-extend
Price
| Option | Credits (per second of output) | US dollars |
|---|---|---|
generate_audio = false, resolution = 480p | 1.68 | $0.0168 |
generate_audio = true, resolution = 480p | 3.35 | $0.0335 |
generate_audio = false, resolution = 720p | 3.41 | $0.0341 |
generate_audio = true, resolution = 720p | 6.81 | $0.0681 |
generate_audio = false, resolution = 1080p | 7.36 | $0.0736 |
generate_audio = true, resolution = 1080p | 14.73 | $0.1473 |
Parameters
| Field | Type | Default | Allowed | What it does |
|---|---|---|---|---|
promptRequired | string | — | — | Describe what happens next: the action that follows, the camera move and the sound. Required. |
video_urlRequired | string (uri) | — | — | The clip to continue: MP4, MOV or WebM, up to 60 seconds. Its final frame becomes the opening frame of the new segment, and the result is your clip with the new segment joined on. |
last_image_urlOptional | string | — | — | Optional target end frame: the new segment lands on this picture. |
resolutionOptional | string | 720p | 480p, 720p, 1080p | Resolution of the new segment; match your source clip. |
duration_secondsOptional | integer | 5 | 4 to 12 | Length of the new segment in seconds. The source clip is added on top and is not billed. |
generate_audioOptional | boolean | true | — | Generate sound for the new segment. The source keeps its own sound either way. |
camera_fixedOptional | boolean | false | — | Lock the camera to produce a stable, fixed-position shot. |
seedOptional | integer | — | 0 to 2147483647 | Random seed for controlled comparisons. Omit it to let each run pick its own. |
Example request
This request runs as it is; any field you leave out uses its default. Put your key in POPNOW_API_KEY first.
The example uses PopNow sample files in video_url. Replace them with your own public HTTPS links, uploads or saved assets.
curl -X POST "https://api.popnow.ai/api/v1/jobs/createTask" \
-H "Authorization: Bearer $POPNOW_API_KEY" \
-H "Content-Type: application/json" \
-H "Idempotency-Key: $(uuidgen)" \
-d '{
"model": "bytedance/seedance-1.5-pro/video-extend",
"input": {
"prompt": "The flowers keep opening while the camera slowly pulls back to reveal a sunlit meadow",
"video_url": "https://media.popnow.ai/effects/flower-bloom-1abd6efb.mp4",
"generate_audio": true,
"duration_seconds": 5,
"resolution": "720p"
}
}'The response carries a taskId straight away. Read the result with GET /api/v1/jobs/recordInfo, or add callBackUrl to be notified.
curl "https://api.popnow.ai/api/v1/jobs/recordInfo?taskId=TASK_ID_FROM_CREATE_TASK" \
-H "Authorization: Bearer $POPNOW_API_KEY"