Seedance 2.5 Edit API

Edit video with a prompt: swap subjects, objects, audio.

~194.47s

POST /v2/seedance-2.5-edit · submit + poll

 1# pip install "segmind>=1.1.0"
 2# export SEGMIND_API_KEY="YOUR_API_KEY"
 3from segmind import SegmindClient, InferenceFailed, InferenceTimeout
 4
 5# Async (v2) — recommended for long-running / video models.
 6# run() blocks up to 600s; submit_async + job.wait(timeout=...) sets a longer
 7# deadline and keeps the request_id so you can re-poll later.
 8client = SegmindClient()                      # reads SEGMIND_API_KEY
 9payload = {
10    "video": "https://segmind-resources.s3.amazonaws.com/input/seedance-2.5-edit-source-739a4cc6.mp4",
11    "prompt": "Replace the tin toy robot in @Video 1 with a soft plush teddy bear of the same size, keeping its exact marching motion, the workshop bench, the colourful building blocks and the lighting unchanged.",
12    "resolution": "720p",
13    "generate_audio": True,
14}
15job = client.submit_async("seedance-2.5-edit", **payload)
16print(job.request_id)                         # available immediately
17try:
18    result = job.wait(timeout=900, interval=2.0)
19    print(result["status"])                  # COMPLETED
20    print(result.get("output"))              # model output (e.g. video URL)
21except InferenceTimeout as e:
22    print("still running:", e.request_id)    # re-poll later with this id
23except InferenceFailed as e:
24    print("failed:", e.detail)
25
26# Fast models (<=600s) can use the one-liner instead:
27# result = segmind.run("seedance-2.5-edit", **payload)

 1# pip install "segmind>=1.1.0"
 2# export SEGMIND_API_KEY="YOUR_API_KEY"
 3from segmind import SegmindClient, InferenceFailed, InferenceTimeout
 4
 5# Async (v2) — recommended for long-running / video models.
 6# run() blocks up to 600s; submit_async + job.wait(timeout=...) sets a longer
 7# deadline and keeps the request_id so you can re-poll later.
 8client = SegmindClient()                      # reads SEGMIND_API_KEY
 9payload = {
10    "video": "https://segmind-resources.s3.amazonaws.com/input/seedance-2.5-edit-source-739a4cc6.mp4",
11    "prompt": "Replace the tin toy robot in @Video 1 with a soft plush teddy bear of the same size, keeping its exact marching motion, the workshop bench, the colourful building blocks and the lighting unchanged.",
12    "resolution": "720p",
13    "generate_audio": True,
14}
15job = client.submit_async("seedance-2.5-edit", **payload)
16print(job.request_id)                         # available immediately
17try:
18    result = job.wait(timeout=900, interval=2.0)
19    print(result["status"])                  # COMPLETED
20    print(result.get("output"))              # model output (e.g. video URL)
21except InferenceTimeout as e:
22    print("still running:", e.request_id)    # re-poll later with this id
23except InferenceFailed as e:
24    print("failed:", e.detail)
25
26# Fast models (<=600s) can use the one-liner instead:
27# result = segmind.run("seedance-2.5-edit", **payload)

API Endpoint

POSThttps://api.segmind.com/v1/seedance-2.5-edit

Parameters

promptrequired

string

What to change in @Video 1: add, remove, replace or change something, or edit the audio. Everything you do not mention stays as it is. Cite extra references as '@Image 1', '@Audio 1'. If the prompt names no edit, 'Edit @Video 1:' is prepended.

videorequired

string (uri)

The clip to edit (@Video 1): 4-30 seconds, mp4 or mov, 480p-4k, up to 200MB. The output keeps its aspect ratio and length. Real human faces are blocked by the provider's content policy.

auto_resizeoptional

boolean

Automatically resizes an input image that falls outside the provider's accepted range (300-6000px per side, aspect ratio 0.4-2.5, 30MB) so the request succeeds instead of being rejected. Aspect ratio is preserved: oversized images are downscaled, undersized ones upscaled, and out-of-band ratios padded rather than cropped. On by default - set it to false to have the provider reject out-of-range images instead. When a resize happens the response carries an X-Input-Normalized header naming the field and the before/after dimensions.

Default: true

bitrate_modeoptional

string

Output video encoding bitrate. 'standard' gives smaller files and faster downloads; 'high' produces ~5-6x higher bitrate for better visual fidelity and fewer compression artifacts (larger files). Does not affect price.

Default: "standard"

Allowed values :

Standard→"standard"

High→"high"

generate_audiooptional

boolean

true keeps the clip's soundtrack (a silent clip gets generated sound; an audio edit in the prompt changes it). false delivers the video with no audio track at all, not the original audio.

Default: true

output_codecoptional

string

Codec of the delivered file. 'auto' returns the model's own encode untouched - for seedance-2.5 at 1080p that is 10-bit HEVC, the highest-fidelity master, which Chrome and Firefox on Windows cannot decode and will play as audio over a blank frame. 'h264' re-encodes it to H.264 High 8-bit yuv420p, which plays everywhere, at the cost of one additional generation of compression and half the bit depth; pick it for browser embeds and previews, and leave it on 'auto' when the file goes into an edit or grade. Output that is already H.264 (720p, 480p, the 2.0 series) is never re-encoded either way. Adds a few seconds when it applies, and does not affect price.

Default: "auto"

Allowed values :

"auto""h264"

output_formatoptional

string

mp4 = best compatibility. mov (H.264 + yuv444p + PCM) = higher color fidelity; recommended for video editing/extension round-trips.

Default: "mp4"

Allowed values :

"mp4""mov"

reference_audiosoptional

string[]

Up to 10 reference audio files (MP3, 2-30 seconds each, 30 seconds combined, max 15MB each). Cite as '@Audio 1' in your prompt. Audio-only reference is supported on seedance-2.5.

reference_imagesoptional

string[]

Up to 30 reference images (max 30MB each) for character/style consistency. Cite as '@Image 1', '@Image 2' in your prompt. Cannot be used together with first_frame_url.

resolutionoptional

string

Output resolution. seedance-2.5 supports 480p, 720p and 1080p (24fps). Use 480p for drafts and fast iteration, 720p for final renders, 1080p for the highest fidelity (10-bit colour). Higher resolution costs more (token-based).

Default: "720p"

Allowed values :

"480p""720p""1080p"

return_last_frameoptional

boolean

Returns the final video frame as a separate image, delivered in the response as `video.last_frame_url`. Chain shots by feeding that URL into the next generation's `first_frame_url`. Note this is an output: it is distinct from the `last_frame_url` input parameter, which is an image you supply to steer how the clip ends.

Default: false

seedoptional

integer

Reproducibility seed. Use -1 for random output, set a fixed value to iterate on the same scene.

Default: 42Range: -1 - 2147483647

skip_moderationoptional

boolean

Bypass the upstream content moderation pre-filter. Useful when generating artistic content or faces that may trigger false positives. Baseline safety policies still apply.

Default: true

Response Type

Returns: Video

Asynchronous requests (v2)

Use Async for video, long-running (>~60s), or high-concurrency workloads; Sync is simplest for fast image & LLM calls. Async submits a request and you poll it to completion.

1
POST /v2/seedance-2.5-edit
Submit — returns request_id, status_url, response_url
2
GET /v2/requests/{id}/status
Poll — until COMPLETED or FAILED
3
GET /v2/requests/{id}
Result — final response body

Status states

QUEUED— Accepted, waiting for a worker

PROCESSING— Running on a worker

COMPLETED— Done — result body is ready

FAILED— Errored (incl. content/RAI blocks)

A FAILED request is served as HTTP 422 — the body still carries the error detail.
An unknown or expired request_id returns HTTP 404.
Results are retained for 1 hour, then expire.
Content / RAI blocks surface as FAILED, not a separate state.
Track completion by polling the status endpoint.

Common Error Codes

The API returns standard HTTP status codes. Detailed error messages are provided in the response body.

400

Bad Request

Invalid parameters or request format

401

Unauthorized

Missing or invalid API key

403

Forbidden

Insufficient permissions

404

Not Found

Model or endpoint not found

406

Insufficient Credits

Not enough credits to process request

429

Rate Limited

Too many requests

500

Server Error

Internal server error

502

Bad Gateway

Service temporarily unavailable

504

Timeout

Request timed out