Seedance 2.5 First & Last Frame - Control Start and End
Use Seedance 2.5 first and last frame control to set exactly how a clip begins and ends. Build the API request with first_frame and last_frame images free.
Describe your scene — Seedance 2.5 generates up to 30 seconds of native audio-visual output.
Tip: put spoken dialogue in "double quotes" for better synced audio.
a cinematic scene. with natural ambient sound.
{
"model": "dreamina-seedance-2-5-260628",
"content": [
{
"type": "text",
"text": "a cinematic scene. with natural ambient sound."
}
],
"resolution": "720p",
"ratio": "16:9",
"duration": 10,
"generate_audio": true,
"camera_fixed": false,
"output_format": "mp4"
}Your files are processed locally in your browser. Nothing is uploaded to any server.
How to Use First & Last Frame
Pick Image to Video
Switch to Image to Video mode. Your starting image becomes the first_frame — the exact frame the clip opens on.
Add an Optional Last Frame
Enable the last frame to define where the shot ends. Seedance 2.5 interpolates a smooth, controlled motion between your first and last frames.
Describe the Transition
Write what should happen between the two frames, then copy the API request. Add image URLs to the first_frame and last_frame content roles and generate.
First & Last Frame FAQ
How does first and last frame control work?
In the content array you provide an image with the role first_frame and, optionally, another with the role last_frame. Seedance 2.5 opens on your first frame and animates a smooth path toward the last frame, so you control both ends of the shot rather than just the start.
Do I have to set a last frame?
No. The last frame is optional. With only a first frame you get standard image-to-video animation. Adding a last frame is useful for precise transitions, product reveals, and matching cuts between shots.
Can I keep the character consistent between frames?
Yes. Seedance 2.5 is built for consistency, and providing both endpoints plus a clear motion description keeps the subject stable. For extra control you can also add reference_image items to lock in a character or product.