bytedance/seedance-1.5-pro

A joint audio-video model that accurately follows complex instructions.

Capabilities

Reference Images Seed

Community model (estimated from hardware time)

Name	Type	Description	Default	Constraints
`prompt` *	string	Text prompt for video generation	`—`	—
`aspect_ratio`	string	Video aspect ratio. Ignored if an image is used.	`"16:9"`	16:9 4:3 1:1 3:4 9:16 21:9 9:21
`camera_fixed`	boolean	Whether to fix camera position	`false`	—
`duration`	integer	Video duration in seconds	`5`	min: 2, max: 12
`fps`	integer	Frame rate (frames per second)	`24`	24
`generate_audio`	boolean	Generate audio synchronized with the video. When enabled, the model outputs a video with audio that matches the visuals.	`false`	—
`image`	string (uri)	Input image for image-to-video generation	`—`	—
`last_frame_image`	string (uri)	Input image for last frame generation. This only works if an image start frame is given too.	`—`	—
`seed`	integer	Random seed. Set for reproducible generation	`—`	—

prompt required string

Text prompt for video generation

aspect_ratio string

Video aspect ratio. Ignored if an image is used.

Default: "16:9"

16:9 4:3 1:1 3:4 9:16 21:9 9:21

camera_fixed boolean

Whether to fix camera position

Default: false

duration integer

Video duration in seconds

Default: 5 min: 2, max: 12

fps integer

Frame rate (frames per second)

Default: 24

generate_audio boolean

Generate audio synchronized with the video. When enabled, the model outputs a video with audio that matches the visuals.

Default: false

image string

Input image for image-to-video generation

last_frame_image string

Input image for last frame generation. This only works if an image start frame is given too.

seed integer

Random seed. Set for reproducible generation

Version: 78c1986fecf4 Updated: 6/26/2026 2.7M runs