Wan 2.1 Keyframe-To-Video Plus generates smooth video transitions between two keyframe images. Provide a starting and ending frame, and the model creates a coherent 5-second video interpolation at 720P.
Key Features
Dual keyframe input — Set both first and last frame for precise control over the video
720P output — High-quality video at 30fps
Video effect templates — Optional effects for enhanced visual output
Intelligent prompt rewriting — Automatic prompt optimization for better results
Pricing
Per Second $0.10
Parameters
seedinteger
Random seed [0, 2147483647].
imagestring* required
First keyframe image (URL or Base64). Supported formats: JPEG/JPG/PNG/BMP/WEBP, 360-2000px, ≤10MB.
promptstring* required
Transition and motion description between the first and last frame (max 800 characters).
durationEnum
Video duration in seconds (30 fps). Fixed at 5 seconds.
Possible values: 5
templatestring
Optional video effect template name.
last_framestring* required
Last keyframe image (URL or Base64). Same constraints as the first frame.
resolutionEnumDefault: "720P"
Output Resolution
Possible values: 720P
prompt_extendbooleanDefault: true
Enable intelligent prompt rewriting.
safety_filterbooleanDefault: true
Enable content safety filter. Defaults to true. Set to false to disable content safety inspection.