WAN 2.7 - Create video from reference characters

post /v1/ai/reference-to-video/wan-2-7 Generate a video featuring characters from reference images or videos using WAN 2.7. Maintains visual identity of referenced characters across the generated video.

How to use references:

• Provide character images via image_urls and/or character videos via video_urls
• Combined total of image and video references must not exceed 5
• Reference characters in the prompt as "Image 1", "Image 2", "Video 1", etc.
• Optionally include reference_voice per character for voice-guided generation

Key features:

• 720P and 1080P resolution support
• 5 aspect ratio options (or use start_image_url to set aspect ratio from an image)
• Duration range: 2-10 seconds