Animate a single still image into a 4-30 second 720p cinematic clip with optional synchronized native audio using ByteDance Seedance 2.5 Image to Video on RunComfy. Documents the four-field schema (prompt, image, duration, generate_audio), the $0.35/s pricing, the fact that output aspect ratio follows the input image, and when to route to the Seedance 2.5 480p, text-to-video, reference-to-video or
