Seedance

Seedance 2.5 is a multimodal video model from ByteDance that generates synchronized video and audio in a single generation pass. Traditional pipelines require you to generate silent video files and source Foley tracks separately in post-production. Seedance produces native sound effects and ambient tracks matched directly to the movement on screen. The system supports up to 30 seconds of continuous footage in a single render, with the option to extend clips twice to build longer sequences. Instead of relying purely on descriptive text prompts, the model accepts reference video inputs. It analyzes the framing, camera trajectory, and pacing of the reference asset and maps your target subjects into the scene. Localized editing tools allow you to modify specific visual or auditory elements within an existing clip without rerolling the entire generation. This tool is designed for commercial animators, visual effects artists, and production teams who need granular directorial control. It replaces guesswork with deterministic camera motion and timing derived from source footage, making it useful for multi-shot storyboards and commercial video mockups.