BYTEDANCE

The Bytedance Image to Video Pro v1.5 (Seedance 1.5 Pro) model is a state-of-the-art image-to-video synthesis model that transforms still images into cinematic video clips with synchronized audio. Designed for creative and commercial applications, Seedance 1.5 Pro enables users to animate a static image by generating not only visually compelling motion but also dialogue and audio effects that align with the video content.

A standout feature of this model is its dual-frame conditioning. Users upload a required start frame image (defining the subject, pose, lighting, color, and style) and can optionally upload an end frame image to specify the final composition. The model generates a fluid, temporally consistent animation that transitions from the start to the end frame, with camera movement and character actions dictated by a text prompt. This workflow allows for highly controlled and creative animations, making Seedance 1.5 Pro suitable for use cases ranging from photorealistic portrait animation to dynamic product reveals and storyboard-to-video conversions.

The model supports mixed input modalities, requiring both an image and a text prompt for every generation. Prompts let users describe actions, dialogue (using in-quote text for speech), emotional tone, camera maneuvers (like panning, zooming, or tracking), and audio cues (such as background scores or sound effects). This prompt-driven approach allows for granular control over the generated content, ensuring the animated sequence matches the creative vision from start to finish.

Seedance 1.5 Pro is tailored for a variety of users, including content creators, advertisers, animators, storytellers, and social media producers. Documented use cases demonstrate its versatility: animating static photos or concept art, breathing life into character illustrations with lip-synced performance, crafting product highlight videos that transition smoothly between hero shots and packaging, defining scene transitions for ads or music videos, and testing storyboards by converting sequential art into rough motion cuts. Social content creators can animate memes or portraits into shareable clips with synchronized sound, while virtual avatar projects benefit from its ability to turn single headshots into natural talking-head videos.

Technically, Seedance 1.5 Pro supports output videos up to 1080p resolution with a maximum duration of 12 seconds. Multiple aspect ratios are available, including 21:9, 16:9 (default), 4:3, 1:1, 3:4, and 9:16, accommodating a wide range of output formats. Supported input image types include jpg, jpeg, png, webp, gif, and avif, accepted via drag-and-drop, clipboard paste, or direct URL. Video output is in MP4 format (H.264) with mixed audio (dialogue, sound effects, score) in 48 kHz AAC. Additional controls include fixed or animated cameras, adjustable duration (4–12 seconds), selectable resolution (480p for faster drafts, 720p for refined output), audio generation (enable or mute), and explicit random seed setting for reproducibility.

A core strength of the model is its attention to character consistency across generated frames: subjects, facial expressions, and clothing from the start frame remain stable throughout the animation. When both start and end frames are provided, the model generates a motion path that lands exactly on the specified final composition, supporting creative direction for complex shots and transitions. Camera movement is also highly flexible and can incorporate cinematic motifs such as pans, tilts, zooms, dollies, or even orbiting shots when described in the prompt. If a tripod-style shot is desired, the camera_fixed parameter locks the frame.

Best practices highlighted in the documentation include keeping the same subject and aspect ratio between start and end frames for smooth transitions, focusing prompts on describing motion and audio (since the start frame already defines scene details), and using explicit dialogue in quotes to drive natural speech and lip synchronization. The motion between frames is generated in latent space rather than simple image interpolation, ensuring more realistic physics and organic camera effects.

In summary, Bytedance Seedance 1.5 Pro stands out for its highly controllable image-to-video synthesis, blending visual animation and native audio to bring static assets to life in a format suitable for modern storytelling, marketing, and digital art production. Detailed configuration options, cinematic camera capabilities, and robust character consistency further enhance its creative potential.