Seedance 1.5 Pro Image to Video

ByteDance Seedance V1.5 Pro Image-to-Video

Seedance V1.5 Pro (Image-to-Video) turns a single reference image into a short video clip, using your prompt to guide motion, camera behavior, and overall style. It’s a practical choice when you want to “bring a keyframe to life” while keeping the original composition as an anchor.

This wrapper is best for short, shot-based generations: portraits with subtle motion, product shots, scenic pans, and cinematic beats where prompt-controlled camera and action matter.

Key capabilities

• Image-conditioned motion generation Animates a still image into a coherent clip, aiming to preserve the subject and scene layout while introducing natural movement.

• Prompt-controlled action and camera Handles prompts that describe what moves and how the camera behaves (e.g., “slow dolly-in,” “handheld feel,” “locked-off tripod shot”).

• Flexible output framing Supports common aspect ratios for landscape, vertical, and square content, so you can target feeds, stories, and banners.

• Quality / cost tuning via resolution and duration Lets you trade off speed, cost, and visual detail by adjusting resolution and clip length.

Parameters and how to use

• prompt: (required) The instruction describing what should happen in the video (action + camera + style).
• image: (required) The reference image that anchors composition, subject identity, and lighting.
• last_image: An optional ending frame to steer the final composition (if supported by your deployment).
• duration: Video length in seconds.
• resolution: Output resolution (commonly 480p / 720p / 1080p).
• aspect_ratio: Output aspect ratio (e.g., 16:9, 9:16, 1:1, 4:3, 3:4, 21:9, or auto).
• camera_fixed: Whether to keep the camera position fixed (useful for “locked tripod” shots).
• seed: Random seed for reproducibility. Use a fixed seed when iterating.
• generate_audio: To decide whether to generate videos with audio.

Prompt

Keep prompts shot-focused and concrete. A reliable structure:

1. Subject & setting — who/what, where, time of day
2. Action — clear verbs (“turns,” “walks,” “waves,” “wind blows”)
3. Camera — “locked-off,” “slow dolly-in,” “orbit,” “tilt up,” “handheld”
4. Look — “cinematic,” “35mm film,” “soft rim light,” “high contrast,” “anime cel-shaded”

Example

“Close-up portrait in soft window light. The subject slowly turns toward camera and smiles. Subtle handheld feel, shallow depth of field, cinematic color grade, film grain.”

Tips

• Prefer one shot per prompt. If you need multiple beats, write them in order with short sentences.
• If you see unwanted camera drift, set camera_fixed: true and describe a locked-off camera in the prompt.

Media (Images)

• Upload a clear, high-quality JPG/PNG as image.
• If you use last_image, choose an end frame with similar framing and lighting to reduce jumpy transitions.

Other parameters

• duration Start short for iteration. Increase length only after motion and framing look right.

• resolution Use 480p for fast previews, 720p for a balance of detail and cost.

• aspect_ratio Match your target platform:

  • 16:9 for landscape and cinematic shots
  • 9:16 for vertical shorts / stories
  • 1:1 for square feeds
  • 4:3, 3:4, 21:9 for specific layouts

• generate_audio Turn it on to speci to generate audio or not.

• seed Set a fixed seed to compare prompt changes more fairly. -1 means a random seed will be used.

After you finish configuring the parameters, click Run, preview the result, and iterate if needed.

Pricing

Pricing is parameter-related.

What this means in practice:

• Cost scales linearly with duration.
• resolution: "720p" costs ~2.17× the non-720p branch (1 / 0.461538).
• generate_audio: true costs 2× generate_audio: false.

Notes

• Match aspect ratios. If your input image is strongly vertical, pick a vertical aspect_ratio to avoid awkward crops or stretched motion.
• Reduce flicker with simpler motion. If you see temporal artifacts, lower the motion intensity in the prompt and keep the camera simpler (or set camera_fixed).
• Iterate cheaply. Start at 480p + shorter duration, then scale up once the motion and framing are correct.

Related Models

• Seedance V1 Pro Fast (Image-to-Video) – Faster iterations with a strong speed/quality balance.
• Seedance V1 Pro I2V 720P – A stable 720p I2V option for consistent results at mid cost.
• Seedance V1 Pro I2V 480p – Lower-resolution I2V for rapid prototyping and budget runs.
• bytedance/seedance-upscaler – Upscale an existing clip when you like the motion but need higher fidelity.