How each one works
Text-to-video reads your description (subject, action, camera, style) and synthesizes every frame. You get maximum creative freedom but less control over exact appearance. Image-to-video starts from a fixed first frame — your photo — and predicts realistic motion forward, so the look stays anchored to your source.
When to use which
Use text-to-video for concept clips, b-roll, abstract or stylized scenes, and ideas where you don't have a reference image. Use image-to-video for product demos, animating a logo or poster, bringing a model photo to life, and any case where brand or character consistency matters.
Quality tips that apply to both
Write concrete prompts: name the subject, one clear action, the camera move, and the mood. Keep clips short (4–8s) for the most stable motion, pick the aspect ratio for your channel up front (9:16 for Reels/TikTok, 16:9 for YouTube), and upload high-resolution source images for image-to-video to avoid blur.
One model, both modes
Modern models such as ByteDance Seedance 1.5 Pro support both text-to-video and image-to-video, so you can prototype an idea from text and then lock it down from a chosen frame — without switching tools.
Text-to-video vs image-to-video at a glance
| Dimension | Text-to-Video | Image-to-Video |
|---|---|---|
| Input | Text prompt only | A photo (+ optional prompt) |
| Best for | New scenes, concepts | Product/brand consistency |
| Control of look | Lower | Higher (anchored to image) |
| Typical use | Ads, b-roll, ideas | Product demos, listings |
Frequently asked questions
Is image-to-video more realistic?
It is more consistent with your source, which usually reads as more realistic for products and people because the appearance is anchored to a real photo.
Which is better for e-commerce?
Image-to-video, because you keep the exact product. Animate your main image or a clean product shot into a short motion clip for listings and ads.
How long should AI clips be?
4–8 seconds gives the most stable motion. Stitch several short clips for longer sequences rather than generating one long take.
Can one tool do both?
Yes. Models like Seedance 1.5 Pro support both modes, so you can move from a text concept to an image-locked final in the same workflow.
Do I need a high-resolution image?
For image-to-video, yes — a sharp, high-resolution source reduces blur and artifacts in the generated motion.
What aspect ratio should I pick?
Match the channel: 9:16 for TikTok/Reels/Shorts, 16:9 for YouTube and landing pages, 1:1 for feed posts.
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