Give the opening frame one clear task
AI TikTok Video Generator for Short Clips
The AI TikTok video generator makes a 5–15 second visual clip that you can download and edit into your post. Start with a photo or describe a scene. Add captions, voiceover, music, and the final edit outside H3 Max, then upload through your own account.
Generate a vertical clipWhat should a viewer see immediately?
A mug entering view, a light moving across a surface, and a camera revealing a room are different openings. Pick the one that fits the sentence or product you plan to introduce. Trying to fit all of them into a single short shot leaves less time to understand the subject.
For a desk scene, begin with the useful object already visible. If the post is about keeping a work surface clear, a quiet view of the open desk can establish the idea before you add a caption. The AI TikTok video generator supplies the footage; your edit decides when the explanation appears.
Judge the first frame with playback stopped. If the viewer needs two seconds of camera travel to discover the subject, reconsider where the shot begins. Motion should add information to a readable composition.
Composition sketch
Keep the essential subject in the central area. Reserve some space around the top, bottom, and right edge for the publishing interface. This page's guidance is a planning reference, not a universal safe-zone template baked into your export.
Choose an opening before choosing a longer duration
A useful comparison changes one visual decision. Keep the same source, intended caption, and overall duration, then compare a direct opening with a gradual reveal. Label these as creative alternatives in your editing notes. They are not predictions about reach or audience response.
Opening A: the subject is already there
Place the item clearly in the first frame and let a small camera move bring the viewer closer. This gives an editor a recognizable frame for a caption or a cut. Watch whether the move keeps the whole relevant feature visible rather than drifting into a crop that loses it.
Opening B: make room around the subject
Start with enough of the object to identify it, then move back to make space around it. The existing surface becomes a place for text you can add in your editor. Avoid asking a single front photo to reveal an unpictured mechanism or an unseen back label.
Both bottle exports are square because the source photo is square. Compare the two openings here, then prepare a portrait source for a vertical version. Neither example includes an offer or captions.
Prepare the vertical frame at the input
When using Image to Video, crop your reference to the intended vertical composition before upload. Output follows the image ratio. A horizontal photograph will not become 9:16 just because you opened the AI TikTok video generator. Cropping first also lets you see whether the main subject survives the narrower frame.
Text to Video has a ratio control, so choose 9:16 when creating a vertical scene from a description. Describe one setting and one simple movement. For a named product with a specific appearance, a reference photo gives you something concrete to compare against the result; a text-only scene should not be presented as an exact view of that SKU.
Leave room for the actual words you intend to add. A long two-line caption needs a different composition from a short label. Check the publishing preview because interface elements vary by placement and caption length. The aspect ratio guide explains which input controls determine the frame.
Generate a vertical clip from your photo
The video aspect ratio follows your image.
0 / 50,000Sign up for 40 free credits—enough for a 5-second video at 768P.
Use the AI TikTok video generator for a simple opening
In the AI TikTok video generator's image workflow, describe how the existing scene should move. The photo already establishes the subject. A short camera instruction is easier to evaluate than a paragraph asking for several scene changes, dramatic lighting, and new objects at once.
The example is a starting instruction for a prepared vertical desk photo. It is not a transcript of a completed generation or evidence that the output will match every word. Review the result for shifting object edges and any movement that distracts from the empty workspace.
Product Agent is another route when you have a product photo and prefer an automatically prepared prompt. It still follows the source ratio. Use the product showcase workflow for that mode, then bring the downloaded clip into the same editing sequence.
Vertical desk opening
The camera makes a slow, small push toward the clear center of the desk. The objects remain in place. Soft daylight stays steady throughout the shot.
Prepare the source as a vertical image first. This prompt does not crop the photo, add captions, or create a complete TikTok.
Use this promptMake a short candidate, then watch the opening again
Choose 5–15 seconds and 480P or 768P. Check the credit amount before you submit. A five-second candidate is enough to inspect a simple opening, but you may need a longer source if the edit includes a deliberate pause. Select duration for the shot you need rather than assuming a longer clip will be more useful.
Watch the completed clip once at normal speed. Then inspect the first frame and the point where your caption would appear. The AI TikTok video generator does not add that caption, so test it in the editor at the size you expect to publish. Do not approve a composition using an empty frame if the finished post will cover it with text.
Download the candidate you intend to edit and check its actual pixel dimensions. A 768P label alone does not establish a particular vertical width and height. If you change the crop or export settings outside H3 Max, inspect that final file again.
Keep organic posts and advertising checks separate
For an organic post, use the current TikTok upload preview to check framing, cover choice, captions, and sound. Add only audio you have permission to use, and follow the publishing interface's current content disclosures. H3 Max does not submit the post or select those settings for you.
For paid placement, consult the requirements for the exact ad format. TikTok's auction In-Feed guidance reviewed September 5, 2026 recommends 9:16 and at least 540 × 960 pixels for vertical creative. Its safe-zone guidance varies with ratio, captions, and added formats. Those advertising specifications should not be presented as the complete rules for every organic post.
The AI TikTok video generator does not certify exports for an ad placement. Compare the final file properties and layout with TikTok's current In-Feed ad specifications before uploading to an ad workflow.
Before you generate another opening
Will this create a complete captioned TikTok?
No. The AI TikTok video generator creates the short video footage. H3 Max does not include automatic captions, voiceover, a full timeline editor, or account publishing. Keep your planned text and audio available in the editor where you finish the post.
Can I compare two openings fairly?
Keep their product, caption, and intended audience consistent, then record exactly which opening changed. Any publishing experiment still needs your own results. H3 Max does not predict which version will perform better or provide evidence of an algorithm preference.