Vidu Q4 Review: References, Native Audio and 4K Workflows

Vidu Q4 Preview is a practical option to explore for short scenes built around supplied images: a product moving through a reveal, a character delivering a line or a visual beat for a larger sequence. Its appeal is the combination of reference inputs, sound and a choice of output resolutions.

The strongest reason to try it is a concrete brief that those controls help express. Start with a subject you can identify clearly, one main action and an ending you can review. A long list of unrelated actions makes it harder to tell what needs fixing.

Treat the result as a shot to assess before publishing. Maximum resolution does not establish identity consistency, accurate lettering, believable contact or correctly timed speech.

The limits above describe this website. The Q4 Preview user guideline describes up to 15 image references; this Studio currently accepts 12. Use the limits displayed in the form when preparing an upload.

The Q4 Preview user guideline describes improvements in camera movement, instruction following, lighting, fast motion and expressive dialogue. It also lists 2K and 4K output and 10-bit color. These are documented model capabilities, not results established by our three examples.

Our recorded examples use single-image input at 720p. They let you inspect one dialogue scene, one product camera move and one object handoff. They do not test multi-image consistency, voice-reference matching, 4K delivery or 10-bit export. The guideline labels its release as Preview and closed beta; that wording alone does not establish current availability for every provider.

For an advertisement, begin with the product detail that must remain recognizable. For a short drama, isolate one speaker and one story beat. For a social clip, establish the target framing before generation. For film coverage, plan how the opening and closing frames connect to neighboring shots. These are suggested production checks; we have not benchmarked those use cases. See the user guide for the controls and a reproducible first attempt.

These three examples were created specifically for this Review and are separate from the Q3/Q4 comparison set. Each starts from its own AI-generated source image. Expand the prompt below each player to see the exact generation brief.

The settings were Image to Video, 6 seconds, 720p, native audio on and prompt enhancement off. The original exports measure 1278 × 720 and approximately 6.04 seconds, with an audio track in every file.

The dialogue scene asks for a short whispered warning in daylight. The product scene asks for a slow camera arc around an amber perfume bottle. The station scene asks two characters to hand over a briefcase while keeping the handle and hands visible.

Watch each complete clip and inspect the action against its prompt. These individual examples do not establish a repeatable success rate, a lip-sync accuracy score or a measured generation speed.

A reference set should resolve decisions about the shot. One image might establish identity; another might clarify clothing or the product’s side profile. Before uploading, write a short note explaining what each file contributes.

Start with a small, consistent set. Conflicting faces, lighting directions or product versions introduce ambiguity. Adding more files is useful only when those files explain something the existing references leave unclear.

For voice references, choose clean recordings and state who should speak. Avoid filling the allowance simply because more slots are available. Review the final voice as part of the scene, including its pace and relationship to the visible performance.

An image already describes much of the subject’s appearance. Use the prompt to explain the change: what moves, how the camera behaves and what should be heard. Put the important action before decorative mood words.

Example brief: “The ceramic cup stays on the table. The camera moves slowly closer as steam rises. Soft daylight remains steady. Quiet room ambience; no speech.”

This is a suggested starting prompt, not the prompt behind a supplied example. It has a clear object, a limited camera move and a sound instruction. You can evaluate each part separately after generation.

If a take misses the mark, revise the smallest part of the brief that addresses the problem. Keep a copy of the previous version so that a useful result does not disappear into an unrecorded series of changes.

A dialogue shot has several separate jobs. The character needs to remain recognizable, the words need to be understandable, and the timing needs to feel appropriate for the scene. Review those requirements separately before deciding whether the whole take works.

Start with one speaker and a short line. Write the exact words in the prompt, then specify the intended delivery: a quiet response, a surprised interruption or a matter-of-fact explanation. A description such as “emotional speech” leaves more decisions unresolved than a specific instruction about pace and emphasis.

Suggested test prompt: “The character pauses, looks toward the doorway and quietly says, ‘You came back.’ Keep a steady medium close-up. A brief silence follows the line. Low room ambience.”

Listen once without judging the image. Then watch the face and replay the opening and closing sounds of the line. Check whether gestures support the delivery or distract from it. If the line runs past the available time, shorten the sentence before adding more actions. This is a review method, not a claim that the supplied dialogue example passed these checks.

For commercial concepts, define which details make the subject identifiable. A bottle might depend on its cap, silhouette and label placement. An outfit might depend on a seam, sleeve length or fabric pattern. Write those requirements down before judging the overall polish of a take.

A first draft can isolate one movement: a small camera arc around a stationary product, or a model turning enough to show the garment’s side. Save a more complicated combination of movement, lighting changes and scene transitions for a later attempt.

Suggested test prompt: “The handbag stays upright on the pedestal. The camera moves slowly from the front to a slight side angle. Keep the handle shape and clasp position consistent. Soft, steady studio light; no speech.”

Inspect the details when they move toward the edge of the frame or become partly hidden. Those moments can matter more than the opening pose. If exact text or a logo is essential, reserve space for a controlled overlay in your editor and check the final composition at the size where it will be published.

A useful story beat has a visible change. A character notices something, reaches a decision or moves from one position to another. Describe that change before adding camera language. If the ending is unclear in the brief, it is difficult to judge whether a visually attractive clip actually advances the scene.

For an early attempt, keep the geography simple. Establish where the character begins, what they interact with and where they should finish. A slow approach to a doorway can be easier to evaluate than several actions distributed across different rooms.

Suggested test prompt: “The character stands beside the window, notices a light outside and turns toward it. End with the character looking through the glass. A restrained camera move, steady dusk lighting and quiet wind.”

When assembling several clips, compare the closing frame of one with the opening of the next. Check costume, screen direction and lighting. The current Studio has no timeline for joining shots; plan that step in your editor. The goal of a draft is a usable piece of coverage, not necessarily a complete finished scene.

Resolution and scene correctness answer different questions. A smaller draft can help you decide whether the action happens in the right order. A higher-resolution render helps you inspect the material intended for delivery. Neither replaces the other.

Do not assume that increasing resolution preserves every detail from an earlier attempt. Review the new export as a separate result. Record its settings and keep the draft that informed the decision.

An example displayed in a web player cannot establish the properties of every output setting. If a project requires a particular file dimension, inspect the downloaded file rather than relying on the player’s visible size.

Before submitting, define one acceptance criterion: the cup remains on the table, the character finishes facing the doorway, or the spoken line is easy to understand. A clear criterion makes a rejected take useful because it identifies a specific next action.

1. Keep the first brief. Save the prompt, selected mode, resolution, duration and reference files.
2. Name the main problem. Describe the first failure that prevents you from using the clip. Avoid rewriting everything because one detail missed the mark.
3. Change one instruction or input. Simplify the action, remove a conflicting reference or clarify the ending.
4. Compare the original exports. Check whether the change resolved the problem without losing an earlier success.
5. Keep useful versions. A previous take may still supply a reaction, an insert or a cleaner ending for the edit.

If checking is interrupted, resume the existing task before starting another attempt. The Studio’s progress percentage is an estimate that waits at 95%; it is not a live measurement of model completion. Only the returned video establishes that the generation is ready.

The useful advantages are the controls you can put to work: supplied images to establish a subject, optional voice references, audio generation and several output resolutions. They make it possible to express a short scene through both visual material and a written brief.

The main tradeoff is review effort. A take may convey the intended mood while still missing a small detail that makes it unsuitable for the deliverable. Decide in advance which variations are acceptable and which require another attempt or a conventional edit.

These are workflow recommendations, not measured rankings. For the differences that matter when moving from an older setup, see Vidu Q4 vs Q3.

Exact details need review. Small labels, jewelry, fingers and reflected objects can matter more to a client than the overall atmosphere. Include these in your acceptance checklist.

Sound needs a separate listen. Review pronunciation and timing without relying on a convincing still frame. If a spoken line is too dense for the shot, shorten the line or give the performance more time.

A clip is only part of a sequence. For a longer film or advertisement, plan shot boundaries and an editing workflow. The current Studio does not provide a timeline editor, uploaded video editing or a pure text-only mode.

Preview behavior may change. Keep the selected settings and original output with your project files, particularly when a later revision needs to match an earlier shot.

The useful cost is the cost of a shot you can use, including revisions. This site’s rate is based on duration and resolution; a five-second 720p draft is 15 credits, while a ten-second 4K generation is 80 credits.

Use a short draft to settle an uncertain action before requesting a larger export. Higher resolution can help delivery, but it does not repair a wrong camera path or a scene that never reaches the intended ending.

The current one-time packs are Starter, Plus and Professional. See pricing for the current amounts and features. These are this site’s rates, separate from the model provider’s API billing.

Example scene budget: two five-second 540p drafts use 10 credits in total. One ten-second 1080p generation adds 40 credits, giving a planned total of 50 credits for those three attempts. Another final attempt adds another 40 credits. This is arithmetic for the selected settings, not a promise that three attempts will produce an approved shot.

Before committing a larger pack, identify the recurring work: how many scenes you need, how many draft attempts you expect to review and which resolution the final delivery requires. Track usable shots alongside credits spent. That record is more useful for planning the next project than the cost of a single attractive example.

Try it if you can supply a clear image or reference set and want to explore a short moving scene with optional sound. Product concepts, character moments and individual narrative shots are useful starting briefs because each can have a specific acceptance criterion.

Keep conventional editing or compositing in the plan when the deliverable depends on exact typography, a fixed logo or a precise match to existing material. Use the generated scene for the parts it handles acceptably, then review the complete deliverable in its final context.

Read Q4 vs Q3 if you are deciding whether to change an existing workflow. If you are ready to make a draft, the step-by-step guide follows the controls available in this website’s Studio.