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Choose the frame shape before you write a Wan 3.0 prompt. Then select a resolution tier that your delivery platform and account support, divide the clip into short time-coded beats, and describe what the camera sees in each beat. Alibaba Cloud’s current Wan 3.0 documentation lists 480P, 720P, and 1080P output, six fixed ratios (21:9, 16:9, 4:3, 1:1, 3:4, and 9:16), adaptive ratio, clips from 2 to 30 seconds, and a smart-duration option. It also documents single-shot and multi-shot storyboard prompts with roughly 4–6 seconds per shot.
The settings are product specifications, not a promise that every generated frame will follow a prompt exactly. Exact dimensions, limits, model names, and regional availability depend on the service you use. The examples below use Alibaba Cloud’s documented options and identify Leonardo.AI’s pixel table as an implementation-specific example rather than a universal Wan 3.0 standard.
What an AI video ratio controls
An aspect ratio is the relationship between a frame’s width and height. A wide ratio gives the composition more horizontal room; a portrait ratio gives it more vertical room; a square gives equal width and height. In Wan 3.0, the ratio affects where a subject can stand, how much background is visible, and whether movement travels comfortably across the frame.
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| Ratio | Frame orientation | Practical planning question |
|---|---|---|
| 21:9 | Ultrawide landscape | Does the scene need a very broad horizontal composition? |
| 16:9 | Standard landscape | Will viewers watch on a conventional horizontal player? |
| 4:3 | Less-wide landscape | Would a taller horizontal frame suit the subject better than 16:9? |
| 1:1 | Square | Must the composition work equally in width and height? |
| 3:4 | Portrait | Does the subject benefit from a moderately tall frame? |
| 9:16 | Tall portrait | Is the primary destination a vertical viewer? |
| Adaptive | Follows a supplied frame or reference | Are you using a first frame, last frame, or other source whose shape should be preserved? |
Alibaba Cloud recommends adaptive ratio for first-frame, first-and-last-frame, and reference-led workflows. If you are starting with text only, choose a fixed ratio deliberately instead of assuming the service will crop a finished landscape shot cleanly into portrait. The guidance to keep faces, products, and critical action inside the selected composition is an inference from frame geometry, not a vendor guarantee.
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How resolution tiers relate to actual pixels
Alibaba Cloud lists three output tiers: 480P, 720P, and 1080P. A tier name does not by itself establish one universal width and height across every Wan 3.0 host. Leonardo.AI’s Wan 3.0 API documentation supplies a concrete pixel matrix for its implementation and says explicit width and height take precedence over its resolution tier.
| Tier | 16:9 | 4:3 | 1:1 | 3:4 | 9:16 |
|---|---|---|---|---|---|
| 480p | 854 × 480 | 736 × 552 | 640 × 640 | 552 × 736 | 480 × 854 |
| 720p | 1280 × 720 | 1104 × 828 | 960 × 960 | 828 × 1104 | 720 × 1280 |
| 1080p | 1920 × 1080 | 1656 × 1242 | 1440 × 1440 | 1242 × 1656 | 1080 × 1920 |
These dimensions come from Leonardo’s API documentation checked in October 2026. They illustrate one provider’s mapping, not an independently measured benchmark or a guarantee for Alibaba Cloud, another host, or every region. Check the selected platform’s parameter reference before designing graphics at an exact pixel size. A 21:9 pixel matrix is not stated in that table, so do not infer one by scaling the 16:9 values.
Choose a ratio and tier before writing shots
Use this order when deciding settings:
- Identify the viewing destination. Decide whether the finished clip is primarily horizontal, vertical, square, ultrawide, or tied to a supplied image or video frame.
- Reserve space for the subject. A standing person, tower, or waterfall usually needs vertical headroom; a vehicle chase or group crossing needs lateral room. Keep the important action away from edges where a crop or reframing could remove it.
- Pick the lowest tier that meets the delivery need. Use 480P for a small preview or constrained workflow, 720P when you need a moderate-size deliverable, and 1080P when the destination and account support the larger output. These are tier labels from Alibaba Cloud, not a quality ranking measured by an independent test.
- Use adaptive ratio when the source frame is authoritative. This is the documented recommendation for first-frame, first-and-last-frame, editing, extension, and other reference-led jobs.
- Confirm the host’s controls. Some APIs expose a named tier, while others also accept explicit width and height. If both are present, follow that host’s precedence rule.
Duration and shot planning
Alibaba Cloud documents 2–30 seconds per request, output at 30 frames per second, and a smart-duration value of -1. Smart duration lets the service determine a length where that mode is supported; it is not the same as specifying a fixed runtime. A 30-second maximum applies to the documented request capability, not necessarily to a longer sequence assembled from multiple requests.
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The same guide describes single-shot and multi-shot storyboard formats with 4–6 seconds per shot and timestamp annotations. Treat that as a prompt pattern. It does not guarantee that a model will cut exactly at every timestamp or maintain a separate shot for every line.
For a 12-second clip, three beats are easier to control than one paragraph describing a dozen actions:
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- 0:00–0:04: establish the location and the subject’s starting position.
- 0:04–0:08: perform one clear action while the camera makes one stated move.
- 0:08–0:12: complete the action and hold a readable ending pose or view.
Keep each beat focused. If a character must walk, turn, pick up an object, speak, and leave in four seconds, remove steps or lengthen the clip. A time range tells the generator when an event should occur; it does not make complex choreography reliable by itself.
A prompt structure that gives Wan 3.0 usable context
The Wan 3.0 user guide recommends an ordered description covering duration and aspect ratio, subjects and references, scene and style, shot and motion, dialogue or sound effects, exclusions, and the timeline. Alibaba Cloud’s examples similarly separate camera, scene, action, and atmosphere. Use that order as a checklist rather than as a claim that every field is mandatory.
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- Output: state the fixed ratio or adaptive ratio, resolution tier if exposed, and duration.
- Subject: identify the main person, creature, object, clothing, colors, and any reference asset.
- Scene and style: describe the location, time of day, lighting, palette, and visual treatment.
- Camera: name the shot size and movement, such as wide shot, close-up, dolly forward, or a slow pan.
- Action: give one observable action in plain sequence.
- Audio: add dialogue, music, or sound effects only when they matter to the result.
- Exclusions: state unwanted text, extra limbs, logos, abrupt cuts, or other elements you need to avoid.
- Timeline: attach each action to a time range.
Example wording: 12-second 9:16 portrait video, 720P. 0:00–0:04, medium shot of a red-jacketed cyclist entering a misty forest path; camera tracks slowly left to right. 0:04–0:08, the cyclist brakes beside a wooden sign and looks toward the sunrise; maintain the same clothing and bicycle. 0:08–0:12, gentle push-in to the cyclist’s face, warm backlight, no captions or extra people. Add quiet tire noise and birdsong. This is an illustrative prompt, not a tested recipe or a quoted vendor example.
Step-by-step Wan 3.0 planning workflow
- Define the deliverable. Write down the destination, orientation, target duration, and whether an existing frame controls the shape.
- Check the platform parameters. Confirm the available Wan 3.0 model, region, endpoint, API key, ratios, tiers, and duration syntax. Alibaba Cloud warns that the model, endpoint, and API key must belong to the same region.
- Prepare the visual brief. Name the subject, setting, style, lighting, and details that must remain consistent. Remove decorative adjectives that do not affect the shot.
- Divide the runtime. Allocate roughly 4–6 seconds to each storyboard beat, then write timestamps that fit the total duration. Use fewer, clearer beats when the action is complicated.
- Specify camera and action per beat. State shot size, camera movement, subject movement, and the intended endpoint. Avoid asking for several independent camera moves in one interval.
- Add references and audio selectively. Identify each image, video, or audio asset and explain what it should control. Include dialogue or sound effects only if they are part of the deliverable.
- Generate, inspect, and revise. Check framing, continuity, timing, motion, speech, and unwanted elements. Revise the one failing beat instead of adding unrelated adjectives to the entire prompt.
Reference images, video, and audio
Wan 3.0 documentation describes first-frame control, first-and-last-frame control, and multimodal references using images, videos, and audio. These modes can help communicate a character’s appearance, a starting and ending composition, or a sound identity, but they introduce input limits and compatibility rules.
| Reference type or mode | Documented constraint | Planning implication |
|---|---|---|
| Reference images | Up to 10 images | Use only images that establish a visual fact you need to preserve. |
| Reference videos | Up to 5 videos, combined duration no more than 15 seconds | Trim examples to the motion or appearance that matters. |
| Reference audio | Up to 5 clips, combined duration no more than 15 seconds | Provide short, purposeful voice or sound references. |
| File or web-page-to-video reference | At most one file or one public web link | Choose the strongest source rather than sending several alternatives. |
| Mode compatibility | Reference/file/link modes cannot be combined with first/last-frame inputs in the same request | Choose one control strategy before submitting the job. |
The limits above belong to the Alibaba Cloud API guidance and may change. Verify them in the current regional documentation. For named references, the Wan3.io guide suggests labels such as @Image1, @Video1, and @Audio1; use the exact syntax accepted by your host and explain the role of each asset. An image should not be expected to dictate a video’s timing unless the selected workflow explicitly supports that control.
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Audio, dialogue, and frame rate
Alibaba Cloud states that the documented Wan 3.0 workflow can generate dialogue, background music, and sound effects, and that audio can be disabled with an audio setting. Decide whether sound is required before generation because a silent master may be easier to mix later, while native dialogue can be useful when lip movement and timing belong in the same request.
The same documentation specifies MP4 output at 30 frames per second. Frame rate is separate from resolution: increasing from 720P to 1080P does not change the documented 30 fps output. If your editor or delivery service expects another frame rate, plan a conversion step outside the generation request and check for motion changes after conversion.
Regional and implementation checks
Wan 3.0 features are not necessarily identical across hosted services or regions. Alibaba Cloud’s guide says exact supported models vary by region and requires the model, endpoint, and API key to be in the same region. Before preparing a large set of assets, verify:
- the Wan 3.0 model identifier available to your account;
- the endpoint and region selected by the console or API;
- which ratios, resolution tiers, duration values, and audio controls are enabled;
- whether the interface accepts a named tier, explicit dimensions, or both;
- current reference-count, file-size, duration, and compatibility limits;
- the returned file format and frame rate.
Leonardo.AI’s documentation is useful for understanding how one API exposes dimensions, but its values should not be copied into an Alibaba Cloud request without checking that platform’s schema. The same caution applies to third-party prompt guides: they can suggest organization and naming, but they do not establish a universal success rate.
Worked planning examples
Vertical product demonstration
Choose 9:16 when the product will be viewed in a tall player. Keep the product centered with enough space above and below for a hand to enter the frame. A 10-second plan might use a 0:00–0:04 locked medium shot, a 0:04–0:08 slow camera move as the lid opens, and a 0:08–0:10 close-up of the key feature. State that the product color, label placement, and background must remain unchanged. If a product image supplies the composition, use adaptive ratio and the applicable reference mode.
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Landscape travel establishing shot
Choose 16:9 for a conventional horizontal player or 21:9 when the location itself benefits from an exceptionally broad view. Give the first beat to the landscape, the second to a subject entering or moving through it, and the final beat to a stable view that can accept a title in post-production. Do not place essential signage at the extreme edges.
Square social preview
Choose 1:1 when the same asset must occupy equal-width and equal-height space. Frame the subject near the center and avoid a long left-to-right action that would feel cramped. A three-beat storyboard can show the setup, the central action, and a final product or character pose without relying on a crop from 16:9.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Troubleshooting common planning failures
The subject is cropped
Confirm the requested ratio and inspect the prompt for conflicting directions such as a full-body portrait in a narrow landscape frame. Move the subject inward, simplify the camera move, or regenerate with the intended orientation from the start. Cropping a completed clip into another ratio can remove action that was never inside the original frame.
The shots run together
Reduce the number of beats, give every beat a distinct timestamp, and state a clear start and end action. The 4–6-second storyboard guidance is a useful pacing reference, not a timing guarantee. If the sequence still merges, generate shorter clips and edit them together.
Resolution or dimensions are rejected
Read the selected host’s current parameter schema. A named tier may map to different pixels than another provider’s tier, and explicit width and height may take precedence where supported. Remove unsupported combinations such as an unlisted ratio or a 21:9 size copied from a different API.
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Character or object continuity drifts
Use a deliberate reference workflow, label assets consistently, and repeat only the identity details that matter: clothing color, hairstyle, object shape, and position. Check whether the chosen reference mode is incompatible with first- or last-frame control before submitting.
Audio does not match the action
Shorten dialogue, assign it to a specific beat, and state who speaks. If exact timing is more important than native sound generation, disable audio where the API allows it and add the track in an editor.
The request fails before generation
Check region alignment among the model, endpoint, and API key, then validate reference counts, combined reference duration, public-link requirements, and mutually exclusive input modes. A failure at submission usually indicates a parameter or compatibility problem rather than a prompt-writing problem.
Final pre-generation checklist
- The destination and frame shape are explicit.
- The ratio is fixed or adaptive for a stated reason.
- The selected resolution tier is available in the chosen implementation.
- The duration is between 2 and 30 seconds, or smart duration is intentionally selected where supported.
- Each storyboard beat has a timestamp, framing, action, and camera direction.
- Subjects and reference assets have stable names and clear roles.
- Audio instructions are included only when needed.
- Exclusions cover the most damaging unwanted elements.
- Reference counts, combined durations, and incompatible modes have been checked.
- Model, endpoint, API key, and region agree.
Making the choice
For text-only experimentation, start with the destination’s native orientation, a modest fixed duration, and a small number of 4–6-second beats. For image-led or editing work, let adaptive ratio preserve the source composition and verify the host’s reference rules before uploading assets. Treat resolution names and pixel dimensions as implementation details to confirm, not assumptions to carry from one service to another. This approach gives Wan 3.0 the information it can use—shape, timing, subject, camera, and sound—while leaving unsupported guarantees out of the prompt.
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