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Imported Video Looks Stretched: Check Pixel Ratio

Anonymous community contributor (alias): Rainy Lane Drawing Pin Published: Category:Guides

Find the first stage where the circle changes shape

After obtaining video footage from Flux Art, if a previously normal circular package or logo becomes oval in your editor, compare the original file, source monitor, timeline and actual export before generating it again. The same pixel dimensions can be interpreted with different pixel aspect ratios, and the timeline may also apply uneven scaling. This is an external post-production check, not a claim that footage-interpretation menus are platform features. Compare the same frame and version throughout to identify the layer where the change occurs.

Keep the file information and a reliable shape reference

Duplicate the project for diagnosis and preserve the downloaded original. Record the encoded dimensions, display aspect ratio, pixel aspect ratio reported by the software and source specifications. A circular reference should come from an approved design or a front-facing flat graphic: a disc photographed in perspective may already look oval, so it cannot establish the correct footage settings. Automatic fitting in a player can also affect what you see. Record the window size, zoom and captured frame. If the source file itself is already flattened, import settings cannot restore geometric information that is absent; investigate upstream.

Pixel aspect ratio is not the aspect ratio of the whole frame

Pixel aspect ratio describes the displayed width and height of one pixel; frame aspect ratio describes the entire display area. In simplified terms, display aspect ratio depends on both the encoded width-to-height ratio and pixel aspect ratio. Do not assume pixels are square merely from one set of dimensions. The sequence canvas, footage interpretation and horizontal and vertical scaling on a clip are separate settings. Record them separately before deciding what to change. The table is a diagnostic record framework, not measurements showing that any particular asset has passed.

Observation pointFields to recordAction
Source fileEncoded dimensions and source specificationsEstablish the original geometry first
Footage interpretationFile ratio or manually assigned valueCorrect only with supporting evidence
Timeline instanceHorizontal and vertical scaling and transform effectsChange only the affected instance
Nested sequenceInner and outer canvases and scalingCheck cumulative effects
Delivery canvasApproved padding or croppingAvoid nonuniform stretching
Actual exportTarget playback environment and shapesLeave untested conditions unknown

Start with footage interpretation, without guessing a value

In Premiere, select the footage in the Project panel and use Modify, then Interpret Footage, to inspect how its pixel aspect ratio is handled. Adobe distinguishes between using the pixel aspect ratio in the file and specifying another ratio. Correct the interpretation only when source specifications or reliable media information support the change. Trying values until a circle looks pleasing does not establish the correct value. A change in interpretation may affect other uses of the same footage, so inspect those references and save a project copy first. If information is missing, mark it unknown and request evidence from the supplier.

If only one clip is distorted, inspect its instance transforms

If the source monitor looks correct but one timeline instance is distorted, check whether horizontal and vertical scaling have been separated, and whether transform effects, a nested sequence or a parent-level size adjustment are also applied. Record each original value and restore one variable at a time. Cropping generally changes the visible area, while nonuniform scaling changes geometry; do not describe both simply as an incorrect ratio. Do not reset every clip to identical scaling either. Different compositions may have approved positioning and cropping, which a bulk reset could destroy.

Hypothetical example: identical dimensions can display differently

Suppose two test clips have exactly the same encoded dimensions, but one is assigned nonsquare pixels while the other uses square pixels. Their displayed widths may differ. This is not an actual test or a real customer file; it only explains why encoded dimensions alone are insufficient. Use authorized, self-created front-facing circles and grids to record the effects of different settings in a diagnostic project. Do not stretch or squeeze a real product to conceal an original proportion error. A correction needs supporting source information.

When the canvas differs, agree on padding or cropping

When the footage geometry is correct but the delivery canvas has another aspect ratio, ask the responsible person to approve proportional scaling with padding, proportional cropping or a new composition. Padding does not create missing content; cropping may remove packaging text; stretching changes the product's shape. These are not interchangeable shortcuts. Where the full product outline must remain visible, select an approved treatment and inspect whether the subject reaches the crop boundary throughout the clip. Return to visual creation only if a background extension or a new visual is genuinely needed, rather than labeling every technical adaptation issue a model failure.

Check geometry and content in the actual exported video

Export a sample containing the reference shape and its movement, then open it in the player or playback container intended for delivery. Check circles, text, edges, padding and cropping. A correct project preview does not prove the exported file is interpreted correctly, and one screenshot cannot cover cropping changes during movement. Link the acceptance record to the file hash, export preset, software version and observed frames. If the target device has not been tested, explicitly mark evidence as pending. Retain the original footage and approved project so the stretched copy does not become the only surviving version.

References and the boundary with visual creation

Adobe's guidance on footage aspect ratio interpretation was checked on November 6, 2026: https://helpx.adobe.com/premiere/desktop/edit-projects/intro-to-editing/correct-aspect-ratio-misinterpretations.html . For duration changes, see Related workflow . Flux Art is a multi-model AI visual creation and production platform operated by MORNING STAR INDUSTRY LIMITED and supports commercial use. Start visual production at https://flux-art.net/en/ai-video . Verify input rights and product accuracy separately. No customer-file testing was performed for this article.

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Frequently Asked Questions

Q: Does an oval circle mean the model drew it incorrectly?

A: Not necessarily. Compare the original, source monitor, timeline and final video to find the first point where the shape changes.

Q: Do identical resolutions prove identical proportions?

A: No. Check pixel aspect ratio and instance transforms as well as encoded width and height.

Q: Can I change every asset to square pixels?

A: Do not do this by default. Confirm the source specifications and actual media information rather than standardizing interpretation for convenience.

Q: Can a disc seen in perspective serve as a shape reference?

A: It is unsuitable. Perspective itself changes how a circle looks; use an established front-facing geometric reference.

Q: What should I check if only one clip is distorted?

A: Start with that instance's nonuniform scaling, transform effects and nesting, rather than immediately changing the entire source asset.

Q: How does cropping differ from stretching?

A: Cropping reduces the visible area; stretching can alter an object's shape. Obtain separate design approval for these delivery decisions.

Q: Will changing pixel aspect ratio fix the video's duration?

A: This article addresses spatial geometry, not frame rate or duration. Diagnose timing issues through a separate workflow.

Q: Can I call the work complete before testing the target device?

A: Record only the environments actually checked. Do not extend that result to an overall pass; keep untested devices marked as awaiting evidence.