Pixel aspect ratio describes the intended width-to-height shape of one stored image sample. Square pixels have a ratio of one to one. Non-square samples require appropriate display scaling, which is why a source’s stored dimensions do not always describe its final on-screen proportions.
Do not confuse three ratios
The frame’s stored dimensions, the shape assigned to each pixel and the intended displayed picture are related but different. A player combines them to decide how wide the image should appear. Looking at only the stored width can make a valid legacy television format seem incorrectly squeezed.
Use a geometry reference
A circular logo or known object is a useful visual clue. Compare the same source in two supported players with automatic aspect handling enabled. If one result is clearly distorted, note whether a manual aspect override was active before concluding that the media itself has been encoded incorrectly.
Keep fixes local and reversible
Use a player-level correction for a single troublesome source if that option is available. Changing the television’s global shape setting can distort unrelated programmes and menus. Record the original value and return to it after the test. For support, provide both the media dimensions and the visible distortion rather than a guessed diagnosis alone.
