Developer ships bug that shrank 1080p video to 480p in the name of quality

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A developer building a client-side video compression tool discovered a critical bug that caused a 1080p, 30fps clip to be downscaled to 480×270 resolution — ostensibly to preserve quality. The flaw stemmed from using a bits-per-pixel threshold designed for first-generation camera footage, which does not account for videos already compressed by messaging apps or prior exports. The tool's resolution-ladder logic read a re-encoded clip's naturally low bitrate as quality damage, then compounded the error by running the ladder against an already-reduced bitrate budget. In one case, a 77.5 MB source was downscaled from 1858×1660 to 806×720 just to achieve a pixel density higher than the original already had. The developer, who built the tool solo over roughly two weeks, publicly documented all six bugs shipped during that period.

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