PNG white background test files

• Transparent original PNG
• Original PNG with opaque white pixels
• Parameter sheet (CSV)
• Reproduction script (CJS)
• Download all files (ZIP)

Unzip and run node reproduce.cjs with FFmpeg on PATH. Tested with Node 24.22.1 and FFmpeg N-126374-g089a48eb36-20260831. The pixel coordinates are zero-based, measured from the top left.

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