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Thanks for the hint!xnview wrote:The error is 'IDAT: invalid distance too far back', from Libpng they recommand to use "contrib/tools/pngfix", "pngcrush" to fix such bad file.
Code: Select all
pngcrush.exe X:\in\SoftJig.png X:\out\SoftJig.png
Recompressing IDAT chunks in X:\in\SoftJig.png to X:\out\SoftJig.png
Total length of data found in critical chunks = 13573
While converting X:\in\SoftJig.png to X:\out\SoftJig.png:
pngcrush caught libpng error:
IDAT: invalid distance too far back
Critical chunk length, method 12 (ws 15 fm 0 zl 0 zs 0) = 99Code: Select all
pngcrush.exe -fix X:\in\SoftJig.png X:\out\SoftJig.png
Recompressing IDAT chunks in X:\in\SoftJig.png to X:\out\SoftJig.png
Total length of data found in critical chunks = 13573
Critical chunk length, method 1 (ws 15 fm 0 zl 4 zs 0) = 17795
Critical chunk length, method 2 (ws 15 fm 1 zl 4 zs 0) > 17795
Critical chunk length, method 3 (ws 15 fm 5 zl 4 zs 1) > 17795
Critical chunk length, method 4 (ws 15 fm 0 zl 9 zs 1) = 13445
Critical chunk length, method 7 (ws 15 fm 0 zl 9 zs 0) > 13445
Best pngcrush method = 4 (ws 15 fm 0 zl 9 zs 1) = 13445
(0.94% critical chunk reduction)
(0.94% filesize reduction)Thank you for checking, Pierre. Perhaps XnView can display a more detailed error message which points to the problem.xnview wrote:The error is 'IDAT: invalid distance too far back', from Libpng they recommand to use "contrib/tools/pngfix", "pngcrush" to fix such bad file.