XnView and FFmpeg fail for the attached BMP. The source is the FFmpeg RGBTESTSRC filter, 320 x 240 pixels, 766 colours. In the BMP all 8 bits source colours are represented by 10 bits (padding 00 or 11 determined by the most significant bit). The two alpha bits are 11 (= no transparency). The format has the name
A2R10G10B10, it is not some intentionally weird mix of bit fields. Unsurprisingly all Microsoft tools on Windows 7 can display it (mspaint.exe, explorer thumbnail, photo gallery, photo viewer), and Chrome can also handle it.
Please allow more formats supported by XnView in forum uploads, I think a wannabe BMP can't be more dangerous than a wannabe PNG.
There is a nice BMP
test suite, and the last example
rgb32bf.bmp in its
g-subdirectory also fails with XnView. The
g (good) stuff is supposed to work everywhere, the
b (bad) files shouldn't cause unscheduled crashes instead of a decent error message, and for the
q (questionable) images the author isn't sure if that's good, bad, or ugly.
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