Libpng warning: ignoring bad adaptive filter type

Question

my application was killed and the warning is log: libpng: Ignoring a bad adaptive filter type. I want to know the reason and solution.

+3

wangsisi Apr 13 '12 at 1:29

2 answers

Glenn randers-pehrson · Answer 1 · 2015-07-08T22:12:42+0000

The question does not provide enough information to provide a complete answer.

The message "bad adaptive filter" means that the PNG file is either damaged or has been generated by a code encoder.

Each line of a PNG file scan starts with a filter type byte, which should be 0, 1, 2, 3, or 4.

Kevin Chen · Answer 2 · 2019-04-13T10:00:01+0000

, , ( Python):

try:
    Image.open(path).tobytes()
except IOError:
    print('detect error img %s' % path)
    continue