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1. Default watermark (black picture) will be used if PNG watermark file is damaged or is not a PNGabsent
Symptoms: black picture in output stream when watermark is added, there is a message in server log
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1. Default watermark (black picture) will be used if PNG watermark file is damaged or is not a PNGabsent
Symptoms: black picture in output stream when watermark is added, there is a message in server log
...