Wireshark mailing list archives

Re: filter for jpeg can not use


From: damker <damker () sina com>
Date: Mon, 15 Jun 2020 13:30:25 +0800

the unit of measurement for this filter is confused.
such as "jpeg.main_hdr.width == 80", it means "the original value is 80 (means 640 pixels) " or "the transform value 
(pixels) is 80 " ?
if it means the original value, the max value should be 255.
if it means the transform value, the max value should not be 255 

i had did some test,when i use "jpeg.main_hdr.width == 80", it display blank, 
when i use "jpeg.main_hdr.width > 255", the message with 640 pixels(the original value is 80 ) displayed,
it mean that the filter is "the transform value".








damker

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