Wireshark · Wireshark-users: Re: [Wireshark-users] filter for jpeg can not use

[chuck c <bubbasnmp@xxxxxxxxx>]

Looks like time to move this to Bugzilla - https://bugs.wireshark.org/bugzilla/

If you could include a brief description there and include a link back to the screen shots here (https://www.wireshark.org/lists/wireshark-users/202006/msg00004.html)

 206                 offset += 1;
 207                 w = tvb_get_guint8(tvb, offset) * 8;
 208                 proto_tree_add_uint(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_width, tvb, offset, 1, w);
 209                 offset += 1;
 210                 h = tvb_get_guint8(tvb, offset) * 8;
 211                 proto_tree_add_uint(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_height, tvb, offset, 1, h);
 212                 offset += 1;

On Mon, Jun 15, 2020 at 12:31 AM damker <damker@xxxxxxxx> wrote:

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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