Re: EXIF support in PNG
John Bowler <[email protected]>
| Newsgroups | gmane.comp.graphics.png.general |
|---|---|
| Message-ID | <CAP7U39_W9t=DADGpsF+Gouna8jFCrH5W7R+-Taz66-2TEvyP-A@mail.gmail.com> |
On Thu, Jan 5, 2017 at 2:05 PM, Willem van Schaik <[email protected]> wrote: > > oops, copied from the wrong line, should be 000072b0 > > the SOI is two bytes, so then the last bytes become "d4 cb 71 a3" Hum; I expect to see 0xff after the end, that 0xff should be at 0x0004+0x0x72B5 = 0x72B9, that's not the first 0xff: > 000072b0 37 71 f9 d4 cb 71 a3 ff d9 [ff db] 00 84 00 02 01 FFD9 is EOI, end of image, and is the last thing in the JPEG FFDB is DQT and happens in the middle of the JPEG A valid image needs an SOFn marker, 0xFFCn and ends with FFD9 (EOI) It may be that the FFD9 is specified by EXIF, or it may just be a coincidence. John Bowler ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, SlashDot.org! http://sdm.link/slashdot