![]() ![]() If you look at page 32, you can see that ff e0 to ff ef are used for application segments. The JPEG specification can be found here. I could find further examples on the Internet:Į4 (maybe a corruption, so no 100 % evidence, see espressif/esp32-camera#4 )Į8 SPIFF (Still Picture Interchange File Format) I would consider all headers from ff d8 ff e0 to ff d8 ff ef as valid JPEG files. ![]() JPEG image data, JFIF standard 1.01, resolution (DPI), density 180x180, segment length 16, Exif Standard:, baseline, precision 8, 2597x1948, components 3 JPEG image data, Exif standard:, baseline, precision 8, 4000x3000, components 3 This gives an ongoing list of file-type magic numbers. There is an ascii encoding of "JFIF" which comes after a length code, but that is not necessary in order to identify the file. JFIF.Gįfd8 shows that it's a JPEG file, and ffe0 identify a JFIF type structure. ![]() This makes programming easier because complicated file structures need not be searched in order to identify the file type.įor example, a jpeg file starts with ffd8 ffe0 0010 4a46 4946 0001 0101 0047. Magic numbers are the first bits of a file which uniquely identify the type of file. ![]()
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