Jpeg: Why Do I Find Alot Of Soi-Markers But No Jfif Tag

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JPEG

Hi all:-)

I am inspecting a binary file. I know, that there inside are many jpeg-files. I want to find the bytes of these jpeg-files.

When i look at the raw bytes of the binary file, i find many
SOI-marker (FF D8 in Hex) which do not have a following JFIF-tag (FF E0 00 10 4A 46 49 46 00 01 in Hex). (But others have a following JFIF tag).

Also i see the following: There are many SOI-marker before a EOI-marker appears. (eg.: SOI... SOI ... EOI...EOI)

I think that these are thumbnails of the jpeg, which are in the jpeg itself.

Can anyone tell me, what these FF D8 without a following JFIF-tag mean?

Any try to help is welcome:-)