JNG
From Just Solve the File Format Problem
JNG (JPEG Network Graphics) is an image file format. It encapsulates a JPEG datastream, and adds support for transparency.
It is essentially the lossy-compression counterpart to PNG. It was developed so that MNG could use it as a building block.
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Identification
Files begin with 8B 'J' 'N' 'G' 0D 0A 1A 0A
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