Identical Tag Names

[greybeard]

I had originally posted this because I was seeing duplicate tag names - only one of which was being displayed by exiftool using commands such as:

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exiftool -a -G1 <filename>
after more research i see the following code:

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    0x100b => { #2
        Name => 'NoiseReduction',
        Flags => 'PrintHex',
        Writable => 'int16u',
        RawConv => '$val == 0x100 ? undef : $val',
        PrintConv => {
            0x40 => 'Low',
            0x80 => 'Normal',
            0x100 => 'n/a', #PH (NC) (all X100 samples)
        },
    },
I'm assuming that this means that even though the tag exists it won't display if the value is 0x100.

I hadn't been aware that exiftool sometime skips tags and doesn't display them