Print Page - How can I use "Format File" to extract the first [MakerNotes] F Number

Title: How can I use "Format File" to extract the first [MakerNotes] F Number
Post by: Andy Quinlan on January 15, 2012, 11:16:09 AM

Canon digital image from Canon DIGITAL IXUS 100 IS

Extracted with

a) [ExifTool -a -m -u -G ] with ExifTool Ver: 8.72 gives three values for "F Number"

[EXIF] F Number : 9.0
[MakerNotes] F Number : 8.9
[MakerNotes] F Number : 9

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b) Extracted with (Hex numbers)

ExifTool -a -H Fnumber abc.jpg

0x829d F Number : 9.0
0x0015 F Number : 8.9
0x0006 F Number : 9

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c) using Format File

$Canon:FNumber

Always Gives output value for [MakerNotes] F Number i.e. 9

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Question: How can I use "Format File" to extract the first [MakerNotes] F Number value of : 8.9 ?

Andy

Title: Re: How can I use "Format File" to extract the first [MakerNotes] F Number
Post by: Phil Harvey on January 15, 2012, 11:40:02 AM

Hi Andy,

For tags like this, you must go to the family 4 groups to differentiate them:

Code Select

> exiftool -fnumber -G4 -a image.jpg
[]              F Number                        : 9.0
[Copy1]         F Number                        : 8.9
[Copy2]         F Number                        : 9

So to extract only the 2nd one:

exiftool -copy1:fnumber image.jpg

or "$copy1:fnumber" in a format file.

- Phil

Title: Re: How can I use "Format File" to extract the first [MakerNotes] F Number
Post by: Andy Quinlan on January 16, 2012, 07:55:41 PM

Hi Phil,

Many thanks for your help.

Andy

ExifTool Forum

ExifTool => The "exiftool" Application => Topic started by: Andy Quinlan on January 15, 2012, 11:16:09 AM