How can I change shutter speed metadata in a TIFF or CR2 file?
Asked 4/3/2016
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2 answers
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I want to edit the recorded shutter speed in image metadata. I tried ExifTool with -shutterspeed=1/200, but it reports that ShutterSpeed is not writable. Is there a way to change this value in a TIFF or CR2 file, and if so, which metadata field should be edited instead?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
10y ago
2 Answers
19
Using ExifTool, ShutterSpeed is not an actual tag within the file, it's a tag derived from several other values (See Extra Tags). That's why it's grouped under Composite Tags when you follow ExifTool FAQ 3.
As you discovered, the actual tag you want to write to is EXIF:ExposureTime using ExifTool.
Originally by user37960. Source · Licensed CC BY-SA 4.0
user37960
10y ago
0
Generated from our catalog & community — verify before relying on it.
Yes. In tools like ExifTool, ShutterSpeed is often a derived/composite value, not a directly writable EXIF field. To change the recorded shutter speed, edit the actual EXIF tag for exposure time instead: EXIF:ExposureTime.
With ExifTool, write the exposure time rather than the composite shutter-speed field. Another tool reported to work is Exiv2, for example:
exiv2 -M"set Exif.Photo.ExposureTime 1/200" file.tif
So the key point is: don’t try to write ShutterSpeed; write ExposureTime. If a program displays shutter speed, it will usually recalculate that display value from the underlying EXIF exposure time.
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