Retrieving Exif IFD0:Date/Time in (possibly) the wrong format.

[mbmast]

Possible issue, not really certain.

Using metadata-extractor-2.19.0.jar against the attached file, I get the following metadata tag Exif IFD0:Date/Time value: Sat Feb 04 18:44:14 2006. Isn't this formatted incorrectly for this tag? Shouldn't it be formatted like this: YYYY:MM:DD HH:MM:SS?

[drewnoakes]

Can you share your code? It's possible that the date is being parsed and reformatted on your machine to a local culture's date format.

[DAN-MU-ZI]

@mbmast @drewnoakes This issue arises because the DateTime field in the Exif metadata is stored in RFC 2822 format as ASCII values, rather than following the Exif DateTime format ("YYYY:MM:DD HH:MM:SS"). The current implementation does not handle this discrepancy and simply outputs the stored value. To address this, it seems necessary to implement additional processing, such as delegating the responsibility of handling this field to ExifIFD0Descriptor, to ensure proper formatting or error handling in compliance with Exif standards.

For reference, the Exif standard specifies the required DateTime format on page 44 of the official document: Exif Standard (CIPA DC-008-2012).

[drewnoakes]

Sat Feb 04 18:44:14 2006 is the value stored in the image. As @DAN-MU-ZI says, this is not the expected format. You can try and parse it yourself if you like.

The library does go to some effort to try and parse the date when it can, but it doesn't support this format. See:

metadata-extractor/Source/com/drew/metadata/Directory.java

Lines 879 to 894 in 0c3452b

	if ((o instanceof String) || (o instanceof StringValue)) {
	// This seems to cover all known Exif and Xmp date strings
	// Note that " : : : : " is a valid date string according to the Exif spec (which means 'unknown date'): http://www.awaresystems.be/imaging/tiff/tifftags/privateifd/exif/datetimeoriginal.html
	String datePatterns[] = {
	"yyyy:MM:dd HH:mm:ss",
	"yyyy:MM:dd HH:mm",
	"yyyy-MM-dd HH:mm:ss",
	"yyyy-MM-dd HH:mm",
	"yyyy.MM.dd HH:mm:ss",
	"yyyy.MM.dd HH:mm",
	"yyyy-MM-dd'T'HH:mm:ss",
	"yyyy-MM-dd'T'HH:mm",
	"yyyy-MM-dd",
	"yyyy-MM",
	"yyyyMMdd", // as used in IPTC data
	"yyyy" };

Sharing your code would be helpful.

[mbmast]

I’ll post some code after the Thanksgiving holiday. On Nov 26, 2024, at 03:18, Drew Noakes ***@***.***> wrote: image.png (view on web) Sat Feb 04 18:44:14 2006 is the value stored in the image. As @DAN-MU-ZI says, this is not the expected format. You can try and parse it yourself if you like. The library does go to some effort to try and parse the date when it can, but it doesn't support this format. See: https://github.com/drewnoakes/metadata-extractor/blob/0c3452bf1c4556724930281ffd97f65b66bfd697/Source/com/drew/metadata/Directory.java#L879-L894 Sharing your code would be helpful. —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you were mentioned.Message ID: ***@***.***>