PtbPublic/exifdate
PtbPublic/exifdate
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Add date fix from file creation date to EXIF data #1

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opened 2023-07-01 16:48:07 +03:00 by alex · 1 comment
alex commented 2023-07-01 16:48:07 +03:00
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Add a new option:

  • fix EXIF creation date from file creation date
  • ignore this in case EXIF creation date is exists
Add a new option: - fix EXIF creation date from file creation date - ignore this in case EXIF creation date is exists
alex added this to the v.: 0.0.2 milestone 2023-07-01 16:48:07 +03:00
alex added the
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 labels 2023-07-01 16:48:07 +03:00
alex self-assigned this 2023-07-01 17:00:51 +03:00
alex added spent time 3 hours 2023-07-01 20:29:14 +03:00
alex commented 2023-07-01 20:35:02 +03:00
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There are few things ate my time:

  • jpeg file format variations
  • jfif vs exif

So, in order to make any changes to EXIF data (APP1 segment) the following solution is applicable:

  • read out the whole file (just map it)
  • find out required section for EXIF
  • do the changes
  • write out all the data back, segment by segment

nor libexif nor libjpeg doesn't provide such thing. also misc information and image data itself are not page size aligned.

There are few things ate my time: - jpeg file format variations - jfif vs exif So, in order to make any changes to EXIF data (APP1 segment) the following solution is applicable: - read out the whole file (just map it) - find out required section for EXIF - do the changes - write out all the data back, segment by segment nor libexif nor libjpeg doesn't provide such thing. also misc information and image data itself are not page size aligned.
alex added a new dependency 2023-07-01 21:39:49 +03:00
#5 Create jpeg_data structure
alex added a new dependency 2023-07-01 21:40:04 +03:00
#6 Parse functions for jpeg file structure
alex added a new dependency 2023-07-01 21:40:16 +03:00
#7 EXIF data manipulation functions on jpeg_data_t
alex added a new dependency 2023-07-01 21:40:23 +03:00
#8 Write to file jpeg_data_t function
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#5 Create jpeg_data structure
PtbPublic/exifdate
#6 Parse functions for jpeg file structure
PtbPublic/exifdate
#7 EXIF data manipulation functions on jpeg_data_t
PtbPublic/exifdate
#8 Write to file jpeg_data_t function
PtbPublic/exifdate
Reference: PtbPublic/exifdate#1
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