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Add date fix from file creation date to EXIF data #1

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opened 2 years ago by alex · 1 comments
alex commented 2 years ago
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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 2 years ago
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alex self-assigned this 2 years ago
alex added spent time 2 years ago
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alex commented 2 years ago
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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 2 years ago
#5 Create jpeg_data structure
alex added a new dependency 2 years ago
#6 Parse functions for jpeg file structure
alex added a new dependency 2 years ago
#8 Write to file jpeg_data_t function
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Depends on
#8 Write to file jpeg_data_t function
PtbPublic/exifdate
#7 EXIF data manipulation functions on jpeg_data_t
PtbPublic/exifdate
#6 Parse functions for jpeg file structure
PtbPublic/exifdate
#5 Create jpeg_data structure
PtbPublic/exifdate
Reference: PtbPublic/exifdate#1
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