Ability to write exif data

[tvolkert]

It'd be great to use this library to write exif data to a file.

[TiffApps]

Also to add some data to an existing EXIF, for example the date.

[TheLastGimbus]

Hi there! @bigflood is there any chance this can get implemented? Is it particulary hard or something?

If it maybe something kind of "do the same as for reading, but reversed", i would be happy to help

[bigflood]

@TheLastGimbus It's not that simple :(

[tvolkert]

If I had the time to look into this myself (unfortunately I don't), I'd start by looking at https://github.com/exiftool/exiftool and trying to port some of it to Dart 🙂

[tvolkert]

Then again, https://github.com/exiftool/exiftool/blob/master/lib/Image/ExifTool.pm is 10,000 lines of Perl code, so good luck with that 😆

[Shawn-sudo]

What about using dart:ffi to use an existing C++ exif tool?

• https://dart.dev/interop/c-interop
• https://exiftool.org/cpp_exiftool/

[TheLastGimbus]

With this, it would prooobably be easier to just use Process.run('exiftool ...') altoghether...

[tvolkert]

I started playing around with ffi bindings for libexif, with some luck -- https://github.com/tvolkert/dart_ffi_bindings/blob/main/packages/libexif/lib/libexif.dart

But I ended up finding what I needed in package:image, so I never finished the work.