source_file: "IPHON8PLUShSLI0020NRD-IMG_0218.dng"
want_err: true
want_fingerprint: {
  want_kind: "CRC32"
  want_hash: "04faf813"
  want_quality: 50
}
want_fingerprint: {
  want_kind: "MD5"
  want_hash: "886f3e000c3ecb59de2e494416c5b51e"
  want_quality: 80
}
want_fingerprint: {
  want_kind: "SHA1"
  want_hash: "a247716c5344178a55af6f471da9b0bde9cc4255"
  want_quality: 99
}
want_fingerprint: {
  want_kind: "filesize"
  want_hash: "12560364"
  want_quality: 20
}
exif: {
  want_camera_model: "Apple iPhone 8 Plus"
  want_photo_id: "2017-10-10 12:07:28.526 +0000 UTC"
}
xmp: {
  comment: "No XMP data"
}
img_phash: {
  comment: "TODO: implement decoding dng"
  skip: true
}
video_phash: {
  comment: "No Video Data"
  skip: true
}