Getting image and video orientation correct, which should be trivial, is decidedly not. In writing PhotoStructure [1], I discovered
1) Firefox respects the Orientation tag using a standard [2] CSS tag, but Chrome doesn't [3]
2) That videos sometimes use "Rotation", not "Orientation" (and Rotation is encoded in degrees, not the crazy EXIF rotation enum). Oh, and some manufacturers use "CameraOrientation" instead, just for the LOLs [4]
3) That the embedded images in JPEGs, RAW, and videos sometimes are rotated correctly, and sometimes they are not, depending on the Make and Model of the camera that produced the file. If Orientation or Rotation say anything other than "not rotated," you can't trust what's in that bag of bits.
[1] https://blog.photostructure.com/introducing-photostructure/
[2] https://www.w3.org/TR/css-images-4/#image-notation
[3] https://bugs.chromium.org/p/chromium/issues/detail?id=158753
[4] https://exiftool-vendored.js.org/interfaces/makernotestags.h... (caution, large page!)
1) Firefox respects the Orientation tag using a standard [2] CSS tag, but Chrome doesn't [3]
2) That videos sometimes use "Rotation", not "Orientation" (and Rotation is encoded in degrees, not the crazy EXIF rotation enum). Oh, and some manufacturers use "CameraOrientation" instead, just for the LOLs [4]
3) That the embedded images in JPEGs, RAW, and videos sometimes are rotated correctly, and sometimes they are not, depending on the Make and Model of the camera that produced the file. If Orientation or Rotation say anything other than "not rotated," you can't trust what's in that bag of bits.
[1] https://blog.photostructure.com/introducing-photostructure/
[2] https://www.w3.org/TR/css-images-4/#image-notation
[3] https://bugs.chromium.org/p/chromium/issues/detail?id=158753
[4] https://exiftool-vendored.js.org/interfaces/makernotestags.h... (caution, large page!)