I like HEIF(HEIC) images because they are very lightweight and efficiently compressed.
However sometimes thier rotation is not recognized.
For example,
- photos taken by iPhone : OK
- Rotation info is included in both EXIF and IROT boxes (which are defined HEIF container format).
- photos generated by Android Phones : NG
- Rotation info is included only in IROT boxes.
It seems that iOS checks only rotation info in EXIF, not in IROT boxes.
Is it a bug of iOS framework? or are there any workarounds to avoid this phenomenon?
