libheif
https://github.com/strukturag/libheif
C++
libheif is a ISO/IEC 23008-12:2017 HEIF file format decoder and encoder.
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- Issues
- Allow separate quality settings for the alpha channel image
- rav1e: do not pad to 16x16 minimum image size anymore
- [Question] Common metadata container formats?
- HDR to 8-bit not always outputting 8-bit?
- Support color-conversions with different bpp in alpha plane
- Could not decode image: 0: Unsupported feature: Unsupported color conversion
- crash
- read all auxiliary images feature is unclear
- Premultiplied vs non-premultiplied alpha in HEIF
- Heif decoding processing speed is degraded in V1.7.0 or later version.
- Docs
- C++ not yet supported