libheif: libheif (HEIF and AVIF file format decoder and encoder) libheif: libheif: libheif is an ISO/IEC 23008-12:2017 HEIF and AVIF (AV1 Image File libheif: Format) file format decoder and encoder. HEIF and AVIF are new image libheif: file formats employing HEVC (h.265) or AV1 image coding, respectively, libheif: for the best compression ratios currently possible. HEIF is the libheif: default image file format on Apple devices. libheif makes use of libheif: libde265 for HEIF image decoding and x265 for encoding. For AVIF, libheif: aom is used as codec. libheif: libheif: homepage: https://github.com/strukturag/libheif