Use media-libs/libaom for AVIF encoding/decoding Enable support for the dav1d codec decoding using media-libs/dav1d Enable H.265 support using media-libs/libde265 Enable x11-libs/gdk-pixbuf plugin Build heif-view (requires USE=tools) Enable H.265/HEVC encoding support via media-libs/kvazaar Enable H.264 support using media-libs/openh264 Use media-video/rav1e for AVIF encoding Use media-libs/svt-av1 for SVT-AV1 encoding Allow tests that rely on options not normally enabled Build command line tools Enable high-quality YCbCr/RGB color space conversion algorithms Use media-libs/x265 for HEIF encoding https://github.com/strukturag/libheif/issues strukturag/libheif