x265 is a H.265 / HEVC video encoder application library, designed to encode video or images into an H.265 / HEVC encoded bitstream. x265 Project Goals x265 demonstrates best overall HEVC encoding efficiency in Moscow State University’s Codec Comparison Develop the best HEVC (H.265) video encoder in the world – Offer the highest possible quality at any given bit rate – Offer the lowest possible bi