HEVC stands for High Efficiency Video Coding (also known as H.265). x265 is the open-source encoder application used to write this format. HEVC is the successor to the older AVC/H.264 standard. Its primary benefit is that it offers than H.264 at the exact same level of video quality. This means you get a visually perfect movie at a fraction of the traditional file size, making it easier to store and stream. 3. 10-bit Depth