An Efficient and Open Source Encoder Uavs3e for Video Compression

The software x264 is an open source encoder for video compression which was released in 2003 and has been dominating the industry for the past decade. Over the last few years, an open source encoder x265 for High Efficiency Video Coding (HEVC) video coding standard was released, and it claims significant improvement over the x264. Similar to x265, an efficient video encoder namely uavs3e was designed by our team and other corporate contributors in 2020. The uavs3e software library and application are available in GitHub [1]. The main goal of uavs3e development is to achieve substantial compression gain over state-of-the-art open source codecs while minimizing the computational complexity. For higher compression capabilities, uavs3e adopts massive new coding tools, which can increase the performance of pre-diction, transform, etc. Compared with the reference soft-ware HPM4.0, the speed level 1 of uavs3e could speed up 86.1x, while the compression performance loss is not more than 2.3%. Compared with x265 veryslow preset, the uavs3e project achieves an average of 22.7%, 46.1%, and 46.2% BD bitrate saving in luminance and chrominance components respectively.