Read: | Online documentation | Developer wiki
Download: | releases
Interact: | #x265 on freenode.irc.net | [email protected] | Report an issue
x265 is an open source HEVC encoder. See the developer wiki for instructions for downloading and building the source.
x265 is free to use under the GNU GPL and is also available under a commercial license
Here the x265 code was modified to support a lowpass subband approximation for the DCT. During performance tests this approximation had a gain of around 10% in performance. Thus allowing encoding time to be reduced at the same rate.
It also produced very small loss for 23 <= Qp =< 25 and minimal loss for Qp > 25, compared to the standard DCT.
´´´ ./x265 input_file -o output_file --qp 25 --lowpass-dct ´´´