x265 is a free software library and application used to encode video streams into the compression format. It is widely used because it can deliver the same visual quality as its predecessor (x264) at roughly half the bitrate . Core CLI Usage
: x265 --preset slow --crf 22 input.y4m -o output.hevc x265-man
: You can choose from ten predefined presets (from ultrafast to veryslow ) that trade encoding speed for compression efficiency. The default is medium . Rate Control : x265 is a free software library and application
: For archiving where no data loss is acceptable, you can use the --lossless option. The default is medium
: The default and recommended method for high-quality encoding. Values usually range from 0–51, where lower values mean higher quality.
For a complete technical deep-dive into every available flag, you can view the official x265 documentation or run x265 --help in your terminal. x265 - EasyBuild - building software with ease
The basic command-line structure for using the x265 encoder is: x265 [options] infile [-o] outfile