## Presets

A system designed to reduce the work needed to generate sane, efficient commandlines that do what you want. For information on what options these settings toggle, check the output of x264.exe --fullhelp.

### profile

Default: not set

Limit the profile of the output stream. If you specify a profile, it overrides all other settings, so if you use it, you will be guaranteed a compatible stream. If you set this option, you cannot use lossless encoding (--qp 0 or --crf 0).

You should set this if you know your playback device only supports a certain profile. Most decoders support High profile, so there's no need to set this.

Values available: baseline, main, high.

### preset

Default: medium

Change options to trade off compression efficiency against encoding speed. If you specify a preset, the changes it makes will be applied before all other parameters are applied.

You should generally set this option to the slowest you can bear.

Values available: ultrafast, superfast, veryfast, faster, fast, medium, slow, slower, veryslow, placebo.