gentoo-overlay/media-video/x264-encoder/metadata.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE pkgmetadata SYSTEM "https://www.gentoo.org/dtd/metadata.dtd">
<pkgmetadata>
  <maintainer type="project">
    <email>media-video@gentoo.org</email>
  </maintainer>
  <use>
    <flag name="avs">enable AvxSynth support in the AviSynth input module</flag>
    <flag name="ffmpegsource">Enable ffmpegsource aka ffms support, disables lavf</flag>
    <flag name="interlaced">Enable interlaced encoding support, this can decrease encoding speed by up to 2%</flag>
  </use>
</pkgmetadata>