<flag name="libass">Enable OSD (On Screen Display) and subtitles support via <pkg>media-libs/libass</pkg></flag>
<flag name="libmpv">Build mpv shared library</flag>
<flag name="lua">Enable Lua scripting, OSC (On Screen Controller) GUI and <pkg>net-misc/youtube-dl</pkg> hook-script</flag>
- <flag name="opengl">Enable the recommended 'opengl' video output</flag>
+ <flag name="opengl" restrict="<media-video/mpv-0.28.0">Enable the recommended 'opengl' video output</flag>
+ <flag name="opengl" restrict=">=media-video/mpv-0.28.0">Enable support for various OpenGL-based video backends</flag>
<flag name="raspberry-pi">Enable support for the Raspberry Pi</flag>
<flag name="rubberband">Enable high quality pitch correction via <pkg>media-libs/rubberband</pkg></flag>
<flag name="sdl">Enable <pkg>media-libs/libsdl2</pkg> based video and audio outputs