Nageru, my free video mixer, can also produce Metacube streams natively.
See the manual at https://nageru.sesse.net/doc/ for more information.
+If you feel very adventurous, you can use LD_PRELOAD to load
+ffmpeg_metacube_hack.so into an FFmpeg-using binary. (This is
+experimental; native Metacube support is vastly preferred.)
+For instance, here's one way you can use the ffmpeg(1) binary
+to serve your webcam to Cubemap:
+
+ LD_PRELOAD=ffmpeg_metacube_hack.so ffmpeg -i /dev/video0 -f mpegts -listen 1 'http://[::]:9095'
+
+
To upgrade cubemap (after you've compiled a new binary), or to pick up new
config: