webm libvpx-vp9
# YOUTUBE - Ultra High Definition video
# More VP9 options if choose format of webm
-# Refer to section 3.4 in Features5.pdf
+# Refer to Appendix C.3 in Cinelerra_GG manual
# 3840x2160 (50 or 60 frames per second)
bitrate=18000k
minrate=9000k