The question speaks for itself.
I was able to tune Xvid encoding parameters such as motion search, VHQ and to enable Quarter Pixel and GMC aswell, through a profile edit but I can't find other options than those:
<motion motion_search="6" vhq="1" qpel="0" gmc="0" chroma_me="1" />
(Parameters I use)
I'm searching a way to enable B-frames at least as many mobile devices support this option which is very critical in the final quality.
Hoping to have an answer