codecs.conf entry:

videocodec msud
  info "MSU Lossless video codec"
  comment "http://www.compression.ru/video/ls-codec/index_en.html"
  status working
  fourcc MSUD
  driver vfw
  dll "MSUlvc06.dll"
  out BGR32,BGR24 flip


it looks promising 1/3 of huffyuv

works fine on win32, needs a binary patch on wine loader
since it wants to read from registry

dll needs to be patched at 0x4a0
75 05 -> 90 90

without the patch:
on linux the decoder fails to start
the encoder crashes mencoder but I was not
able to trace the problem, probably a bug in the codec:

63339deb812097d7b5c9ce90e892b2c0  MSUlvc06.dll
fbe8e5eec22d0d656eb077f7f9cb29ce  MSUlvc06.dll.orig