HELP:about command line in Demuxers setting for vlc2.0.5

[allenmyf]

i can use like this ,"vlc --demux_format=Avformat problem.ts", in vlc 2.0.2.

but i failed to set avformat in vlc2.0.5.
it's weird that this parameter can still be set in vlc2.0.5's menu, what's the problem? where can i find all commands for vlc2.0.5?

PS. can't find anything could help from "vlc --full-help"