[StainlessS]

To maybe avoid possible misunderstanding and unnecessary work,

        ffms2_ORDERED_Function_List 


There follows a list of all function names together with CPP style argument specifiers that inform
Avisynth the argument types and optional names. Optional arguments have square brackets surrounding
their name as in [name] and are followed by a type specifier character that gives the type.
Unnamed arguments are not optional. eg "cc[arg1]b[arg2]i" would be two compulsory unnamed clip args,
followed by optional 'arg1' of type bool and optional 'arg2' of type int.

# Argument type specifier strings.
 c - Video Clip
 i - Integer number
 f - Float number
 s - String
 b - boolean
 . - Any type (dot)
# Array Specifiers
 i* - Integer Array, zero or more
 i+ - Integer Array, one or more
 .* - Any type Array, zero or more
 .+ - Any type Array, one or more
#    Etc
###################################


FFAudioSource "[source]s[track]i[cache]b[cachefile]s[adjustdelay]i[utf8]b[varprefix]s"
FFGetLogLevel ""
FFGetVersion  ""
FFIndex       "[source]s[cachefile]s[indexmask]i[dumpmask]i[audiofile]s[errorhandling]i[overwrite]b[utf8]b"
FFSetLogLevel "i"
FFVideoSource "[source]s[track]i[cache]b[cachefile]s[fpsnum]i[fpsden]i[threads]i[timecodes]s[seekmode]i[rffmode]i[width]i[height]i[resizer]s[colorspace]s[utf8]b[varprefix]s"

Perhaps it is not the standalone, but plugin function that is required. [Ffindex.Exe is not required to call ffindex() in script].

and just for good luck.

        LSMASHSource_ORDERED_Function_List 

LSMASHAudioSource  "[source]s[track]i[skip_priming]b[layout]s[rate]i[decoder]s"
LSMASHVideoSource  "[source]s[track]i[threads]i[seek_mode]i[seek_threshold]i[dr]b[fpsnum]i[fpsden]i[stacked]b[format]s[decoder]s"
LWLibavAudioSource "[source]s[stream_index]i[cache]b[av_sync]b[layout]s[rate]i[decoder]s"
LWLibavVideoSource "[source]s[stream_index]i[threads]i[cache]b[seek_mode]i[seek_threshold]i[dr]b[fpsnum]i[fpsden]i[repeat]b[dominance]i[stacked]b[format]s[decoder]s"