Thank you both! wink
(sry, for late reply)

I created a avisynth script:

SetMemoryMax(1024)

PluginPath = "C:\Program Files (x86)\MeGUI\tools\avisynth_plugin\"
 LoadPlugin(PluginPath+"svpflow1.dll")
 LoadPlugin(PluginPath+"svpflow2.dll")

#!!! Load MVTools 2.5
Plugin111 = "C:\Users\User\Downloads\MeGUI+Avisynth\mvtools-v2.5.11.22\"
LoadPlugin(Plugin111+"mvtools2.dll")

SetMTMode(3,9)
DirectShowSource("D:\User\Videos\Anime - OP&ED\2012\Hyouka\Hyouka - OP2.webm")
SetMTMode(2)
ConvertToYV12()

super_params="""{pel:2},
    {gpu:1},
    {scale:{up:2,down:4}}"""

analyse_params="""{block:{w:32,h:32}, 
    main:{search:{type:4,satd:true,
        coarse:{satd:true,trymany:true}}},
    refine:[{thsad:200}],
    special:{delta:2}}"""

super = SVSuper(super_params)
vectors = SVAnalyse(super, analyse_params)
SVSmoothFps(super, vectors, "{algo:23,
    mask:{cover:100,area:40},
    scene:{mode:0}}", mt=9)

#!!! Get MVTools-compatible vectors clips
forward_mv = SVConvert(vectors, false)
backward_mv = SVConvert(vectors, true)

#!!! Use any MVTools function. Padding should be zero.
super_mv = MSuper(pel=1, hpad=0, vpad=0)
MFlowFps(super_mv, backward_mv, forward_mv, num=60, den=1)

There comes the error:
SVSmoothFps: Invalid URL!

Could someone help me? Thanks!