hi, I'm also having trouble. VirtualDub Error: Avisynth open Failure wmultof must be non zero ... line 8 here is the avs script: LoadPlugin("F:\AutoGK\DGMPGDec\DGDecode.dll") LoadPlugin("F:\AutoGK\filters\autocrop.dll") LoadPlugin("F:\AutoGK\filters\RemoveGrainSSE3.dll") movie = DirectShowSource("D:\TV\test.avi",23.976).KillAudio() movie = isRGB(movie) ? ConvertToYV12(movie) : movie movie = isYUY2(movie) ? ConvertToYV12(movie) : movie cropclip = autocrop(movie,mode=0,wmultof=4,hmultof=4,samples=10,aspect=0,threshold=0,samplestartframe=0,leftadd=0,rightadd=0,topadd=0,bottomadd=0) fixed_aspect = 1 c_width = width(cropclip) c_height = round(height(cropclip) / fixed_aspect) input_par = float(c_width)/float(c_height) input_par = (input_par > 1.4)