VHS style filter for G'MIC

vhs.gmic

#@gui VHS filter: vhs_filter_command, vhs_filter_command
#@gui : note = note("Filter for applying VHS effect over image")
#@gui : sep = separator()
#@gui : Chromatic aberration = float(3,0,100)
#@gui : Noise = float(15,0,100)
#@gui : Chroma blur = float(20,0,100)
#@gui : Luma blur = float(5,0,100)
#@gui : Sharpen = float(1,0,1)
vhs_filter_command :
    -split c
    -shift[0] $1
    -append c
    -noise $2,0
    -rgb2yiq
    -split c
    -blur_x[1,2] $3
    -blur_x[0] $4
    -append c
    -yiq2rgb
    -unsharp $4,$5