I didn't test it yet, but just by reading the readme:
Quote:
VirtualDub: SetClipping(x1, y1, x2, y2)
AviSynth: crop(x, y, width-1, height-1)
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avisynth crop is crop(x,y,width,height), no -1 involved.
Since avisynth 2.0.? you can use negative values for crop width and height that will be interpreted as distance from the right and bottom border; vdub parameters will map to Crop(x1,y1,-x2,-y2).
Maybe we could do the same for Trim, were a negative value would mean 'framecount' instead of 'last frame' ?