Attaches the match metrics calculated by Telecide (decomb package) to frames as properties. Primarily intended for use with Wobbly.
YUV420P8 input required.
Usage: dmetrics.DMetrics(vnode clip[, bint tff = False, bint chroma = True, int nt = 10, int y0 = 0, int y1 = 0, string prefix])