The translucency of the image. A value of 0.0 makes the image completely transparent, and 1.0 makes the image completely opaque. Note that if the image is already semi-transparent, setting this to 1.0 will not make the image completely opaque.
The whitespace between the adjacent edges (determined by position) of the video and the image. 0.0 indicates no padding, and 1.0 indicates a fully padded video width or length, as determined by the algorithm.
The location of the image. Valid positions are: upperRight, upperLeft, lowerLeft, lowerRight, and center. Note that center ignores the padding parameter.
The size of the image relative to the overall size of the video. This parameter will adapt to horizontal and vertical videos automatically. 0.0 indicates no scaling (use the size of the image as-is), and 1.0fills the entire video.