Gets and sets the property Opacity.
A percentage that indicates how much you want a watermark to obscure the video in
the location where it appears. Valid values are 0 (the watermark is invisible)
to 100 (the watermark completely obscures the video in the specified location).
The datatype of 
CopyC# is float.
Opacity
Elastic Transcoder supports transparent .png graphics. If you use a transparent .png,
the transparent portion of the video appears as if you had specified a
value of 0 for CopyC#. The .jpg file format doesn't support
transparency.
Opacity
Declaration Syntax| C# |
public string Opacity { get; set; }