BPFade

user_element:       The user material
width:              Width of the video, default value is 720 
height:             Height of the video, default value is 1280
element_duration:   Duration of video 
action_configDict:  Provide users with the ability to modify 
                    the configuration of internal actions with caution
element_configDict: Provide users with the ability to modify 
                    the configuration of internal element with caution
fadeinTime:         Duration of fading in.
fadeoutTime:        Duration of fading out. 
fade: 
                    None: Add fade-in and fade-out elements
                    in: Add fade-in elements
                    out: Add fade-out elements 
alpha_list:         Transparency control list

Examples of video:

fade-in and fade-out

fade-in

fade-out