New MediaControl (gb.media)
Create a new 
MediaControl.
  - 
Parent: An optional container for the new control.
 
  - 
Type: The type of GStreamer plugin implemented by this MediaControl. It must be specified.
 
  
Here is the list of 
all current GStreamer plugins.
Caps filters
The 
Type now can use the same caps filter syntax used by the 
gst-launch program.
For example:
hFilter = New MediaControl(hParent, "audio/x-raw,channels=2,rate=48000")
This is a strict equivalent of:
hFilter = New MediaControl(hParent, "capsfilter")
hFilter["caps"] = "audio/x-raw,channels=2,rate=48000"