get_file_extension_from_caps
Description:
Returns a possible file extension for the given caps, if known.
Parameters:
| caps | 
           the (fixed) Caps for which a file extension is needed  | 
      
Returns:
| 
           a newly-allocated file extension string, or NULL on error. Free string with g_free when not needed any longer.  | 
      
Namespace: Gst.PbUtils
  
  Package: gstreamer-pbutils-1.0