Track
Description:
Creates a new track with the given track-type and caps.
If type is VIDEO, and caps is a 
      subset of "video/x-raw(ANY)", then a VideoTrack is created. This will 
      automatically choose a gap creation method suitable for video data. You will likely want to set 
      restriction_caps separately. You may prefer to use the 
      VideoTrack method instead.
If type is AUDIO, and caps is a 
      subset of "audio/x-raw(ANY)", then a AudioTrack is created. This will 
      automatically choose a gap creation method suitable for audio data, and will set the 
      restriction_caps to the default for 
      AudioTrack. You may prefer to use the 
      AudioTrack method instead.
Otherwise, a plain Track is returned. You will likely want to set the 
      restriction_caps and call 
        ges_track_set_create_element_for_gap_func on the returned track.
Parameters:
| type | The track_type for the track | 
| caps | The caps for the track | 
Returns:
| A new track. |