Please describe the problem:
I've had some issues with the mad element when used with gnonlin. I modified the test program, which comes with gnonlin to play it mp3-s and it wasnt success.

test1:
======
Expected behavior: 
                      first gnl source | secound gnl source
start in pipeline       0s             |   5s
start in media          0s             |   0s
duration                5s             |   3s

Experience behavior: 
 The gstreamer is playing the first source from 0th sec to 5th sec, and doesn't play the secound source.



test2:
======
Expected behavior: 
                      first gnl source | secound gnl source
start in pipeline       0s             |   5s
start in media          0s             |   20s
duration                5s             |   3s

Experience behavior: 
 The gstreamer is playing the first source from 0th sec to 5th sec, and doesn't play the secound source.


test3:
======
Expected behavior: 
                      first gnl source | secound gnl source
start in pipeline       0s             |   5s
start in media          20s            |   10s
duration                5s             |   3s

Experience behavior: 
 The gstreamer is playing the first source from 0th sec to 5th sec, and doesn't play the secound source.




test4:
======
Expected behavior: 
                      first gnl source | secound gnl source
start in pipeline       0s             |   5s
start in media          20s            |   10s
duration                5s             |   3s

Experience behavior: 
 The gstreamer is playing the first source from 0th sec to 5th sec, and doesn't play the secound source.


Steps to reproduce:


Actual results:


Expected results:


Does this happen every time?


Other information: