gstreamer playbin2 gst_element_query_duration fail

[Lelong Tristan-B44337]

Hello,

I am trying to read the duration of a mp3 file in a custom basic player 
made using playbin2. I noticed that the duration is wrong 
(99:99:99.999999999) as long as I don't spend a few millisecond in the 
PLAYING state. Is that normal, and is there an easy way to modify this?

I am using gstreamer 0.10.35 with gst-plugins-base 0.10.35

Best regards