[question]resolve the type of disc on DVD-rom

[虞申鹏]

Hi,every one

Now, we can play the DVD and the CD from DVD-rom by QT + gstreamer.

・Play DVD → uri=dvd://
  element=libdvdread
・Play CD → uri=cdda://
  element=libcdio

But we want to select the uri automatic.
Is there any gst's element can resolve the type of disc on DVD-rom?

Or ,how can we know the type of disc？

Please give me some tips.

Thank you very much.

------
Yu
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