[Swfdec] Problem in compiling swfdec on ubuntu

[ying lcs]

HI,

I am trying to compile swfdec on ubuntu.

But when I run configure , I get the following error:
checking for GST... no
configure: error: Couldn't find GStreamer 0.10.11 and gstreamer-pbutils 0.10.15.

I check the package manager on my package manager, i think GStreamer
is already installed.

Can you please tell me how to fix my problem?

Thank you.