[gst-devel] How can make playbin use my decoder to play some files

[gtxia]

Hi all.

I am developing some decoder that are compatible with gstreamer
framework. Now I can use the functions such as gst_element_factory_make
to create my own decoder and add it a pipleline. It can play some file
with my own decoder well, but when I test my decoder with playbin, it
always complains "Message: don't know how to handle EMPTY
Error: You do not have a decoder installed to handle this file. You
might need to install the necessary plugins." What kind of functions
that I must implement to eliminate this complains.

Thanks for any hint.

regards

XiaGuangTai