Decoding mpeg4 frames failure using Media Foundation

I am trying to decode mpeg4 frames using media foundation with no luck. Using MFTrace i've found that the decoder keeps requesting samples but produces no decoded image. MFTrace log also highlights that the decoder returns need more input.

Currently i am only sending the keyframes to the decoder. All the properties have been set correctly.

Is there something wrong with the mpeg4 decoder on Windows 7 machine or am i doing something wrong.

Any ideas or suggestion would be really helpful as i have been stuck with this problem for over a week now.

Thanks