Split video to send it via rtp

Hi,
I have an application that send a pre encoded h264 file over the network. When i send them, the receiver decode it and display it on his screen. The problem is that when i have a large sequence, the rtpsender is not able to send it. I am looking a way to split this video.Now i am send a MemoryStream which holds the video sequence. I tried to split this MemoryStream but the receiver doesn't accept it as video format. How can i create rtp packets and keep them on a buffer in order to send the one by one.