In the real time video surveillance network system, if the initial video data received by the monitoring client is not complete, the screen will show blurred screen. For H.264 coding standard, this paper designs and implements real time video stream dispatch plugin based on the open source multimedia GStreamer framework. The plugin uses a randomly requested source pad to dispatch video data. It also caches current IDR frames group to ensure the integrity of initial IDR frame to be sent. The plugin can be used in streaming media server to solve the problem of the blurred screen of initial screen effect in video surveillance. Experiment shows that the streaming media server with this plugin can effectively distribute the real time video data and ensure the integrity of the initial playback screen, which has a significant effect on improving the real-time monitoring effect.