[Mp4-tech] Live streaming of Mpeg-4

[=?big5?q?Derek=20Chow?=]

Hi all,
I am a student and wants to write a program do to live
streaming of mpeg-4 encoded video with Darwin
Streaming Server, so I need to packetize the encoded
video samples into RTP packets. 
I'm using DirectShow to do capturing and encoding and
I'm going to write a renderer filter to packetize the
Mpeg-4 video. 
I've read through RFC3016 and have some basic idea on
how to packetize Mpeg-4 video, but I'm not sure how to
extract VOP (Video Object Plane) header and VOP
fragment from the stream I receive by the renderer
filter. Could any one of you give me some idea on VOP
header and how I can define, identiry or extract VOP
header and VOP fragment from a live mpeg-4 encoded
video stream. 
I would appreciate any answer on this issue.
Thx a lot.
Derek
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