[Mp4-tech] How to write IPB frames to a new mp4 file?

[Newtun]

Hi, dear forks!
I am working on a camera driver now. The driver can read encoded IPB frames from the camera directly. each frame starts with hex code "
00 00 01 B0 F5 00  00 01 B5 09  00 00 01 00 00 00 
01 20 00 C8 88 B0 E0 E0 FA 61 40 83 C2 83 07 00 
00 01 B3 00 10 07 00 00 01 B6 ...      ". 
I can use quicktime to play the mpeg-4 video stream through RTSP. Now the problem is that  I want to save the IPB frames to a MPEG-4 file (with no audio). But I don't know MPEG-4 file format. I have struggled for a few days but still can't find the way. Anybody could help me out? Is there any references you can tell me? Thanks a lot.
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