[M4IF Technotes] BVOPs question

[Klaus Leopold]

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Hi *,
I'm using the Microsoft-FPDAM MPEG-4 codec for encoding videos and have a
question about BVOPs:
I encoded different streams (ISO conformance - foreman, silent, etc.) with
differnt numbers of B-VOPs. I noticed that on adding B-Frames the overall
file size of the video INCREASES. The overhead for the silent stream is for
example 10 % if I encode it with 2 B_between_P and 9 P_between_I to 0
B_between_P and 24 P_between_I.
The theory about B-Frames says that they provide the highest level of 
compression. So my logical implication is that videos with B-Frames should be 
smaller than videos without B-Frames. Why does the Why does the FPDAM codec 
bahave different??
Klaus
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