[Mp4-tech] Random drop data in MPEG4 encoded bitstream to simulate wireless media straming

[Amy, Meihsuan Lu]

Hi All, 
I am trying to do some wireless video straming experiment. I use a MPEG4
encoded bitstream created by Microsoft MPEG-4 Visual Reference. What I did
is to randomly drop some parts of data in the bitstream (to simulate packet
error in wireless). However, after I did so, the modified bitstream became
NOT decodable (It caused MS FGS decoder crashed!!!). So did I miss any point
here? Is this because MS FGS decoder not well written? 
Thanks a lot
Amy Lu