[Mp4-tech] small corrupted blocks in ISO/IEC 14496-2 Simple Profile bitstream

[John Lam]

Dear all,
I'm now using a hardware MPEG-4 video codec conformed to ISO/IEC 14496-2 
Simple Profile, I put the encoded bitstream into a MP4 file format. When 
I play it with QuickTime player 6.3, some small corrupted blocks can be 
seen, the corrupted patterns (in a block) are similar and the location 
of the blocks seems random for each frame. I want to know is there 
something wrong of the generated bitstream. I wonder if there is error 
data from some macroblocks. If anyone may have idea on it, I can send 
you two snapshots when playing with QuickTimer player and the whole MP4 
file to you directly. Thank you!
-- 
Best Regards,
___________________________________________________________________
John Lam <johnlam fujitsu-hkdc.com>
Phone : (852)2736-3232 Direct : (852)2737-9655 Fax : (852)2314-4207
Fujitsu Microelectronics Pacific Asia Ltd., Design Centre