[Mp4-tech] h264 byte stream format question

[Victor lyamtsev]

Hello,
I have to parse H264 files to read NAL units. I found that there's always 4
bytes offset
between end marker of one NAL and start of another.  The file can't be
decoded if I try to remove  those offsets - I see "codec not found" error
when I run decoder on the "reduced" file. Aren't NAL's supposed to be self
contained? Do those 4 bytes contain some meaningful information, or just
provided for alignment? If so, how should the NAL's be re- aligned when I
read them from file?
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