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I have a file that only contains the mdat atom in a MP4 container. The data in the mdat contains AVC data. I know the encoding parameters for the data. The format does not appear to be in the Annex B byte stream format. I am wondering how I would go about parsing this. I have tried searching for the slice header, but have not had much luck.
Is it possible to parse the slices without the NAL’s?
AVC NAL units are in the following format in MDAT section:
[4 bytes] = NAL length, network order;
[NAL bytes]
Shortly, start codes are simply replaced by lengths.