问题
Just one question : what is the size in bytes of the header of a .mp4 file ?
The goal is to fuzz just this header.
Thanks Karl
回答1:
It depends. ISO media container format (.mp4) uses a strusture of elements called atoms. It depends on the number of tracks, the H.264 encoding properties, the muxers also like to put their names in the file in a free atom.
Expect it to be at least 1 kByte. Anything over 4k is not very likely.
If you encounter the string mdat (header of the movie data atom), the file header is probably over.
来源：https://stackoverflow.com/questions/5230813/mpeg4-avc-header-size