What is the right file signature?

I want to have a correct table of file signatures. I found two sites that have a big table of file signatures but when comparing those two, I saw that there was a different.

For example, on this site, the 3gp file signature is listed as 66 74 79 70 33 67.

On this other site, the file signature of 3gp is as following: 00 00 00 14 66 74 79 70.

What is the right one? If I would check a 3gp file, what would be the first bytes of this file?

Answer

Attribution
Source : Link , Question Author : sirzento , Answer Author : Community

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