A question about the first mdat box of the fmp4 file
The header of the first mdat box of the fmp4 file has a section of file description information data, is this section of information necessary? If not, will it affect the decoding of the fmp4 file?
Solution
That is informational metadata written into an SEI by x264. It is not related to mp4 in any way. No it is not required.
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