[Libav-user] Identifying a MP4 file using libav libraries
Carl Eugen Hoyos
cehoyos at ag.or.at
Tue Apr 12 20:41:52 CEST 2016
Sreenath BH <bhsreenath at ...> writes:
> We will use major_brand metadata to check if it is a MP4 file.
> For now we will assume a file is MP4 only if major_brand has
> a value of mp42.
Note that the mp4 files produced by FFmpeg have major_brand
"isom" and older files often have "mp41". Generally, it may
(or may not) make more sense to test the compatible_brand.
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