2013年01月30日 How to chang "ISO Media, MPEG v4 system, version 1" to "version 2" [長年日記]
_ Install gpac-0.5.0.tar.gz
$ tar xvvf gpac-0.5.0.tar.gz $ cd gpac-0.5.0 $ ./configure $ make # make install
_ MP4Box
$ MP4Box -add input.mp4 -brand mp42 -new output.mp4
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