Quote:
Originally Posted by Aerys
Just want to chime something, an epub with audio/video does not automatically mean that it's an epub3 file. iBooks uses epub2 format and accepts some epub3 declarations in it which means it allows video/audio tags to work plus javascript.
A true epub3 file should follow the epub3 specs of IDPF (i.e. folder structure, navigation, opf, html5/css3 declarations, etc.).
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Please be aware that as soon as you add audio/video to an ePUB2 file, it is no longer valid ePUB2! The reason it works in iBooks because the Apple developers were too lazy to program a reading engine following the specifications and used web-kit instead. That caused a lot of non-compatible issues already.
I agree that adding audio/video also doesn't mean it is automatically following the specifications of ePUB3.