Quote:
Originally Posted by me too
sir
i have an epub 2 , how can i updrade it to epub3,
will some can provide me with the css,content.opf for the epub that contains video and audio or an epub
plz.....
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Take your ePub you already have, extract the CSS, OPF, XML, NCX and have a look at it all. There you have the code you need for your ePub. What you are asking for is like trying to get better sound from an MP3 by converting to to FLAC.
You will find that most people don't want audio/video in their eBooks. Also, given that there are so few programs that will actually handle audio/video, it's not worth the hassle for something we don't actually want.