Apple's free iBooks Author is an easy way to get started in electronic textbook publishing. Just know there's a middleman standing between you and your adoring public: Apple. Read more about Apple's tricky software license agreement, which as InformationWeek's Thomas Claburn points out, puts severe restrictions on authors' rights. BYTE's Chris Spera has his own opinion about
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You can use the Quicktime software that comes bundled with Mac OS X to convert common video types to iBooks Author's preferred M4V format. Quicktime also can resize video to the required 720p (or lower) video resolution.