We began the Perian project over 6 years ago. We wanted to simplify viewing your content. Our team has attained that goal and with that in mind, Perian will be retired soon. Our stewardship has been a blast but it’s time for all of us to move on.
Thank you Perian team for your hard work. I have been using Perian for a long time. Not only it lets me play so many video formats, it also makes OS X’s Quicklook much more useful.