Perian is a free open source component for QuickTime so that you can play many popular media types like AVI, DivX, XviD, WMV, FLV, MKV, etc. with QuickTime without converting them first. However, if you've upgraded to the latest OS X 10.8 Mountain Lion, you'll be disappointed since Perian for Mountain Lion is not provided any more and Perian developers have no plan to update the plug-in to support OS X 10.8 Mountain Lion. The good news is that there are some alternatives to Perian for Mountain Lion, such as VLC Media Player, which can play videos in various formats.
However, if you want to play your videos with your favorite QuickTime Player, then another Perian alternative is needed. That's Aimersoft Video Converter for Mac. With it, you can fast convert all regular video formats like AVI, WMV, FLV, MKV, 3GP, M2TS, MPG, etc. to QuickTime compatible MOV, MP4 or M4V so that you can play the videos with QuickTime. Now simply get this Perian replacement for Mountain Lion and follow the easy steps to make all your videos playable with QuickTime Player!
Download Perian Alternative for Mountain Lion:
How to convert video to QuickTime friendly formats
1Import videos
Run the app and click "Add Video Files" from "File" menu or directly drag&drop videos to the item bar to import the videos you need to convert. You can convert multiple files at a time to save time and select the subtitle and audio track you prefer if there are many.
2 Select an output format
If you want to play the converted videos with QuickTime, then you can simply click the format icon beside each video clip and select MOV from Common Video as the output format. And if you want to play the videos on your iPhone, iPad, iPod, etc., you can either choose M4V or a video preset to get videos that best fit your device.
3 Start conversion
At last, click Convert to start converting your videos with this alternative to Perian on Mountain Lion. When the conversion completes, open the default folder to get the converted videos. (The default output folder is /Users/USERNAME/Movies/Aimersoft Video Converter. You can click Preferences > Convert to set an output folder.) Then enjoy your videos with QuickTime or on your portable devices!
Download Mac Video Converter:
Follow us on Twitter
Perian is a plugin that works with QuickTime. None of what you've said replaces Perian. They simply play or convert the video. Very different things