"I'd like to convert .MKV files to prores for using in FCP X, I've tried Perian with quicktime and mpeg streamclip and while these will open the file it takes forever (probably 10 plus hours) to export as prores. Is there a better way, and if so what is the workflow?"
Final Cut Pro is a wonderful tool to help you turn your home videos into professional eye-catching movies. It normally can recognize a few file formats like DV, MOV, M4V, MP4 and some AVI files from cams. While MKV is not supported. In order to import MKV files to Final Cut Pro for editing, you'll need to convert MKV to FCP compatible video format. Since ProRes is the the most compatible codec introduced by Apple which ensures maximum editing quality and efficiency when working with Final Cut Pro, the quick option is to get a Mac MKV to ProRes Converter to convert MKV to Apple ProRes codec for Final Cut Pro.
The process to convert the files to ProRes is fairly easy and fast as long as you have such a tool like EaseFab Video Converter for Mac. The program is a professional yet all-in-one video conversion tool. With it, you can easily rewrap all MKV files to ProRes 422, ProRes 422 HQ or 4444 for using in Final Cut Pro. The main features of this MKV to FCP converter for Mac are high conversion speed with zero quality loss and supporting to convert from and to more than 70 formats like MP4, AVI, FLV, WMV, VOB, MOV, etc. Just download it and follow the tutorial below to convert MKV to Apple ProRes for editing in FCP.
Download the MKV to FCP Converter:
How to convert MKV to Final Cut Pro on Mac OS X(Yosemite and M avericks included)
Step 1. Add MKV files to the software
Drag and drop MKV videos to the application. Or you can click "Add Video" button to browse and locate your source video files. The app supports batch conversion, so you can add more than one file at one time.
Step 2. Set the output format - Final Cut Pro
The Profile tray locates in the buttom of the window. Go to the "Editing Software" category and select "Final Cut Pro" (ProRes 422 codec encoded MOV) or "ProRes" preset as the output format. By selecting the "Final Cut Pro" or "ProRes" preset, you needn't to adjust the video settings like video format, video resolution, frame rate and more by yourself.
Tip: Of course, if you're not satisfied with the settings, you can just click the "Settings" icon to customize the video/audio settings including the Bitrate of Video and Audio, Audio, Video Size, Sample Rate, Frame Rate, Audio Channels, etc.
Step 3. Start convert MKV to FCP on Mac
Once you press the "Convert" button, the Video Converter for Mac begins to work for you. Just a few minutes later, it is done.
When finished, the output ProRes encoded MOV file is ready for being imported to Final Cut Pro for editing. All FCP versions are supported, including Final Cut Pro X, Final Cut Pro 7 and Final Cut Pro 6.