Most of users have problems when importing MKV files to Premiere Pro for some editing work, however, MKV files are not natively supported by Premiere Pro CC/CS6/CS5/CS4, but MPEG-2 does. In order to import MKV files into Premiere Pro, here I suggest you convert MKV files to MPEG-2 with a third party video converter.
Here, [b]Brorsoft[/b][b] Video Converter Ultimate / ( iMedia Converter for Mac )[/b] is highly recommended to help you convert MKV files to MPEG-2 for importing into Premiere Pro in fast encoding speed and excellent quality.
Overall, it's an all-in-one Video, Blu-ray/DVD converter that can rip and convert Videos, Blu-ray/DVD discs, ISO/IFO files, Video_TS files to more popular formats like Apple Intermediate Codec, ProRes, DNxHD MOV that seamlessly fit iMovie, Final Cut Pro, Avid Media Composer.