I’m using a Canon C100 and once tried to import the C100 MTS to Adobe Premiere for editing, but problems always occurred. Searching the web, Canon C100 to Adobe Premiere Pro issues and workarounds have been talked about by various users. I tried to follow these instructions like using Clipwrap to wrap each of the MTS files into QuickTime, but it didn't work. Fortunately, I worked out a solution by myself. It takes me some time and effort although, it works for me. I will share the way in the following paragraphs. Guys here who are also stuck in the trouble, just read on.
The way that Canon records the AVCHD clips is really a PITA. It is always great when a company (Adobe) acknowledges a bug and pledges to work on fixing it BUT, it has been my experience that you never know when the fix will finally come. I can't have clients getting pissed because of all the hassles they are having with files. To get Adobe Premiere Pro ingest C100 MTS clips perfectly, what I’ve done is to find a professional AVCHD MTS converter app and then transcode C100 MTS to Premiere Pro edit-friendly format.
To get the work done easily, here Brorsoft MTS/M2TS Converter for Mac, as the best video converter for Canon C100 is highly recommended. With it, you can transcode C100 .MTS to MPEG-2 for Premiere Pro, ProRes for FCP, AIC for iMovie/FCE…, which will save you both time and trouble. And all you need is to drag the result videos for playing & editing. For Windows user, please get MTS/M2TS Converter. Now the following article will show you how to convert Canon C100 MTS to Adobe Premiere Pro editable format in detail.
Tutorial: Converting Canon C100 MTS videos to Adobe Premiere Pro MPEG-2 format
Step 1. Import MTS to the converter
Run the AVCHD MTS converter and click the Add Files button to import the MTS videos from C100 or hard drive to be converted. The converter supports converting multiple files at a time.

Step 2. Choose the output format
Click "Format" drop-down bar to select a proper video format. To edit AVCHD videos in Adobe Premiere, then Adobe Premiere/Sony Vegas > MPEG-2 (*.mpg) is the suitable one.

Tip: The best MTS to Premiere Pro Converter enables users to adjust audio and video settings before transcoding AVCHD files. Click "Settings" button, then you will enter the following interface, on which you are allowed to customize size, bit rate, frame rate, sample rate, and audio channel to your required ones.

Step 3. Start C100 MTS to Premiere conversion
Hit the big Convert button on bottom of the main windows and the conversion from Canon C100 MTS to MPEG-2 for Adobe Premiere Pro will begin immediately.
After the conversion, you can click "Open" button to get the output files effortlessly. Now you have got it right, just to import and edit Canon C100 MTS with Adobe Premiere Pro CC/CS6/CS5/CS4 without hassle.
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