Summary: The Avid Media Composer 6 won’t import MXF files from Canon XF100, XF105, XF300,XF305. The easy workaround is to transcode MXF to Avid Media Composer natively supported format - DNxHD. Here is a quick-stare guide.
Canon XF100, XF105, XF300, XF305 camcorders are considered a landmark in the groups of Canon's professional high definition camcorder, which appeal to a wide range from videographers or film-makers to photography fans, which is featured with MPEG-2 Full HD 4:2:2 recording(MXF format) on CompactFlash at up to 50Mbps. However, users find it’s difficult to import Canon MXF clips to Avid Media Composer or other NLE system.
As far as I know, MXF is a self-container format which is unacceptable by various non-linear editing systems (NLE), like Avid Media Composer(5/5.5/6/6.5), Pinnacle Studio, Final Cut Pro (FCP 6/7/X), Sony Vegas, Adobe Premiere Pro(CS3/CS4/CS5/CS6), etc. In order to import the MXF files from Canon camera to Avid Media Composer for editing, the easy workaround is to transcode Canon MXF files to Avid MC compatible video formats. Along with some help from a top MXF Converter, it can be done. To help those who wanna edit MXF files in Avid Media Composer without problems, here I share with you a simple guide on how to convert MXF files to edit in Avid Media Composer CS6.
First of all, downloading the App- Brorsoft MXF Converter for Mac
Overall, the program is a professional yet easy-to-use MXF to Avid DNxHD Converter on Mac(Mac OS X Mountain Lion included) which can not only convert XF100, XF105 and XF300, XF305, C300, Panasonic P2 recorded MXF files, but also provide simple video editing functions for you. The MXF to Avid MC Converter can convert MXF videos from HD camcorders or DVs (like JVC, Panasonic, Sony and Cannon) for editing in Avid MC, Adobe Premiere Pro, Final Cut Pro, iMovie, etc. The equivalent Windows version is Brorsoft MXF Converter, which can transcode MXF files for Windows editing smoothly. Just download it and follow the tutorial below to get Avid Media Composer and MXF files to work beautifully.
Converting MXF to DNxHD that Avid Media Composer 6 handles well:
Step 1. Launch the Mac MXF to Avid Converter. Drag and drop .mxf clips to file list. The converter works with MXF shootings taken with Canon XF series.
Step 2. Set Avid DNxHD MOV as output format. Click on "Format", and select output format from the drop-down list. Follow "Avid Media Composer" > Avid DHxHD (*.mov)”.
Tip: Adjust video resolution, bit rate, frame rate, etc.[/b]
Click "Settings" button if you’d like to customize advanced audio and video parameters like Video Codec, aspect ratio, bit rate, frame rate, Audio codec, sample rate, audio channels.
Step 3. Click the convert button under the preview window; the MXF converter will start converting MXF to Avid MC immediately. Soon after the conversion is finished, just click “Open” button to get the generated files for edit in Avid Media Composer 6 as well as Avid MC 5/5.5/6.5 perfectly.
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Source:Best way for Editing Canon MXF clips in Avid Media Composer