Sony had expanded XAVC to the consumer market with the release of XAVC S, which supports resolution ups to 3840 x 2160 with MP4 container format and AAC or LCPM for the audio. The XACV S format has been used in the Sony FDR-AX100 4K Ultra HD consumer camcorder and Sony HDR-AS100V action camera. The Sony A7S as well as some consumer stills camera with movie support also offer XAVC-S.
Software that supports XAVC S editing and production include CyberLinke PowerDirector, Adobe Premiere Elements, Apple's iMovie 10, Pinnacle Studio 18 Ultimate and Sony Movie Studio Platinum. Avid Media Composer, the most widely used NLE for professional film and video editing, is out of luck to be excluded. To import Sony XAVC S to Avid Media Composer for smooth editing, a third-party software is required to convert XAVC S to DNxHD, a codec technology used by Avid is engineered to create mastering-quality media at reduced file size for faster and fluid workflow.
The XAVC S format products are recorded on the fastest SD cards(SDXC), the recorded footage can be transferred to you computer in the following 3 ways:
1. Directly connect the camera/camcorder to the computer via a USB cable.
2.Remove the SDXC card from the camera/camcorder and then plug it into the computer.
3.Fit the computer via the SDXC media adaptor.
After you have successfully transferred Sony XAVC S from the camera/camcorder to the computer, you can then use Pavtube iMedia Converter for Mac, a splendid application to help you to transcode Sony XVAC S to Avid Media Composer natively supported DNxHD codec.
How to encode Sony XAVC S to Avid Media Composer on Mac?
Step 1：Load Sony XAVC S files.
Click "File" drop-down "Add Video/Audio" or "Add from folder" option to add the Sony XAVC S files that have been transferred from your camera/camcorder to your Mac hard drive.
Step 2: Specify output file format.
From "Format" drop-down lists, you can select Avid Media Composer preferable editing codec from "Avid Media Composer" > "Avid DNxHD(*.mov)" as the output format.
Step 3: Merge into one file.
Check the 
icon on the main interface to join your captured separate footage together into one single video.
Step 4：Convert Sony XVAC S to Avid Media Composer.
After all the parameter setting is completed, you can start the conversion process by hitting the right-bottom convert button.
When the conversion is done, hit the "Open" button on the main interface to locate and locate and find the converted files. Then continue with your fast and fluid post workflow of Sony XVAC S footage with Avid Media Composer on Mac OS X.
