Can't preview and edit Sony RX10 III XAVC S 4K video in FCP X, FCP 7 or FCP 6? In this article, you will learn the best way to import and edit Sony RX10 III XAVC S files in Final Cut Pro without any issue on Mac OS X. Just follow it. Sony RX10 III Announced - Records UHD 4K video in XAVC S format Sony Announced its RX10 successor, the camera comes with new 20.2 MP, 1" Exmor RS BSI CMOS stacked CMOS image sensor with a DRAM chip, with the help of newly developed tech the camera can capture more sharp images with improved color and contrast ratio, when the DRAM chip is integrated into the Bionz .