Samsung TV 4K has no direct support for neither the video codec or bit rate of the footage recorded with Sony RX10 II/III. To get RX10 II/III 4K XAVC S video played on Samsung 4K TV, you can download Pavtube Video Converter for Windows/Mac.
Official Guide(More details here): http://www.pavtube.com/play-rx10-ii-iii-4k-on-samsung-4k-tv.html
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