Trouble is, we don't have native 4k video capture at 60mbps to compare properly, since the GH4 captures at 100mbps, and compression to 60mbps would entail IQ loss anyway, a fate of all MP$ or other "lossy" formats. Sony might argue that XAVC-S delivers essentially the same perceived IQ at 60mbps that MP4 delivers at 100mbps. ![]() ![]() Other than branding, the only way one could know is to do a side-by-side test of XAVC-S and MP4, to see whether their is a quality difference, or whether one supports grading or editing better or easier than the other. Or why is there MOV if MP4 will do, and so on. ![]() Sort of asking why the world needs Nikon lenses if Canon makes ones with a slightly different mount.
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