Using -crf 0 instead of -qp 0 gives an SSIM index slightly below 1 for some reason. Since Resolve can't read that uncompressed format I encoded it to lossless h.264 using -qp 0 in ffmpeg and verified that the SSIM index was 1 = lossless. I used the crowd_run_2160p50.y4m UHD clip available at as a reference. But even the software encoder seems to have improved a great deal. In older versions of Resolve (like v12) the included encoder wasn't very good and I basically never used it. Since v15.2 the Studio version of Resolve for Windows and Linux can use hardware accelerated Nvidia and Intel Quick Sync encoders in addition to Resolve's native software encoder. Inspired by Bryans great work in mapping the SSIM index of Youtube videos using different source encodes, I thought I'd take a look at the recent additions to h.264 encoders in Resolve v15.
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