@benwaggoner
https://bitbucket.org/multicoreware/...cpp#lines-3316
Code:
if (p->internalCsp != X265_CSP_I420 || p->internalBitDepth != 10 || p->vui.colorPrimaries != 9 ||
p->vui.transferCharacteristics != 16 || p->vui.matrixCoeffs != 9)
So, if any of the following are NOT true x265 will disable hdr-opt
4:2:0
10 bit
color primaries = 9 (bt2020)
transfer characteristics = 16 (smpte2084)
matrix coefficients = 9 (bt2020nc)
It does look like you're set up correctly, so no idea why this is happening.
I've found hdr-opt to be helpful for Dolby Vision Profile 5 encoding, which is incompatible with the required VUI to enable it, so I just patched out the above code block
