AviSynth HDR to SDR

[spoRv]

After a while, I've found some ways to convert HDR 10bit bt.2020 video to SDR 8bit bt.709
Don't know which is better, so if anyone, after have tried them, want to chime in, it will help!

Script 1A

Code:

#Indexing FFVideoSource("any_HDR_video.mkv") #From 10bit to 16bit ConvertBits(16) #Reverse upscale to FULL HD with 16bit precision #(optional) #DeBilinearResizeMT(1920, 1080) #From YUV to XYZ with 16bit precision ConvertYUVtoXYZ(Color=0, OutputMode=1, HDRMode=0, fullrange=false) #Tone-mapping with 16bit precision #(of course values could/should? be changed) ConvertXYZ_Reinhard_HDRtoSDR(exposure_X=14.0, contrast_X=0.5, exposure_Y=14.0, contrast_Y=0.5, exposure_Z=14.0, contrast_Z=0.5) #From XYZ back to YUV 4:4:4 with 16bit precision ConvertXYZtoYUV(pColor=0) #Converting back to 4:2:0 with 16bit precision Converttoyuv420(interlaced=false, matrix="Rec.709") #Dithering to 8bit with the Floyd-Steinberg error diffusion ConvertBits(bits=8, dither=1) #Clipping Limiter(min_luma=16, max_luma=235, min_chroma=16, max_chroma=240)

Script 1B:

Code:

#Indexing FFVideoSource("any_HDR_video.mkv") #From 10bit to 16bit ConvertBits(16) #Reverse upscale to FULL HD with 16bit precision #(optional) #DeBilinearResizeMT(1920, 1080) #From YUV to XYZ with 16bit precision ConvertYUVtoXYZ(Color=0, OutputMode=1, HDRMode=0, fullrange=false) #Tone-mapping with 16bit precision #(of course values could/should? be changed) ConvertXYZ_Reinhard_HDRtoSDR(exposure_X=14.0, contrast_X=0.5, exposure_Y=14.0, contrast_Y=0.5, exposure_Z=14.0, contrast_Z=0.5) #From XYZ back to YUV 4:4:4 with 16bit precision ConvertXYZtoYUV(pColor=0) #Converting back to 4:2:0 Converttoyv12(matrix="PC709") #From 16bit to 8bit ConvertTo8bit #Clipping (needed?) Limiter(min_luma=16, max_luma=235, min_chroma=16, max_chroma=240)

Script 2:

Code:

FFVideoSource("any_HDR_video.mkv") z_ConvertFormat(pixel_type="RGBPS",colorspace_op="2020ncl:st2084:2020:l=>rgb:linear:2020:l", dither_type="none") DGHable # you can always play with the exposure: # DGHable(exposure=1.0) # (replace 1.0 with your own value) # Reinhard could also be used: # DGReinhard z_ConvertFormat(pixel_type="YV12",colorspace_op="rgb:linear:2020:l=>709:709:709:l",dither_type="ordered")