HLG to rec.709 this source drone, proper transcoding

[marcorocchini]

Hi, patience with the cat. Thanks



Please download my drone footage:

https://www.swisstransfer.com/d/0fccfac9-fad7-4b63-a8b7-210789c70960

Normal.MP4
HLG.MP4
DLOGM.MP4

they are the same scene, recorded with normal mode, hlg and dlogM

for the HLG.mp4 (it's arib-std-b67) I try

Import("v:\avisynth\plugins\IResize.avsi")
Import("V:\AviSynth\plugins\smoothFPS2.avsi")
Import("V:\AviSynth\plugins\smoothFPS3.avsi")
Import("v:\AviSynth\plugins\CropResizedic2017.avsi")
Import("V:\AviSynth\FrameRateConverter2021\FrameRateConverter.avsi")
Import("V:\AviSynth\LinearTransformation-3.0\LinearTransformation.avsi")
LoadPlugin("V:\AviSynth\LinearTransformation-3.0\vscube.dll")
LoadPlugin("v:\AviSynth\FrameRateConverter2021\X64\FrameRateConverter.dll")
LoadPlugin("v:\AviSynth\ffms2-2.40-msvc\ffms2-2.40-msvc\x64\ffms2.dll")
Import("V:\AviSynth\FFMS2_AVSI_2019\ffms2.avsi")
LoadPlugin("v:\AviSynth\LSMASH_AGO_2023\x64\LSMASHSource.dll")
LoadCPlugin("v:\avisynth\plugins64\yadif.dll") 
LoadPlugin("V:\AviSynth\MaskTool2\X64\masktools2.dll") 
LoadPlugin("V:\AviSynth\Santiag\ResampleMT.dll") 
LoadPlugin("V:\AviSynth\Santiag\nnedi3.dll") 
LoadPlugin("V:\AviSynth\Santiag\aWarpsharpMT.dll") 
LoadPlugin("V:\AviSynth\Santiag\eedi3.dll") 
LoadPlugin("V:\AviSynth\Santiag\EEDI2.dll") 
LoadPlugin("V:\AviSynth\Santiag\GScript_26_64.dll") 
LoadPlugin("V:\AviSynth\Santiag\SangNom2.dll") 
Import("V:\AviSynth\Santiag\santiag.avsi")
Import("V:\AviSynth\QTGMC2025\QTGMC.avsi")
Import("V:\AviSynth\QTGMC2025\Zs_RF_Shared.avsi")
LoadPlugin("V:\AviSynth\QTGMC2025\mvtools2.dll")
LoadPlugin("V:\AviSynth\QTGMC2025\RgTools.dll")
LoadPlugin("v:\AviSynth\BestSource\BestSource.dll") 
LoadPlugin("V:\AviSynth\RIFE\RIFE.dll")
LoadPlugin("V:\AviSynth\RIFE\avsresize.dll")
LoadPlugin("V:\AviSynth\RIFE\PlanarTools.dll")
vid=FFMS2("W:\tuttiFormati\drone\HLG.MP4")
aud=LWLibavAudioSource("v:\system\empty.wav",stream_index=0)
left=GetChannel(aud, 1)
right=GetChannel(aud, 2)
both=mergechannels(left, right)
audiodub(vid, both)
ConvertAudioTo16Bit()


z_ConvertFormat(pixel_type="YUV422P8", colorspace_op="709:auto:auto:limited=>709:same:same:limited", interlaced=false)

emask = mt_convolution(vertical="-1 2 -1").ColorYUV(off_y=-64).ColorYUV(gain_y=128).mt_expand(chroma="-128").Blur(0.8)
Overlay(last, Blur(0.6, 0.7), mask=emask)

Convertbits(8).ConvertToYUY2(interlaced=false)
assumeFPS(50)
Prefetch(8)

but I think I need a LUT and apply a lut, what lut, where I can download it or how I can do?

I wonder if does exist a function like a "color conform" that automatically do all

[ProWo]

You can use the HLG_A_to_LinearBT709.cube from FranceBB's LUT collection.
https://github.com/FranceBB/LinearTransformation

[marcorocchini]

FFMS2("W:\tuttiFormati\drone\HLG.MP4")
Convertbits(8)

LinearTransformation(Input="BT2020_HLG", Output="Linear_BT709")

z_ConvertFormat(pixel_type="YUV422P8", colorspace_op="709:auto:auto:limited=>709:same:same:limited", interlaced=false)

emask = mt_convolution(vertical="-1 2 -1").ColorYUV(off_y=-64).ColorYUV(gain_y=128).mt_expand(chroma="-128").Blur(0.8)
Overlay(last, Blur(0.6, 0.7), mask=emask)
Convertbits(8).ConvertToYUY2(interlaced=false)
assumeFPS(50)
Prefetch(8)

do you mean:
LinearTransformation(Input="BT2020_HLG", Output="Linear_BT709") ?

but output seems to me a little flat, or I mistake.

Can I do in avisynth with HDRTools?

or I have try

FFMS2("W:\tuttiFormati\drone\HLG.MP4")

Convertbits(8)
#PackedToPlanar()



LoadPlugin("C:\HDRTools.dll")

z_ConvertFormat(pixel_type="RGBPS") 
ConvertRGB_Reinhard_HDRtoSDR()


z_ConvertFormat(pixel_type="YUV422P8")

but maybe need level correction

[ProWo]

Search for francebb in
https://forum.doom9.se/
for the correct use in avisynth

[marcorocchini]

I try but seems that doom9 forum is not working at the moment

however I found this commandline that produce an output "similar" to the normal source, or closer to the "normal"

v:\FFMPEG_AGO2025\ffmpeg.exe -y -i "W:\hlg.MP4" -vf zscale=t=linear:npl=120,format=gbrpf32le,zscale=p=bt709,tonemap=hable:desat=0,zscale=t=bt709:m=bt709:r=pc,format=yuv422p -c:v libx264 -crf 18 -preset medium -tune fastdecode v:\videoOutputPClevelsHable.mp4

so I wonder, what to the same in avisynth?

[ProWo]

I try but seems that doom9 forum is not working at the moment

It works with my link above.