Why video become darker after convert to DNxHD (DNxHR)?

Hi all!
Why is the video becomes darker (more contrast) after conversion of h264/265 in DNxHD/DNxHR?

5e294b589f759374815640.jpeg

Convert using ffmpeg:
ffmpeg -i in.mov -c:v dnxhd -profile:v dnxhr_hqx -vf "scale=in_range=pc" out.mov

Tried different combinations in/out_range. The output video is always different.

ORIGINAL MediaInfo
General
Format : MPEG-4
Format profile : QuickTime
Codec ID : qt 0000.02 (qt )
File size : 124 MiB
Duration : 10 s 40 ms
Overall bit rate : 103 Mb/s

Video
ID : 1
Format : HEVC
Format/Info : High Efficiency Video Coding
Format profile : Main 10@L5.1@High
Codec ID : hvc1
Codec ID/Info : High Efficiency Video Coding
Duration : 10 s 40 ms
Bit rate : 101 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 10 bits
Bits/(Pixel*Frame) : 0.487
Stream size : 121 MiB (98%)
Language : English
Color range : Full
Color primaries : BT.709
Transfer characteristics : BT.601
Matrix coefficients : BT.601
Codec configuration box : hvcC

DNxHR MediaInfo
General
Format : MPEG-4
Commercial name : DNxHR HQX
Format profile : QuickTime
Codec ID : qt 0000.02 (qt )
File size : 873 MiB
Duration : 10 s 40 ms
Overall bit rate mode : Constant
Overall bit rate : 730 Mb/s
Writing application : Lavf58.29.100

Video
ID : 1
Format : VC-3
Commercial name : DNxHR HQX
Format version : Version 3
Format profile : RI@HQX
Codec ID : AVdh
Codec ID/Info : Avid DNxHR
Duration : 10 s 40 ms
Bit rate mode : Constant
Bit rate : 728 Mb/s
Width : 3 840 pixels
Height : 2 160 pixels
Display aspect ratio : 16:9
Frame rate mode : Constant
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:2
Bit depth : 10 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 3.512
Stream size : 872 MiB (100%)
Language : English
April 4th 20 at 13:27
1 answer
April 4th 20 at 13:29
Color primaries : BT.709
Transfer characteristics : BT.601
Matrix coefficients : BT.601
Probably you need to not only put in_range, but also all the characteristics and coefficients.
See: color_range=, color_space=, color_transfer=, color_primaries=
You can read in particular this article, with the telling title "Hell Color: Ffmpeg Transcoding and Preserving BT.601"
In addition, you have 4:2:0 into 4:2:2 - this also does not add precision to the colors.

For what purpose are converting?
@ambrose Thank you! I will deal with the conversion parameters.
Convert for further editing. - andre.Kozey commented on April 4th 20 at 13:32

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