OBS cannot encode greater then 8-bit

[rockbottom]

Interesting, using the Standard Output, no dice.

General​
Unique ID :	214823036276540152674324951467791938575 (0xA19D696DC041C4DCB229487F0742F40F)
Complete name :	D:\2025-09-10_12-45-02.mkv
Format :	Matroska
Format version :	Version 4
File size :	3.81 MiB
Duration :	3 s 754 ms
Overall bit rate :	8 508 kb/s
Frame rate :	60.000 FPS
Writing application :	Lavf61.1.100
Writing library :	Lavf61.1.100
ErrorDetectionType :	Per level 1

Video​
ID :	1
Format :	HEVC
Format/Info :	High Efficiency Video Coding
Format profile :	Main 10@L4.1@Main
Codec ID :	V_MPEGH/ISO/HEVC
Duration :	3 s 750 ms
Bit rate :	6 035 kb/s
Width :	1 920 pixels
Height :	1 080 pixels
Display aspect ratio :	16:9
Frame rate mode :	Constant
Frame rate :	60.000 FPS
Color space :	YUV
Chroma subsampling :	4:2:0
Bit depth :	8 bits
Bits/(Pixel*Frame) :	0.049
Stream size :	2.70 MiB (71%)
Default :	No
Forced :	No
Color range :	Limited
Color primaries :	BT.709
Transfer characteristics :	BT.709
Matrix coefficients :	BT.709

Audio​
ID :	2
Format :	PCM
Format settings :	Little / Signed
Codec ID :	A_PCM/INT/LIT
Duration :	3 s 754 ms
Bit rate mode :	Constant
Bit rate :	2 304 kb/s
Channel(s) :	2 channels
Sampling rate :	48.0 kHz
Bit depth :	24 bits
Stream size :	1.03 MiB (27%)
Title :	Track1
Default :	No
Forced :	No

 

[rockbottom]

Video Encoder settings I was using in the Custom Output. The input/output bit-depth options did not work.

rgb_mode=yuv444 inputbitdepth=8 outputbitdepth=10 preset=p6 tune=hq profile=1 level=5.0 tier=high rc=constqp qp=15 rc-lookahead=0 bf=0 b_ref_mode=0 multipass=qres

12:12:58.127: ------------------------------------------------
12:13:00.403: Failed to set inputbitdepth=8
12:13:00.403: Failed to set outputbitdepth=10
12:13:00.544: signal_handler_connect: signal 'file_changed' not found
12:13:00.546: ==== Recording Start ===============================================
12:13:03.513: Output 'adv_ffmpeg_output': stopping
12:13:03.513: Output 'adv_ffmpeg_output': Total frames output: 177
12:13:03.513: Output 'adv_ffmpeg_output': Total drawn frames: 187
12:13:03.514: ==== Recording Stop ================================================

 

[rockbottom]

ffmpeg -h encoder=hevc_nvenc

ffmpeg -h encoder=hevc_nvenc. GitHub Gist: instantly share code, notes, and snippets.

gist.github.com

 

[rockbottom]

Back to the custom out. Color Space is now set to Rec. 2100 (PQ) & Color Range is Full.

General​
Complete name :	D:\2025-09-10_13-00-56.mov
Format :	MPEG-4
Format profile :	QuickTime
Codec ID :	qt 0000.02 (qt )
File size :	10.8 MiB
Duration :	5 s 78 ms
Overall bit rate :	17.9 Mb/s
Frame rate :	60.000 FPS
Writing application :	Lavf61.1.100

Video​
ID :	1
Format :	HEVC
Format/Info :	High Efficiency Video Coding
Format profile :	Format Range@L5@High
HDR format :	SMPTE ST 2086, HDR10 compatible
Codec ID :	hev1
Codec ID/Info :	High Efficiency Video Coding
Duration :	5 s 67 ms
Bit rate :	15.6 Mb/s
Width :	1 920 pixels
Height :	1 080 pixels
Display aspect ratio :	16:9
Frame rate mode :	Constant
Frame rate :	60.000 FPS
Color space :	YUV
Chroma subsampling :	4:4:4
Bit depth :	10 bits
Bits/(Pixel*Frame) :	0.125
Stream size :	9.42 MiB (87%)
Color range :	Full
Color primaries :	BT.2020
Transfer characteristics :	PQ
Matrix coefficients :	BT.2020 non-constant
Mastering display color primaries :	Display P3
Mastering display luminance :	min: 0.0000 cd/m2, max: 1003 cd/m2
Maximum Content Light Level :	1003 cd/m2
Maximum Frame-Average Light Level :	1003 cd/m2
Codec configuration box :	hvcC

Audio​
ID :	2
Format :	PCM
Format settings :	Little / Signed
Codec ID :	in24
Duration :	5 s 78 ms
Bit rate mode :	Constant
Bit rate :	2 304 kb/s
Channel(s) :	2 channels
Channel layout :	L R
Sampling rate :	48.0 kHz
Bit depth :	24 bits
Stream size :	1.39 MiB (13%)
Default :	Yes
Alternate group :	1

 

[PaiSand]

Notice that you used MKV container on the simple output and MOV on the advanced output.
Perhaps a limitation of the container or how the encoder works for this containers?

 

[rockbottom]

Already tested both containers with the same result.

It seems to work A-OK in the Custom Out but not in Standard.

When I switched the Color Space to Rec. 2100 (PQ), the encoder throws the errors Pete mentioned in his first post when in Standard only.

 

[lizardpeter]

Can we get a developer to comment on this? If it's already working with custom output, I don't see why it would be too much effort to enable it (or fix it?) in the standard/advanced output.

 

[rockbottom]

Lazy

Anyway, I only tested that it worked. Further testing needs to be done. I did not bother to check color retention or accuracy. I figured you could do it while you're trying to get it to work on your side.