performance impact and precision of colour formats

[rockbottom]

I noticed in Task Manager/GPU-Z that the encoder utilization stays exactly the same @ 30 or 60FPS. It doesn't increase at all, almost like the 60FPS setting is being ignored.

 

[tari3x]

As someone pointed out on github, this is likely relevant:
GPU conversion not available for format: 7

Add this seems like a step towards resolving it:

ARGB texture encoding support by openglfreak · Pull Request #5706 · obsproject/obs-studio

Description Makes it possible to directly encode ARGB textures. So far it was only possible to encode NV12 textures, but NVENC and Quick Sync Video also support ARGB textures as input. This was spl...

github.com

Op, set the scaling of your monitors @ 100%, both are @ 150.

Yeah, I did try setting it to 100% but that changed nothing. Same about HAGS.

 

[tari3x]

I noticed in Task Manager/GPU-Z that the encoder utilization stays exactly the same @ 30 or 60FPS. It doesn't increase at all, almost like the 60FPS setting is being ignored.

Eew. I'm away from the machine for a couple of weeks, but will try to check this when back.

 

[rockbottom]

Eew. I'm away from the machine for a couple of weeks, but will try to check this when back.

When you run your test, watch the CPU utilization too. On my system, only 2 Performance cores are being used. At 30 FPS no problem, those cores are well below 100% utilized & all runs great. 60FPS pushes them to the limit. Too many cores are sitting idle doing nothing.

 

[rockbottom]

T, give it another try with v30. I updated last night & have been testing for over 6 hours. It's been fixed, you should be able to encode @ 60FPS with absolutely no issues.

 

[tari3x]

Not fixed for me, sadly. 4K@60hz with BGRA still "encoding overloaded" and garbage output.

 

[rockbottom]

I was recording using the Custom Output yesterday. No lag today either. If you would rather continue to use use the Standard Output, I tested 1440p & 1080p, both are good to go @ 60FPS.

 

[rockbottom]

I think the Lossless settings in the Standard Output might be causing the encoding lag @ 2160p. Preset P7 is too high, it should be in the P3-P5 range.

If you try the Custom Output just add preset=lossless to Video Encoder Settings (if any)

From my logs, encoding 1440p & 1728p with the Standard Output.

00:48:31.955: video settings reset:
00:48:31.955: base resolution: 3840x2160
00:48:31.955: output resolution: 2560x1440
00:48:31.955: downscale filter: Bicubic
00:48:31.955: fps: 60/1
00:48:31.955: format: BGRA
00:48:31.955: YUV mode: None
00:48:31.955: GPU conversion not available for format: 7
00:48:31.955: NV12 texture support not available
00:48:31.969: Settings changed (video)
00:48:31.969: ------------------------------------------------
00:48:49.524: Settings changed (outputs)
00:48:49.524: ------------------------------------------------
00:48:51.965: User switched to scene 'TRI-East 1'
00:49:02.202: [obs-nvenc] nv12/p010 not active, falling back to ffmpeg
00:49:02.202: ---------------------------------
00:49:02.203: [FFmpeg NVENC encoder: 'advanced_video_recording'] settings:
00:49:02.203: encoder: NVIDIA NVENC HEVC (FFmpeg)
00:49:02.203: rate_control: lossless
00:49:02.203: bitrate: 0
00:49:02.203: cqp: 0
00:49:02.203: keyint: 60
00:49:02.203: preset: p7
00:49:02.203: tuning: hq
00:49:02.203: multipass: disabled
00:49:02.203: profile: main
00:49:02.203: width: 2560
00:49:02.203: height: 1440
00:49:02.203: b-frames: 0
00:49:02.203: psycho-aq: 0
00:49:02.203: GPU: 0
00:49:02.203:
00:49:02.358: ---------------------------------
00:49:02.358: [FFmpeg pcm_s24le encoder: 'Track1'] bitrate: 0, channels: 6, channel_layout: 5.1
00:49:02.358:
00:49:02.362: ==== Recording Start ===============================================
00:49:02.362: [ffmpeg muxer: 'adv_file_output'] Writing file 'D:/2023-11-21_00-49-02.mov'...
00:58:04.803: [ffmpeg muxer: 'adv_file_output'] Output of file 'D:/2023-11-21_00-49-02.mov' stopped
00:58:04.803: Output 'adv_file_output': stopping
00:58:04.803: Output 'adv_file_output': Total frames output: 32542
00:58:04.803: Output 'adv_file_output': Total drawn frames: 32546
00:58:04.804: ==== Recording Stop ================================================


01:33:09.696: [obs-nvenc] nv12/p010 not active, falling back to ffmpeg
01:33:09.696: ---------------------------------
01:33:09.696: [FFmpeg NVENC encoder: 'advanced_video_recording'] settings:
01:33:09.696: encoder: NVIDIA NVENC HEVC (FFmpeg)
01:33:09.696: rate_control: lossless
01:33:09.696: bitrate: 0
01:33:09.696: cqp: 0
01:33:09.696: keyint: 60
01:33:09.696: preset: p7
01:33:09.696: tuning: hq
01:33:09.696: multipass: disabled
01:33:09.696: profile: main
01:33:09.696: width: 3072
01:33:09.696: height: 1728
01:33:09.696: b-frames: 0
01:33:09.696: psycho-aq: 0
01:33:09.696: GPU: 0
01:33:09.696:
01:33:09.862: ---------------------------------
01:33:09.862: [FFmpeg pcm_s24le encoder: 'Track1'] bitrate: 0, channels: 6, channel_layout: 5.1
01:33:09.862:
01:33:09.867: ==== Recording Start ===============================================
01:33:09.867: [ffmpeg muxer: 'adv_file_output'] Writing file 'D:/2023-11-21_01-33-09.mov'...
01:35:11.869: [ffmpeg muxer: 'adv_file_output'] Output of file 'D:/2023-11-21_01-33-09.mov' stopped
01:35:11.869: Output 'adv_file_output': stopping
01:35:11.869: Output 'adv_file_output': Total frames output: 7316
01:35:11.869: Output 'adv_file_output': Total drawn frames: 7320
01:35:11.869: ==== Recording Stop ================================================