Open Broadcaster
- Open Broadcaster Software, now in version 30.2.3.
- Plugins
- Organizing Scenes
- obs-cmd
Audio Chain
Recorder Settings
Unfortunately, my only choice is:
- 44 kHz sampling rate
- 16 bit/sample
OBS Audio Filters
According to the-best-audio-filters-for-obs, order of the filters to use:
- Noise Suppression - I use
good quality, more CPU usageoption; - Noise Gate - disabled it;
- 3-band Equalizer - High: 0dB, Mid: 0dB, Low: +3dB;
- Compressor - Ratio: 5:1, Threshold: -12.2dB, Atack: 2ms, Release: 70ms, Output gain: 0dB
Codec
libfdk-AAC is better than FFmpeg AAC.
Video Chain
Camera Settings
Sony a7iv….
- in the USB streaming mode does not support Pictire Profiles, so my choice of PP11/S-Cinetone had no effect.
- Creative Mode - I use Standard.
More: What is S-Cinetone, and How Do You Use It?
OBS Video Filters
For webcam:
- disable low light enhancement - removes ghosting effects
For Sony a7iv I use:
- color correction filter - Saturation: -0.20
Codec
Guides:
- Recording in OBS
- Streaming in OBS with Intel QSV NVENC
- NVIDIA NvEnc
The order of preference is unclear and is determined by the PC capabilities:
- NVENC, preset=P6:Slower (Better Quality)
- QuickSync
- x264
- FFmpeg VAAPI
NVENC
My steamer GPU, GeForce GT 1030, does NOT support NVENC.
QuickSync
For my streamer/recorder PC with UHD Graphics 730, QuickSync uses GPU for H.264 encoding and CPU for HEVC, hence recommended is QuickSync H.264:
| GPU | UHD Graphics 730, 750, 770 |
|---|---|
| Rate Control | CBR |
| Target Usage | TU1 or TU2 |
| Profile | high |
| Latency | normal |
| B Frames | 3 |
x264
| Option | Lossless | Near Lossless | Indistinguishable | High Quality | Acceptable Quality |
|---|---|---|---|---|---|
| Rate Control | CRF | ||||
| CRF | 0 | 0…4 | 5…10 | 11…16 | 17…22 |
| Keyframe Interval | 1 | ||||
| x264 Options | bframes=0 keyint=1 min-keyint=1 | ||||
| OBS Color Format | 4:4:4 | 4:4:4 or 4:2:2 | 4:4:4, 4:2:2 or 4:2:0 |
Common:
| Option | Value |
|---|---|
| Preset | ultrafast - placebo, a slower preset only affects file size, quality should be unaffected. |
| Profile | High, required for 4:4:4 and 4:2:2 encoding |
| Tune | None, tuning can slightly improve compression efficiency, but often harms it instead. |
Screen Capture
Notes:
- OBS crashes when I power down my Sony a7iv when the latter is connected to PC using USB cable.