OBS-Studio/C2/Audio-and-Output-settings-in-OBS/English

Title: Audio and Output settings

Author: Nikita Misal

Visual Cue	Narration
Slide: Title	Welcome to the spoken tutorial on Audio and Output settings.
Slide: Learning Objectives	In this tutorial, we will learn to configure: Video settings Output settings and Audio settings.
Slide: OS and Versions	OBS Studio can run on any of the following operating systems: Microsoft Windows 8 or higher versions GNU/Linux OS 18.04 or higher and Mac OS X 10.13 or higher versions.
Slide:	This tutorial is recorded using Windows 10 OBS version 27.0.1 and Firefox web browser. You can use any web browser of your choice.
Slide: High Quality videos	In order to produce high-quality videos, it is important to understand: How video resolution matches to canvas aspect ratio and How to avoid resampling audio tracks.
Slide: What is Video resolution	Video resolution is the image size visible to the viewer. Its width and height in pixels is called 'Video Resolution'. Usually, a video plays in full resolution on the screen. It is wise to make videos compatible with common video players. For eg:VLC Player.
Slide: What is Audio Sample rate	What is Audio Sample rate? Each sound stream consists of a number of digit samples flow. That number must exceed at least twice the highest frequency of the sound stream. Human ears can recognize frequencies upto 20000 Hz. Hence, the most common audio sample rates are 44100 Hz and 48000 Hz.
Only Narration	Now let us learn how to set video resolution for our recording. I have already opened the OBS studio interface in my system. Please do so on your system.
Click on the Settings button. Point towards the Settings dialog box.	At the bottom right, click on the Settings button. The Settings dialog box pops up.
Click on the Video tab. Hover over each option as per the narration.	On the left side panel, click on the Video tab. Under the Video tab on the right side, 4 options are displayed.
Slide: Video Options	Base (Canvas) Resolution defines the Canvas preview aspect ratio and Canvas size. Output (Scaled) Resolution defines the main Output resolution. Downscale Filter specifies the filters used in scale operations. This filter changes how OBS shrinks the video. It decides what details are to be kept and which to discard in the video. Common FPS Values specifies sets of frame rates (fps). It is the rate at which OBS Studio will render its output.
Click on the drop down next to Base (Canvas) Resolution. Select 1920 x 1080	Now on the OBS interface, click on the drop-down next to Base (Canvas) Resolution. Resolution options are displayed. I will select 1920 x 1080.
Type, 1920 x 1080	Next, we will change the value of our Output (Scaled) Resolution. We want our output to be the same size as the Canvas resolution. So, I will type 1920 x 1080 here.
Click on the drop down next to Downscale Filter >> select Bilinear. Select 30fps	Click on the drop-down next to Downscale Filter and select Bilinear. Under Common FPS Values, I will select 30fps.
Click on the Apply button >> click on the OK button.	Click on the Apply button and then on the OK button at the bottom of the window.
Controls >> Start Recording button.	Under the Controls panel on the right, click on the Start Recording button. Minimize the screen and record any other window of your choice.
Open Firefox web browser >> Spoken Tutorial website.	I am recording my Firefox web browser screen. I will briefly record the Spoken Tutorial website.
Click on the Stop Recording button.	After recording is done, switch back to the OBS window. And click on the Stop Recording button.
Click on File Click on Show Recordings.	To locate the recording, click on the File menu on the top left of the OBS interface. Click on Show Recordings.
Right-click on it >> Open with option. Select VLC player	To view the recording, first right-click on it and from the context menu, select Open with option. From the sub-menu, select any Player available on your system. I will select VLC player.
Only narration	Notice that the video is not very clear even in 1920 x 1080 resolution. The Downscale Filter has degraded the output quality. This is done in order to render the video quickly.
Switch to OBS >> click on Settings Point towards settings dialog box.	Go back to the OBS window. At the bottom right under Controls, click on the Settings button. The Settings dialog box pops up.
Click on the Video tab. Under Downscale Filter select Lanczos.	On the left panel, click on the Video tab. Under Downscale Filter, select Lanczos.
Click on the Apply button >> click on the OK button.	Click on the Apply button and then on the OK button at the bottom of the dialog box.
Controls>>Start Recording button.	Under the Controls panel on the right side, click on the Start Recording button.
Open Firefox web browser >> Spoken Tutorial website.	Now, go to the same screen as we did earlier. Here, I have already opened the Spoken tutorial website.
Click on the Stop Recording button.	After recording is done, switch back to the OBS window. And click on the Stop Recording button.
Click on File >> Click on Show Recordings Right-click on it >> Open with option >> Select VLC.	At the top left, click on the File menu and select Show Recordings. Play the video as demonstrated earlier.
Point towards the video.	Notice, the quality of the video has changed and the file size has increased.
Point towards Downscale filter option.	Depending on the video quality and file size we can adjust the Downscale filter option. Downscale filter can be adjusted according to: Video quality File size
Only narration	Next, let’s learn about Audio properties in OBS.
Switch to OBS >> click on Settings. Point towards settings dialog box.	Go back to the OBS window. At the bottom right under Controls, click on the Settings button. The Settings dialog box pops up.
Click on the Audio tab. Select 44.1khz and Stereo Point towards Global Audio Devices by default Desktop Audio.	On the left panel, click on the Audio tab. Under the General section, let’s use Sample rate of 44.1 kHz and Channels as Stereo. In my case under Global Audio Devices by default Desktop Audio is set to Default. It may vary depending on your system settings.
Point towards Mic/Auxiliary Audio	Mic/Auxiliary Audio is set to Default and everything else is Disabled.
Click on the Apply button>> click on the OK button.	Click on the OK button.
Point towards the Restart OBS dialog box. Click on the Yes button.	The Restart OBS dialog box pops up. Here, click on the Yes button.
Slide OBS does not restart	If OBS doesn’t restart correctly, the “OBS is already running” dialog box appears. Here, click on the Launch anyway button.
	We see that the OBS window restarts with our new configuration.
Only narration	Next, let's learn to add filters to our Audio.
Select Scene 002. Sources panel select the Arvind’s external mic.	Select Scene 002. In the Sources panel, select Arvind’s external mic.
Audio mixer panel, the Device option is set to Default. Select Microphone (Realtek High Definition Audio).	Above the Audio mixer panel, the Device option is set to Default. Click on the drop-down next to Default. Then select Microphone (Realtek High Definition Audio).
Point towards thenew Audio track.	It may vary depending on your system settings and the headset you are using. Note: If no Audio is detected, check your system settings and add an audio input.
Click onStart recording button.	Now click on the Start recording button at the bottom right. I will narrate the following sentences “Welcome to the spoken tutorial on Audio and Output settings. In this tutorial, we will learn: Video settings Output Settings Audio settings.
Click on the Stop recording button.	Click on the Stop recording button.
Click onFile >> Show recordings.	Then click on the File menu at the top left of the OBS interface. Click on Show Recordings.
Right click on it >> Open with option >> Select VLC	Play the video as demonstrated earlier.
Point towards the audio	Notice that the audio has disturbance in it. We will remove this by adding some filters to our audio.
Click the gear icon next to the volume button. >>Select Filters	In the Audio Mixer window, click the gear icon next to the volume button. From the context menu, select Filters.
Point towards Audio Input Capture	Filters for ‘Arvind’s external mic’ window appears.
Left side >> click the + button >> Select the Noise suppression filter.	To add a filter, click the + plus button on the left side of the window. Let us select the Noise suppression filter.
Point towards Filter name click on the OK button.	A dialog box saying “Filter Name” appears. I will keep the name as it is and click on the OK button.
Right side >> click on Method drop-down >> select RNNoise	On the right side, click on the drop-down next to the Method option. Here, we will select RNNoise.
Click on the + button >> Select the Compressor filter	Then again click on the + plus button on the left side and select the Compressor filter.
Point towards Filter Name Click on the OK button.	A dialog box saying “Filter Name” appears. I will keep the name as it is and click on the OK button.
Hover over each option.	Here we see different options with adjusting levels. We will keep them as they are.
Click on the Close button.	And click on the Close button at the bottom of the window.
Click on Start recording button >> Narrate.	Now click on the Start recording button. I will again narrate the same sentences as earlier.
Stop recording >> File >>Show recordings Right-click on it >> Open with option >> Select VLC player	Then click on the Stop recording button. And play the recording as demonstrated earlier.
	Notice the difference in the audio.
Only narration	This brings us to the end of this tutorial. Let us summarize.
Slide: Summary	In this tutorial, we learnt how to configure: Video settings Output settings and Audio settings.
Slide: Assignment	As an assignment Try different Base (Canvas) Resolution and Output (Scaled) Resolution settings. Use the Downscale filter and note the difference in the quality of the output. Add other Noise filters to your audio and make a note of the difference.
Slide: About Spoken Tutorial Project	The video at the following link summarises the Spoken Tutorial project. Please download and watch it.
Slide: Spoken tutorial workshops	We conduct workshops using spoken tutorials and give certificates. For more details, please contact us.
Slide: Answers for THIS Spoken Tutorial	Pls post your timed queries in this forum.
Slide: Acknowledgement	Spoken Tutorial project is funded by the Ministry of Education (MoE), Govt. of India.
	This is Arvind Pillai along with Nikita Misal from IIT Bombay signing off. Thank you for joining.

Contributors and Content Editors

Arvindpillai90, Nancyvarkey, PoojaMoolya