March 2021 FredLUG presentation.

1. March 27th, 2021
OBS for FREDLUG
1
Open Broadcast Studio
OBS by Peter Larsen for FredLUG 2021

2. 2 OBS for FREDLUG March 27th, 2021
What will we cover today
 Introduction
 What does OBS offer and why
should you care
 The world of streaming media
 OBS overview –
demo/walkthrough
 How to setup a live broadcast
on YouTube from OBS
 Other tools you may need

3. 3 OBS for FREDLUG March 27th, 2021
Introduction
 Peter Larsen, peter@peterlarsen.org
Twitter: @egoalter
 Domain Architect with Red Hat
Spend a lot of time talking/showing technology but not about
OBS
 Electronics hobbyist – like to learn and teach what I know
about analog, digital, MCU and embedded controllers
 Not a graphics designer, artist or expert in that field.
But I did stay at a Holiday Inn .....
 I'm colorblind – my interpretation of colors is just as valid as
yours, even if we don't agree!

4. 4 OBS for FREDLUG March 27th, 2021
Introduction - Why do this?
 Participating in and creating online meetings
 Used OBS to broadcast LUG meetings live
 Used OBS to create interesting and integrated backgrounds for
live broadcasts
 Simple mixer – high quality videos

5. 5 OBS for FREDLUG March 27th, 2021
A word of warning!
 Video streaming is demanding of GPU/CPU/Memory
 If you plan to store video, you'll need 100+GB of space – if
you record a lot, you need a LOT mroe
 Video editing requires even more space
 You 10 year old PC will have issues!

6. 6 OBS for FREDLUG March 27th, 2021
Do I need high end GPUs?
 No, but they help
 Have at least 4 cores; I'll recommend no less than 8 cores.
 The slower the CPU/GPU:
 Less resolution
 Busy system that can disable OBS on the same box!

7. 7 OBS for FREDLUG March 27th, 2021
Where to get OBS?
 sudo dnf install obs-studio
 Additional modules/plugins may need to be installed like NDI
 It's that easy (there's even an apt-get for it)
 AppImage exists too
 Speak up if your distro has OBS!

8. 8 OBS for FREDLUG March 27th, 2021
What does OBS offer and why should you care
 Make a professional background for your work meetings
 Easy screen-cast when the conference software doesn't offer
enough features
 Full high-definition web-casts of games and demos
 Automatic video interaction/animation

9. 9 OBS for FREDLUG March 27th, 2021
The world of streaming media
 Online meetings
 Gaming broadcasts
 YouTubers, Odysee, Twitch .....
 Live streaming – the new fact of life
 Raw feed with effects

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Streaming
 BIG topic – best for a separate meeting
 Lots of technologies and services available
 We'll concentrate on how to generate a feed for a “random”
streaming service
 Not focused on promoting and tools to distribute and maintain
streaming content, setting up metadata etc.

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OBS overview
 Scenes
 Objects
 Audio Mixer
 Transitions
 Controls
 Studio Mode
 Streaming
 Recording / Buffer
 Virtual Camera
 Profiles
 Filters

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Scenes
 A collection of sources and position of sources
 Allows transitions from one scene to another
 Focus on face vs. focus on screen share vs. other events.
 Properly prepared, making live changes is a simple button
push
 Great in studio mode!

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Objects
 Everything that OBS can do is here!
 Audio sources, Video sources, Colors, Text,
Screen capture, Scenes-in-Scenes, Browser
source
 Lots of options – we'll look at some of them
 Objects are placed in scenes. Objects can be
shared between scenes (settings etc)

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Audio Mixer
 Audio sources from:
 Microphones
 Videos
 Audio Jacks
 Determine volume/db mix of sources
 Apply audio filters to sources

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Filters
 Audio Filters
 Compression, Noise Gates/Suppression, Delay, Gain etc
 Video Filters
 LUT, Chroma (greenscreen), Color filters, crop/pad, masks,
scale/aspect, scroll, sharpen etc.

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Transitions
 From scene to scene
 Cut, Swipe, Slides
 Custom wipes using LUMA
Wipes
 Black to white filter
 Lots of existing templates

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Controls
 Streaming
 Recording
 Virtual Camera enable
 v4l2loopback
 Studio Mode
 Settings

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Studio Mode
 My typical work-mode
 Easy transition control
 Prepare preview before
showing it

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Let's DEMO
 Time to see the real thing

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Advanced Animation/automation
 Long awaited feature on Linux “Web Page” object
 Found it in Fedora 34
 Lots of collections like:
 https://ecard.enter-media.org/uvcslider/
 https://streamdps.com/widgets/rendered-animations/
 Or create your own local web-page with JS/CSS
 Overlay
 Animation
 Automated responses – chat logs, new subscribers etc.
 Marketing messages in stream

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How to setup a live broadcast on YouTube from OBS
 OBS supports more than 50 streaming platforms
 In most cases, get your streaming key from platform of choice
is all you need!
 Use profiles if you have more than one streaming destination!

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Bitrate
Video Bitrate Audio Bitrate Resolution
1080P 6,000 Kbps 128Kbps 1920x1080
720P 3,000 Kbps 128Kbps 1280x720
480P 1,000 Kbps 128Kbps 854x480
360P 600 Kbps 96Kbps 640x360
240P 300 Kbps 96 Kbps 426x240
Source: https://streamshark.io

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Other tools you may need
 The GIMP – of course
 Pitivi (Video Editing)
 Video 4 Linux (v4l) manipulation of video sources
 Also includes the loopback to broadcast the output of OBS as a camera
 Blender – great video features, effects etc.
 ffmpeg

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Thank you for listening!
 Questions?
 Comments?
 We need speakers!
 If you've found a cool FOSS project, come talk about it!
 If you learned how to do something that saves you a bunch of time, come talk about
it!
 Tell us how you used Linux to run software that helped you conquer the world