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You can also record live streaming video on Mac using built-in software like QuickTime Player. Although it is free, there are definitely better recording options around. QuickTime lets you easily capture microphone output, but it can’t record system audio on Macs that comes from the internet, online radio, movies, music videos, or other sources. Download Logitech Capture Video Recording & Streaming Software for Mac and PC Logitech Capture Video Recording & Streaming Software IE8/IE9/IE10 is no longer a supported browser.

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Learn how you can integrate ReplayKit into your Mac apps and games to easily share screen recordings or broadcast live audio and visuals online. We'll show you how to capture screen content, audio, and microphone input inside your Mac apps, and even broadcast your video to a live audience. For more on getting started with this framework in your app, be sure to see “Live Screen Broadcast with ReplayKit” and 'What's New with Screen Recording and Live Broadcast' from previous years.
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Hello and welcome to W.W.D.C.
Hello and welcome to the ReplayKit for macOS Session. My name is Johnny Trenh and I'm a software engineer on the ReplayKit team. Today I'm really excited to talk to you about ReplayKit on the mac platform as well as some new exciting features for all platforms. Got a lot to cover so let's get started.
Replay kit is a framework that gives you the ability to record or capture your application's screen audio and microphone content to a video that people can edit save and share. ReplayKit also gives you the ability to broadcast your application screen audio and microphone to other third party broadcast services to be viewed all over the world. ReplayKit originally launched for iOS in 2015 and in 2016 ReplayKit for tvOS was introduced. This year I'm pleased to announce ReplayKit is coming to the Mac. All the great features that are available to your iOS and tvOS applications will now be made available for your mac applications. You can now record capture and broadcast your mac application to everyone in the world. The main goal in bringing ReplayKit to the mac was to ensure that you have access to all the great features that we're already shipping with iOS and tvOS.
Along with the same HD quality low performance impact and built in privacy safeguards.
Now as you can imagine applications work quite differently on the mac when compared to iOS or tvOS. So let's take a look at the major ReplayKit features in the mac and I'll start with screen recording. Screen recording gives you the ability to record your application screen audio and microphone into a video that people can then edit save or share. How does screen recording work under the hood. Well let's take a look. Your application will call into RPSScreenRecorder to get the sharedRecorder singleton instance. With the shared instance you can start Recording at which point the Replay Kit will start to capture the screen audio and microphone samples from your application and start writing those samples into a movie file. When your application calls stopRecording replay kit saves the recording calls a preview and share extension and passes that information backup through RPPreviewViewController. You then present the preview view controller which allows people to edit save or share that movie file. Why don't we jump in and see how we can start in app recording in a project.
So here I want to talk a little bit about our project first. I'm here on our main story board. So the main story board we have three buttons that are going to indicate the different functionalities that we're going to express and build out throughout this demo. We're only going to focus on it start recording button right now that you see right here on our storyboard.
So this button is already hooked up to our code via IBOutlets and through the storyboard. What we're going to look at now is the IBAction for what happens when someone presses this button. So here in our code the IBAction is right here for recordButtonTapped button tapped. Now we're gonna do two different types of things with this button. Were actually going have the button pull double duty for us if we're actively recording. This button is going to stop recording if we're not actively recording. This button is going to start recording for us. So let's go ahead and take a look at what happens when we start recording. So here is our IBAction and we're going to look at the method start recording. Now it's very easy. The first thing you want to do is you want to go ahead and call RPScreenRecorder and get the sharedRecorder instance. From there we're gonna go ahead and call startRecording. After that this entire block is going to be executed right here.
So the first thing you want to do because we're gonna give back an error is you want to see if we have an error. Now if we don't have an error then we're properly recording and everything is started up just fine. So here we say that there's no error. All we're simply going to do is we're gonna go ahead and update our recordingState. Now what do we do when we update our recordingState. Actually what we do when we update our recordingState is we simply set the button to reflect that. Are we recording or not recording. Start or stop. And that's it. And we update our state. After that we are now up and recording. ReplayKit is now actually capturing everything and recording a video for you. So what happens when your user taps the button again.
Well here we're going to go ahead and call stopRecording. And let's take a look at how that works. Going down to the stopRecording method. Right here once again we're going to go ahead and get the sharedRecorded instance and then we're going to go ahead and call stopRecording. When we do that to completionHandler block is then executed. Now this looks a little bit complicated but I'll walk you through it because it's actually really simple.
The first thing when you do is check to see if we have an error if we don't have an error. Let's check to see if we have a previewViewController.
Now this is where it gets really interesting. But we want to do with the previewViewController is like we spoke about you want to display it so people can edit save or share their video. So we get the previewViewController.
We go ahead and save a reference to that here and then this is the important part.
You want to make sure that you are a delegate of the previewViewController. And I'll talk to you about why that's important just a little bit.
Then you want to go ahead and share the sheet. In this case I'm using main window and begin sheet. You can share the sheet or show the sheet however which way you choose using UIKit. But in this example we're gonna go ahead and use begin sheet and that's it. We're gonna go ahead and show the sheet.
We do some error checking here. And if there's errors we print them. If not then after that we go ahead and set the recordingState because we're no longer recording. So let's

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