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In this video, we will write a program which opens a computer webcam, and it shows the video of life,

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as you can see in here.

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So in addition, we also see a rectangle around the face of humans in the video.

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So let's do this in this video.

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So I'd like to start this program from the previous script, and I'm going to build upon this.

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So the previous program?

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Was able to open the computer webcam and to record the video.

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Using that webcam, but we didn't see the video live.

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We just got a final video file at the end in this program, we want to see what is being captured alive

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and the way you do that is by using a method called CV.

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To that, I am show a let me explain you where we put that methods.

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So here we create the video, we capture it from the webcam and we get the first frame and then we get

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behind the width.

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We create a face cascades a blueprint for detecting faces, and then we create an output file where

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the video will be stored when we close the program.

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And then we have this loop success as a Boolean.

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So it is true when the video is being captured from the webcam, we detect the faces from the frame,

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the current frame.

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So the frame we got sets from here.

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Then we go through all the phases and we draw a rectangle around each phase.

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Now at this point here we want to on indent, so be outside the full loop.

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But inside the one loop and see see two dots I show I am stands for image show.

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So we want to show the frame, the image on the screen.

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We want to give a label to the window.

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Recording should define.

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And then the second argument should be the actual image object.

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So the frame object you want to display on that window.

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After that, you want to apply the CV to that weight key methods and give an argument of one.

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This is basically specifying how long will you wait to display the next video?

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So this is one milliseconds and that is a safe value so we can keep it one.

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And that's it.

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We can run this code now and see what's going on here.

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So once I run, it's among your programs, you should see this icon that is the program that has the

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video.

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So this is life.

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Now you see the rectangle around my face, even though this is a very bad lighting.

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It's still working well.

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You know, you can stop this using this button.

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The Stop button, although there is a better way to stop the video from playing, using a more user

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friendly technique that is by after the key you apply if key is equal to.

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So you see this double assignment operator AWD Q So if the user presses the Q button on their keyboard,

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then you want to break the loop.

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So let's try this again.

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So here is the window.

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I press Q.

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It took one or two seconds, but the video stopped.

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So you should also see now that we have the output, that's Avio File here in my folder, I can open

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it with V L C.

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And you can see that the video is playing very fast, and we can fix that by changing the frame per

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second rate over the video.

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So what's happening here is that my webcam records video in 15 frames per second, but the video right

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here is configured to write 30 frames per second.

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So there is a mismatch between the frames you should try to find on your computer how many frames your

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webcam captures and then puts here that number of frames.

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So 15, in my case.

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So let me run this again.

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Yeah, here is the video.

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One, two three.

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Let's stop.

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Cue.

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So when you press Q, you should have the focus on the video player for Q to work.

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Let me check the output again.

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Now, the speeds looks normal to me.

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Yeah.

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So it's working.

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We need to add two more lines here to make this more complete.

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And that is, you need to release the video.

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This is a good practice to do.

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And served to destroy all the windows, that is the methods, and let's try the program again to make

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sure everything is working smoothly.

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So here is the window.

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Hello again.

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Press cue to quit.

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And it's quite.

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There is a bit of delay in my computer, though.

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But anyway, if this is the final program.

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Capturing the video from webcam, detecting the faces in the video, showing the video on the screen

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and also writing the video file in a video a V file, so I hope it works for you and I'll talk to you

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in the next videos.

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So you.