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Python 3 OpenCV Script to Replace Background of Video With Solid Color Green Screen in Terminal
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Jun 3, 2025
Get the full source code of application here: https://codingshiksha.com/python/python-3-opencv-script-to-replace-background-of-video-with-solid-color-green-screen-in-terminal/
View Video Transcript
0:00
uh hello guys welcome to this video so
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in this video I will show you how to
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change the background of the video with
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a solid color so you can see this is
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actually a original video with the
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original background here gray background
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so I will actually change this
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background with a solid
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color let's suppose a green green screen
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it can be a blue color so let me show
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you the output the output will will look
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something like this a green screen video
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you can easily create a green screen
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video you can replace the background of
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the video with a solid color it can be
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green it can be red it can be blue so in
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this video I will show you a Python
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script which does this automatically and
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uh for doing this we need some packages
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open-source packages so the very first
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package we need is Open
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CV-Python so the command is simple
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simply execute this command to install
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this package the second package is
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required is media pipe which is also a
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very good package
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for changing the background of the video
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so install this package as well it
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contains various data models and thirdly
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you will also need this package numpy
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which is array computing
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package not this one this
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package so just install these three
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packages after that just create a app py
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file and the full script is given in the
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description of this video so first of
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all I will import all the three packages
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open cv media pipe and numpy
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after importing it we need to initialize
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the media
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pipe
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package like
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this after that we just need to
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say need to call this model selection
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one so in this way we can initialize the
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media pipe library we are passing this
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model which is
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one it contains various models but we
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using the basic model one and then we
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need to initiate
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or
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or initialize the video for this we use
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the video capture method of open CV and
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here we specify whichever video we are
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working so we are loading the video that
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we are input video so this is the input
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video so we are passing this to this
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function after that we initialize the
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width height and the
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FPS using these
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methods after that we initialize another
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this
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one again for this is MP4 video so here
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we are passing MP4 and then we are
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writing this output video which will get
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created output green background
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MP4 and passing all this and here you
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can select the green color it can be any
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color so you can select for green we
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write here 0
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255
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25 so this is green background but here
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you can change to any color let's
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suppose I make it a red color video so
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here you will provide this RGB color
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after that you run this file
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loop we do this for each second each
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frame in the video and
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uh we read each frame
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and
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so we read each
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frame by open CV method
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after that we get the
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result segment
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process and then we mass result dot
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segmentation
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mask and then we use this condition is
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equal to mask greater than
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0.5
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and this we are
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using numpy library and Then we put this
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solid color background in the background
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of the video with these two
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lines like
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this and then we combine the map the
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mask and then write this video with
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these two lines of
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code we are writing this output video
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and then
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we release all the resources and print
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out a statement that your video has been
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generated so that's all if you don't
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understand fully the code it's normal
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it's little bit complicated code but I
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have given the script in the description
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so once you get the code you can better
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understand so if I execute this script
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now you will see it will take some time
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around about uh if you're running it for
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the very first time it will take around
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30 seconds and then it will process your
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video it depends upon how much long is
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the video in my case it's 17 second long
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video so it will not take much time so
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it's 15 second video so if your video is
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large then it will take some large time
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so here we are just providing a red
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color if you
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check so the background should change to
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red color so just wait for the process
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to
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finish and in this way you can put any
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solid background color it can be a green
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screen it can be a red blue color so
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it's very easy to do using
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Python so just wait for the process to
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finish and then we can show you the
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result you can see it is using
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TensorFlow this media pipe library is
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depending upon TensorFlow it is using
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this package as well
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so so media pipe is a
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very complicated but still a very
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powerful library when it comes to
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changing the video
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background uh you can now see it has
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completed and uh if I show you the
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output
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here you can see the output changes to
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uh blue
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color that was the original video this
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was the original video and it changes
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the whole background of the video to a
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solid color which is blue color so in
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this easy way you can change to any
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color you just need to provide the value
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inside the RGB so right
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here this is for blue color and thank
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you very much for watching this video
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and also check out my website
7:18
freemediatools.com
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uh which contains thousands of tools
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