react-webcam npm package for optimizing video size

Question

react-webcam npm package for optimizing video size

In my React app, I'm utilizing the npm package react-webcam.

The <Webcam /> component is enclosed within a div with a dimension of {width: 100vw, height 100vh}

I aim for the video element to adjust to the parent div's size and cover 100% of the screen always, even during browser resizing. However, there appears to be a certain ratio limitation.

https://i.sstatic.net/AcYhA.jpg

^ The black-colored space in the middle should be fully occupied by the video element.

Attempted Solutions:

Set <Webcam />'s height and width to 100%
Assign 100vh and 100vw as height and width for <Webcam />
Specified auto for videoConstraint's height and width (had no effect)
Assigned 100% for videoConstraint's height and width (resulted in an error)
Removed height and width specifications altogether from videoConstraint

I have a theory that videoConstraint may have default settings that need to be overridden, but I am unsure how to do so.

Code:

const videoConstraints = {
   width: 1280,
   height: 720,
   facingMode: "user"
}


ReactDOM.render( 
 <div className = 'webcam' >
  <Webcam 
  audio = {false}
  height = {100 + '%'}
  width = {100 + '%'}
  screenshotFormat = 'image/jpeg'
  videoConstraints = {videoConstraints}
  /> 
 </div>,
  document.getElementById('root')
);

.webcam {
  padding: 2.5rem 3.5rem;
}

video {
  background-color: #000000;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/react/16.6.3/umd/react.production.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/16.6.3/umd/react-dom.production.min.js"></script>

<script src="https://unpkg.com/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="59292b3629742d20293c2a19686c776f7768">[email protected]</a>/prop-types.js"></script>
<script src="https://unpkg.com/react-webcam/dist/react-webcam.min.js"></script>
<div id="root"></div>

Check out the official page for react-webcam on npm:

https://www.npmjs.com/package/react-webcam

javascript css reactjs webcam

Answer 1

Answer №1

Enhance your setup by incorporating a hook to fetch screen dimensions:

  const isLandscape = size.height <= size.width;
  const ratio = isLandscape ? size.width / size.height : size.height / 
  size.width;

  // Implementing Hook
    function useWindowSize() {
    // Start state with undefined width/height to ensure consistency between server and client rendering
    // Check out more details here: https://joshwcomeau.com/react/the-perils-of-rehydration/
    const [windowSize, setWindowSize] = useState({
      width: undefined,
      height: undefined,
    });

    useEffect(() => {
        // Function to handle window resizing
        function handleResize() {
          // Update state with current window width/height
          setWindowSize({
            width: window.innerWidth,
            height: window.innerHeight,
          });
        }
        
        // Add event listener
        window.addEventListener("resize", handleResize);
        
        // Call handler immediately to capture initial window size in state
        handleResize();
        
        // Cleanup by removing event listener
        return () => window.removeEventListener("resize", handleResize);
      }, []); // Empty array ensures effect runs only on mount
    
      return windowSize;
    }

Utilize the retrieved size for Webcam parameters like dimensions and aspect ratio:

        <Webcam 
        height={size.height} 
        width={size.width}
        videoConstraints={{facingMode: 'user', aspectRatio: ratio}
        ref={camera => window.camera = camera} />

Source:
Example:

Answer 2

Enhance your setup by incorporating a hook to fetch screen dimensions:

  const isLandscape = size.height <= size.width;
  const ratio = isLandscape ? size.width / size.height : size.height / 
  size.width;

  // Implementing Hook
    function useWindowSize() {
    // Start state with undefined width/height to ensure consistency between server and client rendering
    // Check out more details here: https://joshwcomeau.com/react/the-perils-of-rehydration/
    const [windowSize, setWindowSize] = useState({
      width: undefined,
      height: undefined,
    });

    useEffect(() => {
        // Function to handle window resizing
        function handleResize() {
          // Update state with current window width/height
          setWindowSize({
            width: window.innerWidth,
            height: window.innerHeight,
          });
        }
        
        // Add event listener
        window.addEventListener("resize", handleResize);
        
        // Call handler immediately to capture initial window size in state
        handleResize();
        
        // Cleanup by removing event listener
        return () => window.removeEventListener("resize", handleResize);
      }, []); // Empty array ensures effect runs only on mount
    
      return windowSize;
    }

Utilize the retrieved size for Webcam parameters like dimensions and aspect ratio:

        <Webcam 
        height={size.height} 
        width={size.width}
        videoConstraints={{facingMode: 'user', aspectRatio: ratio}
        ref={camera => window.camera = camera} />

Source:
Example:

Answer 3

Answer №2

Enhance the appearance of the video element within the react-webcam component by incorporating your personal style. I have implemented this approach and it is functioning perfectly

 <div id="video-stream">
        <Webcam
          audio={false}
          screenshotFormat="image/jpeg"
          forceScreenshotSourceSize="true"
        />
</div>

style

#video-stream {
  video {
    width: 100%;
  }
}

Answer 4

Enhance the appearance of the video element within the react-webcam component by incorporating your personal style. I have implemented this approach and it is functioning perfectly

 <div id="video-stream">
        <Webcam
          audio={false}
          screenshotFormat="image/jpeg"
          forceScreenshotSourceSize="true"
        />
</div>

style

#video-stream {
  video {
    width: 100%;
  }
}

Answer 5

Answer №3

If you want to customize the video size parameters, you can do so by adding these styles in the webcam settings:

position: "absolute"

height: "100vh",

width: "100%",

objectFit: "fill"

For instance,

<Webcam
ref={webcamRef}
muted={true}
videoConstraints={videoConstraints}
style={{
position: "absolute",
textAlign: "center",
zindex: 8,
right:0,
height: "100vh",
width: "100%",
objectFit: "fill",
}}
/>

Answer 6

If you want to customize the video size parameters, you can do so by adding these styles in the webcam settings:

position: "absolute"

height: "100vh",

width: "100%",

objectFit: "fill"

For instance,

<Webcam
ref={webcamRef}
muted={true}
videoConstraints={videoConstraints}
style={{
position: "absolute",
textAlign: "center",
zindex: 8,
right:0,
height: "100vh",
width: "100%",
objectFit: "fill",
}}
/>

react-webcam npm package for optimizing video size

Answer №1

Answer №2

Answer №3

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