title: Qt Access Webcam on Linux OS without downloading any package
body: <p>I am looking for some Links/Tutorials/Examples to Access my Webcam on Linux OS without downloading any packages. </p>
  
  <p>Actually, I am working on a very compact OS (with already removed unnecessary packages).We are space conscious for this project.</p>
  
  <p>I tried OpenCv (on other machine with full OS version) and it worked fine for me but its package is more than 100 Mb and in my project i cant afford that much space. Also, since many packages are already removed from this OS (to make it compact), I am unable to install Opencv on my machine to test it(Because of its missing dependencies).</p>
  
  <p>So I wonder, Is there any other way to access webcam without downloading any packages??</p>
  
  <p>Adding headers/files would be fine in my case.</p>
  
  <p>Any help, suggestion would be really appreciated.</p>
  
  <p>Thanks in advance.</p>