title: Open GL single line in an image is rendered
body: <p>I'm trying to playback video using Open GL-ES. I was able to create the window, surface, shaders, program and set Vertex attributes. But the image is not getting displayed properly. Only a single vertical line in the image is rendered in the entire frame. I'm new to OpenGL and not being able to figure out the issue. I've attached the expected image and the current rendered image . Pixels in the bottom right corner of the original image are  only being rendered. Can anyone please help me?</p>
  
  <p><a href="https://i.stack.imgur.com/uvLlB.jpg" rel="nofollow noreferrer">Current rendering</a></p>
  
  <p><a href="https://i.stack.imgur.com/URYmh.jpg" rel="nofollow noreferrer">Expected image</a></p>