title: Specify frame rate while reading a video using skvideo.io.vread
body: <p>I'm reading a video using <code>skvideo.io.vread</code></p>
  
  <pre><code>import skvideo.io
  video_frames = skvideo.io.vread(video_filepath)
  </code></pre>
  
  <p>My video has a frame rate of 50fps. But I want to read the video at 4fps, I mean I need to read only 4 frames per second of the video. Is there any option to read at specified frame rate or do I have to manually discard extra frames read?</p>