title: ffmpeg missing image frames in generated video from images
body: <p>Similar question <a href="https://stackoverflow.com/q/8384142/2620328">here</a>, but not yet answered.</p>
  <h3>Problem:</h3>
  <p>I'm combining images (.png) of same resolution/size (they all came from the same matplotlib.pyplot), but the resulting video is missing several frames.</p>
  <h3>Command:</h3>
  <pre><code>ffmpeg -f image2 -r 1 -i .\\images\\image%02d.png -c:v libx264 -r 30 .\\images\\output.mp4
  </code></pre>
  <h3>Resulting Video</h3>
  <ul>
  <li>Length of 0:09</li>
  <li>Missing more than half the images</li>
  </ul>
  <h3>Images</h3>
  <ul>
  <li>.\images
  <ul>
  <li>image00.png</li>
  <li>image01.png</li>
  <li>image02.png</li>
  <li>image03.png</li>
  <li>image04.png</li>
  <li>image05.png</li>
  <li>image06.png</li>
  <li>image07.png</li>
  <li><b>. . .</b></li>
  </ul>
  </li>
  </ul>
  <h3>Notes:</h3>
  <p>I followed examples from <a href="http://trac.ffmpeg.org/wiki/Create%20a%20video%20slideshow%20from%20images" rel="nofollow noreferrer">here</a>. I'm new to using ffmpeg, so I may not be completely sure of what each of the command line options I've used means, though I have a pretty good idea.</p>
  <p>Thanks, any help/advice/suggestions will be greatly appreciated. I am also perfectly willing to provide further information that may help resolve this issue.</p>