title: Wildcard for sequential images
body: <p>I'm trying to animate a series of jpg files using avconv.  Based on numerous examples, I'm trying using %d.jpg to specify the files.  Or %05d.jpg.  However, I'm getting:</p>
  
  <pre><code>avconv -i %d.jpg a.avi
  avconv version 0.8.3-4:0.8.3-0ubuntu0.12.04.1, Copyright (c) 2000-2012 the Libav developers built on Jun 12 2012 16:37:58 with gcc 4.6.3
  %d.jpg: No such file or directory
  </code></pre>
  
  <p>Here is a snip of my directory listing:</p>
  
  <pre><code>10380.jpg
  10390.jpg
  10400.jpg
  1040.jpg
  10410.jpg
  10420.jpg
  10430.jpg
  10440.jpg
  </code></pre>
  
  <p>There are jpegs from 00000.jpg to 14400.jpg</p>
  
  <p>I don't really understand that wildcard system, but that is what is in examples.</p>
  
  <p>(note:  I tagged it ffmpeg because a tag for avconv does not exist, and avconv supersedes ffmpeg)</p>
  
  <p><strong>Update</strong>
  I'm updating the question based on the answer below by @av501.</p>
  
  <p>To begin with, I have a list of png files with sequential ordering by 10.  They have text preceding a 5 digit integer.  For example:</p>
  
  <pre><code>SkinMattekNutrient_py_00000.png
  SkinMattekNutrient_py_00010.png
  SkinMattekNutrient_py_00020.png
  ...
  SkinMattekNutrient_py_10440.png
  </code></pre>
  
  <p>What would be the way to batch convert these to jpg?  I tried</p>
  
  <pre><code>convert ...
  SkinMattekNutrient_py_%05d.png %05d.jpg
  </code></pre>
  
  <p>and</p>
  
  <pre><code>convert ...
  SkinMattekNutrient_py_%5d.png %5d.jpg
  </code></pre>
  
  <p>But I get:</p>
  
  <pre><code>convert SkinMattekNutrient_py_%05d.png %05d.jpg
  convert: missing an image filename `%05d.jpg' @ error/convert.c/ConvertImageCommand/3011.
  </code></pre>