user27369: I am writing as follows for a sequence of images like image1.png, image2.png, image3.png … image1234.png. My code for that is:
ffmpeg -framerate5 -start number 1 -i ".\Image%4d.png" -pix_fmt yuv420p text.mp4

But what pattern is needed for 0001.png, 0004.png, 0007.png, 0010.png, 0013.png, 0016.png, 0019.png?

user1760: Sequential series
1.png
%d.png

01.png
%02d.png

001.png
%03d.png

0001.png
%04d.png

image0001.png
image%04d.png

Non sequential series
If they image inputs are not sequential then use the glob wildcard:
ffmpeg -framerate 5 -pattern_type glob -i "*.png" output.mp4

The glob pattern may not be supported by Windows. In that case rename your images or use cat:
cat *.png | ffmpeg -framerate 5 -i - output.mp4


See the image demuxer documentation for more info.

27369: <p>I am writing as follows for a sequence of images like <code>image1.png</code>, <code>image2.png</code>, <code>image3.png</code> … <code>image1234.png</code>. My code for that is:</p>

<pre><code>ffmpeg -framerate5 -start number 1 -i ".\Image%4d.png" -pix_fmt yuv420p text.mp4
</code></pre>

<p>But what pattern is needed for <code>0001.png</code>, <code>0004.png</code>, <code>0007.png</code>, <code>0010.png</code>, <code>0013.png</code>, <code>0016.png</code>, <code>0019.png</code>?</p>
 1760: <h1>Sequential series</h1>

<h3>1.png</h3>

<pre><code>%d.png
</code></pre>

<h3>01.png</h3>

<pre><code>%02d.png
</code></pre>

<h3>001.png</h3>

<pre><code>%03d.png
</code></pre>

<h3>0001.png</h3>

<pre><code>%04d.png
</code></pre>

<h3>image0001.png</h3>

<pre><code>image%04d.png
</code></pre>

<h1>Non sequential series</h1>

<p>If they image inputs are not sequential then use the glob wildcard:</p>

<pre><code>ffmpeg -framerate 5 -pattern_type glob -i "*.png" output.mp4
</code></pre>

<p>The glob pattern may not be supported by Windows. In that case rename your images or use <code>cat</code>:</p>

<pre><code>cat *.png | ffmpeg -framerate 5 -i - output.mp4
</code></pre>

<hr>

<p>See the <a href="https://ffmpeg.org/ffmpeg-formats.html#image2-1" rel="nofollow noreferrer">image demuxer documentation</a> for more info.</p>
