 when the mouse pointer reaches within <var>PIXELS</var> (greater than
zero) to the edge of region.
</p>
<p>For example:
</p><div class="example">
<pre class="example">ffmpeg -f x11grab -follow_mouse centered -framerate 25 -video_size cif -i :0.0 out.mpg
</pre></div>

<p>To follow only when the mouse pointer reaches within 100 pixels to edge:
</p><div class="example">
<pre class="example">ffmpeg -f x11grab -follow_mouse 100 -framerate 25 -video_size cif -i :0.0 out.mpg
</pre></div>

</dd>
<dt>&lsquo;<samp>f