invalid frame size while using ffmpeg
<p>I am trying scale and convert a video:</p>

<pre><code>ffmpeg -i input.mkv -s 1920×1080 output.mp4
</code></pre>

<p>But every time it shows error (Windows):</p>

<pre><code>Invalid frame size: 1920├ù1080.
</code></pre>

<p>or on Linux:</p>

<pre><code>Invalid frame size: 1920×1080.
</code></pre>