title: Changing the background color of the movie while using tpad and adelay
body: <p>i want to change the background color of a movie while using <code>tpad</code> and <code>adelay</code> commands. it is now black ( until the movie starts).</p>
  
  <p>the command i tried listed below, and i don't know how to change the color while the movie is in it's delay ( probably something with the <code>tpad</code> that needs to be change).</p>
  
  <pre><code> -filter_complex [0:v]scale=1920:1080,tpad=start_duration=5[v];
    [0:a]adelay=5s|s[a] -map [v] -map [a] -b 6000k
  </code></pre>
  
  <p>the 5 seconds that the movie is in its <code>"waiting mode"</code> needs to be changed from default black to some other color. Thanks.</p>