title: Trying to combine 2 FFmpeg commands
body: <p>I have 2 FFmpeg commands which I need t combine, for the sake of speed.</p>
  
  <p>This one builds a simple slideshow using a list of images located on my remote server.</p>
  
  <pre><code>ffmpeg -y -f concat -safe 0 -protocol_whitelist "file,http,https,tcp,tls" -i "Temp/images.txt" -filter_complex "[0]scale=7680x4320,zoompan=z='if(lte(zoom,1.0),1.2,max(1.001,zoom-0.0006))':x='iw/2-(iw/zoom/2)':y='ih/2-(ih/zoom/2)':fps=30:d=300" -c:v libx264 -preset veryfast -shortest "Temp/video.mp4"
  </code></pre>
  
  <p>This one overlays the video we just created aswel as another video (marquee.mp4) and a showwaves effect ontop of a background image, then adds audio. (showwaves effect is tied to said audio)</p>
  
  <pre><code>ffmpeg -y -framerate 30 -i "Assets/Screens/background.png" -i "Temp/audio.mp3" -filter_complex "movie=Temp/video.mp4[a];movie=Temp/marquee.mp4:loop=0,setpts=N/FRAME_RATE/TB[b];[0][a]overlay=570:70[c];[c][b]overlay=570:880[d];[1:a]showwaves=mode=cline:s=254x81:scale=sqrt:colors=0x222222,colorkey=0x000000:0.01:0.1,format=yuva420p[w];[d][w]overlay=148:375,scale=1920:1080[outv]" -map "[outv]" -map 1:a -movflags +faststart -c:v libx264 -c:a aac -preset veryfast -shortest done.mp4
  </code></pre>
  
  <p>Would it be possible to combine all of this into one command? So that rather than taking the created slideshow video and overlaying, it just generates the slideshow in-place.</p>
  
  <p>Thank you for your time.</p>