> I was trying to attach audio to a video which adding an overlay image to
> it. Im using the following command:
> -y, -r, 11.0, -f, image2, -i, /storage/emulated/0/
> TestDirectory/TempImages/img%03d.jpg, -i, /storage/emulated/0/TestDirectory/introSound.mp3,
> -i, /storage/emulated/0/TestDirectory/TempImagesNatural.png,
> -filter_complex, [audio]apad[audio];overlay=0:0, -shortest, -crf, 20,
> -map, [audio], -c:v, libx264, -preset, ultrafast, -pix_fmt, yuv420p, -ac,
> 2, /storage/emulated/0/TestDirectory/finalOutPut.mp4]
> but its not working. Im getting the error
> Output with label 'audio' does not exist in any defined filter graph, or
> was already used.
> Thank you for the help.