FFMPEG erro ao concatenar arquivos MP4

Question

Oi Este é o comando que estou usando

ffmpeg ^
    -i Intro.mp4 ^
    -i Titleout.mp4 ^
    -i Slide1Headingout.mp4 ^
    -i Slide1Content1out.mp4 ^
    -i Slide1Content2out.mp4  ^
    -i Slide2Headingout.mp4   ^
    -i Slide2Content1out.mp4  ^
    -i Slide2Content2out.mp4  ^
    -i Slide3Headingout.mp4   ^
    -i Slide3Content1out.mp4  ^
    -i Slide3Content2out.mp4  ^
    -i Slide4Headingout.mp4   ^
    -i Slide4Content1out.mp4  ^
    -i Slide4Content2out.mp4  ^
    -i Slide5Headingout.mp4   ^
    -i Slide5Content1out.mp4  ^
    -i Slide5Content2out.mp4  ^
    -i Footer.mp4 ^
    -filter_complex ^
"[0]setdar=16/9[a];[1]setdar=16/9[b];[2]setdar=16/9[c];[3]setdar=16/9[d]; [a][b][c][d]concat=n=4:v=1:a=1" output.mp4

Estou recebendo este erro

[Parsed_setdar_1 @ 00000224fb9565e0] Media type mismatch between the 'Parsed_setdar_1' filter output pad 0 (video) and the 'Parsed_concat_4' filter input pad 1 (audio)
[AVFilterGraph @ 00000224fb955740] Cannot create the link setdar:0 -> concat:1
Error initializing complex filters.
Invalid argument