[FFmpeg-user] emerge has unconnected output? Works on FFMPEG 4, not 3

[Michael Koch]

Am 23.11.2020 um 13:50 schrieb KarlMessner:
> Good morning folks,
>
> Any idea what I'm doing wrong here:
>
> /usr/local/bin/ffmpeg -report -i videos/intro720.mp4 -i videos/raw.mp4 -i
> videos/outro720.mp4 -i videos/music.mp3 -filter_complex " \
> [0]
> scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1[v0];
> \
> [1]
> scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1[v1];
> \
> [2]
> scale=1280:720:force_original_aspect_ratio=decrease,pad=1280:720:(ow-iw)/2:(oh-ih)/2,setsar=1[v2];
> \
> [3:a]volume=.015[a0]; \
> *[1:a][a0]amerge[amix]; \
> *[v0][0:a:0] [v1][aMix] [v2][2:a:0] concat=n=3:v=1:a=1[v][a]" -map "[v]"
> -map "[a]" -f mp4 videos/out1606134367mp4 2>&1

Try to remove all space characters from the filter chain. Especially 
those between the inputs of the concat filter. I'm not sure if this 
solves the problem, but it's worth a try.

Michael