FFMPEG: concatenate more MP4 error problem

[marcorocchini]

Hi cats

I have this 3 mp4

https://www.dropbox.com/s/wc3rggvezpp2vp0/3.mp4?dl=0
https://www.dropbox.com/s/e1g94i3s65hcbul/4.mp4?dl=0
https://www.dropbox.com/s/87xthvhfddxn2ag/5.mp4?dl=0

that I would like concatenate with ffmpeg

I try to use:

v:\automazioneclip\core\ffmpeg.exe -y -f concat -i concatList.txt -vcodec copy -acodec copy -aspect 16:9 concat.mp4

where the concaList.txt in my case is:

file 'C:\Users\Administrator\Desktop\cat\mp4\3.mp4'
file 'C:\Users\Administrator\Desktop\cat\mp4\4.mp4'
file 'C:\Users\Administrator\Desktop\cat\mp4\5.mp4'

but I get errors:



non monotonus DTS in iutput stream 0:0 etc..

is it normal?

thanks