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Problem with Sound changed after merging two video askubuntu

cn flag

I am trying to merge two video by lossless-cut, openshut video app and below codes from here:

ffmpeg -f concat -safe 0 -i /home/so/Videos/files.txt -c copy  '/home/so/Videos/s-۲۰۲۱-۰۹-۲۸_۱۰.۳۷.۵۰-low.mp4'

with files.txt content like:

# this is a comment
file '/home/so/Videos/Colorful Illustration Social and Emotional Learning SEL Feelings Check In Weather Education Presentation (2).mp4'
file '/home/so/Videos/s-۲۰۲۱-۰۹-۲۸_۱۰.۳۷.۵۰.mp4'

But after converting, the sound of the second video has been changed.

But this merging is working on shotcut app with below configuration:

enter image description here

So I have asked here to find out the way for fixing the lossless-cut, or by adding more option to bash by ffmpeg ... command.

Thanks.

llogan avatar
jp flag
Each input must have the same attributes to properly concatenate. Yours probably do not have the same attributes. Copy and paste the complete output of `ffmpeg -n -i "Colorful Illustration Social and Emotional Learning SEL Feelings Check In Weather Education Presentation (2).mp4" -i "s-۲۰۲۱-۰۹-۲۸_۱۰.۳۷.۵۰.mp4"`. This will provide info to determine what attributes are different.
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