Re: working with mp3 files

[Celejar <celejar@gmail.com>]

On Thu, 29 Oct 2020 19:58:48 +0100
Nicolas George <george@nsup.org> wrote:

> Siard (12020-10-29):
> > > ffmpeg -f concat -safe 0 -i <(for f in ./*.mp4; do echo "file '$PWD/$f'"; done) -c copy output.mp4
> > 
> > The method that I know is slightly different. I once took it from
> > https://medium.com/abraia/basic-video-editing-for-social-media-with-ffmpeg-commands-1e873801659
> > but that site has apparently been simplified now and concatenation has been
> > removed.
> > I found that it works fine for mp3's as well.
> > 
> > Create join.txt file that contains the exact paths of the files that you
> > want to join. All files should be same format (same codec). The path name
> > of all files should be mentioned one by one like below.
> >   file /home/xx/myvideos/part1.mp4
> >   file /home/xx/myvideos/part2.mp4
> >   file /home/xx/myvideos/part3.mp4
> >   file /home/xx/myvideos/part4.mp4
> > Now, join all files using command:
> > $ ffmpeg -f concat -i join.txt -c copy output.mp4
> > If you get an error something like below;
> >   [concat @ 0x555fed174cc0] Unsafe file name '/path/to/mp4'
> >   join.txt: Operation not permitted
> > add "-safe 0":
> > $ ffmpeg -f concat -safe 0 -i join.txt -c copy output.mp4
> 
> That's exactly the same method, you are just using a file instead of a
> shell pipe substitution.

And both variations are mentioned in the page I linked to:

https://trac.ffmpeg.org/wiki/Concatenate

Celejar