I am using ffmpeg for Concatenating two MP3 files together,
I use this command :
ffmpeg -y -i first.mp3 -i second.mp3 -filter_complex "[0:0][1:0] amix=inputs=2:duration=longest" -c:a libmp3lame output.mp3
It works, but there is a little problem, the overlay together!
I want first song plays, and when it finished, second file starts (in output file)
But now they starts at the same time.
How can i change that command, to have a output that contains first song then when the first finished, second plays ?
Plus, I've tried concat command but not worked, I just can use something like what i sent.
Answer
To skip re-encoding, use the concat demuxer:
Create a text file
file '/path/to/first.mp3'
file '/path/to/second.mp3'
and then
ffmpeg -f concat -i list.txt -c copy out.mp3
If re-encoding is fine,
ffmpeg -i first.mp3 -i second.mp3 -filter_complex [0:a][1:a]concat=n=2:v=0:a=1 out.mp3
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