Concatenate pairs of mp3 files with ffmpeg or cat?

Question

I've got a directory of mp3 files, which look a little like this:

Blue Elephant part 1.mp3
Blue Elephant part 2.mp3
Tale of Two Cities part 1.mp3
Tale of Two Cities part 2.mp3
Lookism part 1.mp3
Lookism part 2.mp3

There's always two parts, and they are named consistently. I want to output:

Blue Elephant.mp3
Tale of Two Cities.mp3
Lookism.mp3

... so each pair of files is merged. How would I do this with ffmpeg or cat on the command line?

Answer 1

Try this:

ffmpeg -i "concat:Blue Elephant part 1.mp3|Blue Elephant part 2.mp3" -i "Blue Elephant part 2.mp3" -acodec copy Blue Elephant.mp3 -map_metadata 0:1