Concatenate (non-encoding) without creating a text file ffmpeg

Question

So after all the searches, I couldn't find anything relating to this topic. Can I do a non-encoding concatenation without having to create a text file?

Answer 1

The concat demuxer can only read from a file pointer or URL. The contents of the file cannot be replaced by commandline options.

What you can do instead is to use process substitution (if your shell supports it) to generate the file on the fly:

ffmpeg -f concat -safe 0 -i <(for f in ./*.wav; do echo "file '$PWD/$f'"; done) -c copy output.wav

Here, <(…) returns a file pointer that can be opened by ffmpeg as if it was a regular file.

More example are given here: https://trac.ffmpeg.org/wiki/Concatenate#Automaticallygeneratingtheinputfile