FFmpeg – Concatenate Multiple WAV Files Using Single Command

combineconcatenationffmpegwav

I want to concatenate multiple WAV files into a single WAV file using FFMPEG.

I have used the following command and it generates the required file.

Command:

ffmpeg -f concat -i mylist.txt -c copy output.wav

File :

#mylist.txt
file '1.wav'
file '2.wav'
file '3.wav'
file '4.wav'

But as you can see the problem is that I have to create a text file to specify the list of WAV files to concatenate.

I can do all these tasks, but I would prefer a single command something that looks like

ffmpeg -i 1.wav -i 2.wav -i 3.wav -i 4.wav output.wav

ffmpeg -i "concat:1.wav|2.wav|3.wav|4.wav" -c copy output.wav

I have tried these two simple commands but they return just the voice of 1.wav
Please help me write a single command( or correct the above 2 commands ) that achieves the desired result.

Please don't suggest other Media Encoders/Editors, I want to use FFMPEG only, as it is already installed and used at other places.

Best Answer

You could try using the concat filter; it requires re-encoding, and so will take more system resources (a pretty tiny amount on any vaguely modern computer in this particular case), but PCM -> PCM audio should be mathematically lossless. In your case, you would use something like:

ffmpeg -i input1.wav -i input2.wav -i input3.wav -i input4.wav \
-filter_complex '[0:0][1:0][2:0][3:0]concat=n=4:v=0:a=1[out]' \
-map '[out]' output.wav

If you have five input files, use n=5.

Related Solutions

FFmpeg – Filename Quoting in FFmpeg Concat

You need to put everything in single quotes, and escape every single quote with

'\''

So,

foo'bar test.mp4

would be specified as:

file 'foo'\''bar test.mp4'

You can imagine it as the string being split where the first pair of single quotes end, and then continued later:

'foo'   \'   'bar test.mp4'

This is also explained in the documentation:

The quote character ' itself cannot be quoted, so you may need to close the quote and escape it.

and this bug report.

Windows – Concatenate multiple files with Windows command line

Concatenate Multiple files into One File Create Test Files

E:\Work\>for %x in (1 2 3 4) do echo %x > %x.txt

        E:\Work\>echo 1   1>1.txt

        E:\Work\>echo 2   1>2.txt

        E:\Work\>echo 3   1>3.txt

        E:\Work\>echo 4   1>4.txt

Verify test file creation

E:\Work\>dir *.txt

        Directory of E:\Work\

        2017-04-26  02:53 PM                 5 1.txt
        2017-04-26  02:53 PM                 5 2.txt
        2017-04-26  02:53 PM                 5 3.txt
        2017-04-26  02:53 PM                 5 4.txt

Concatenate files

E:\Work\>copy /b ?.txt concatenation.txt

        1.txt
        2.txt
        3.txt
        4.txt
                1 file(s) copied.

Verify concatenated file creation

E:\Work\>dir *.txt

        Directory of E:\Work\

        2017-04-26  02:53 PM                 5 1.txt
        2017-04-26  02:53 PM                 5 2.txt
        2017-04-26  02:53 PM                 5 3.txt
        2017-04-26  02:53 PM                 5 4.txt
        2017-04-26  02:54 PM                20 concatenation.txt

Verify correct contents of concatenated files

E:\Work\>type concatenation.txt

        1
        2
        3
        4

Best Answer

Related Solutions

FFmpeg – Filename Quoting in FFmpeg Concat

Windows – Concatenate multiple files with Windows command line

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