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copy

$ ffmpeg -f concat -i inputs.txt -vcodec copy -acodec copy final.mov
ffmpeg version 3.1.4 Copyright (c) 2000-2016 the FFmpeg developers
  built with Apple LLVM version 8.0.0 (clang-800.0.38)
  configuration: --prefix=/usr/local/Cellar/ffmpeg/3.1.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libxvid --disable-lzma --enable-vda
  libavutil      55. 28.100 / 55. 28.100
  libavcodec     57. 48.101 / 57. 48.101
  libavformat    57. 41.100 / 57. 41.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 47.100 /  6. 47.100
  libavresample   3.  0.  0 /  3.  0.  0
  libswscale      4.  1.100 /  4.  1.100
  libswresample   2.  1.100 /  2.  1.100
  libpostproc    54.  0.100 / 54.  0.100
[concat @ 0x7fe155000000] Line 1: unknown keyword 'soccer1.mp4'
inputs.txt: Invalid data found when processing input

prog.cpp:2:16: error: too many decimal points in number
 ffmpeg version 3.1.4 Copyright (c) 2000-2016 the FFmpeg developers
                ^~~~~
prog.cpp:3:33: error: too many decimal points in number
   built with Apple LLVM version 8.0.0 (clang-800.0.38)
                                 ^~~~~
prog.cpp:3:46: error: too many decimal points in number
   built with Apple LLVM version 8.0.0 (clang-800.0.38)
                                              ^~~~~~~~
prog.cpp:4:52: error: too many decimal points in number
   configuration: --prefix=/usr/local/Cellar/ffmpeg/3.1.4 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-opencl --enable-libx264 --enable-libmp3lame --enable-libxvid --disable-lzma --enable-vda
                                                    ^~~~~
prog.cpp:14:9: error: stray ‘@’ in program
 [concat @ 0x7fe155000000] Line 1: unknown keyword 'soccer1.mp4'
         ^
prog.cpp:14:51: warning: character constant too long for its type
 [concat @ 0x7fe155000000] Line 1: unknown keyword 'soccer1.mp4'
                                                   ^~~~~~~~~~~~~
prog.cpp:1:1: error: ‘$’ does not name a type
 $ ffmpeg -f concat -i inputs.txt -vcodec copy -acodec copy final.mov
 ^

Standard output is empty