gistfile1.txt

➜  video git:(audio-transcrpition) ✗ ffmpeg  -f concat -safe -0 -i files.txt -c:v qtrle -c copy output.mp4
ffmpeg version 3.2.1 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/3.2.1 --enable-shared --enable-pthreads --enable-gpl --enable-version3 --enable-hardcoded-tables --enable-avresample --cc=clang --host-cflags= --host-ldflags= --enable-libass --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libxvid --enable-opencl --enable-openssl --disable-lzma --enable-nonfree --enable-vda
  libavutil      55. 34.100 / 55. 34.100
  libavcodec     57. 64.101 / 57. 64.101
  libavformat    57. 56.100 / 57. 56.100
  libavdevice    57.  1.100 / 57.  1.100
  libavfilter     6. 65.100 /  6. 65.100
  libavresample   3.  1.  0 /  3.  1.  0
  libswscale      4.  2.100 /  4.  2.100
  libswresample   2.  3.100 /  2.  3.100
  libpostproc    54.  1.100 / 54.  1.100
[concat @ 0x7ffb5d805e00] Could not find codec parameters for stream 1 (Unknown: none): unknown codec
Consider increasing the value for the 'analyzeduration' and 'probesize' options
Input #0, concat, from 'files.txt':
  Duration: N/A, start: 0.000000, bitrate: 168642 kb/s
    Stream #0:0(eng): Video: prores (ap4h / 0x68347061), yuva444p10le(smpte170m/smpte170m/bt709), 956x714, 168642 kb/s, 60 fps, 60 tbr, 60 tbn, 60 tbc
    Metadata:
      creation_time   : 2016-11-29T22:19:05.000000Z
      handler_name    : Core Media Data Handler
      encoder         : Apple ProRes 4444
      timecode        : 00:00:00:00
    Stream #0:1: Unknown: none
File 'output.mp4' already exists. Overwrite ? [y/N] y
[mp4 @ 0x7ffb5c003200] Could not find tag for codec prores in stream #0, codec not currently supported in container
Could not write header for output file #0 (incorrect codec parameters ?): Invalid argumentStream mapping:
  Stream #0:0 -> #0:0 (copy)
    Last message repeated 1 times

gistfile2.txt

file '/Users/jarred/code/client/video/headphones.mov'
file '/Users/jarred/code/client/video/headphones-r.mov'