paste.log

ffmpeg version N-78733-g0f31d40 Copyright (c) 2000-2016 the FFmpeg developers
  built with Apple LLVM version 7.0.2 (clang-700.1.81)
  configuration:
  libavutil      55. 19.100 / 55. 19.100
  libavcodec     57. 25.101 / 57. 25.101
  libavformat    57. 26.100 / 57. 26.100
  libavdevice    57.  0.101 / 57.  0.101
  libavfilter     6. 36.100 /  6. 36.100
  libswscale      4.  0.100 /  4.  0.100
  libswresample   2.  0.101 /  2.  0.101
Splitting the commandline.
Reading option '-f' ... matched as option 'f' (force format) with argument 'jack'.
Reading option '-i' ... matched as input file with argument '1'.
Reading option '-f' ... matched as option 'f' (force format) with argument 'jack'.
Reading option '2' ... matched as output file.
Reading option '-v' ... matched as option 'v' (set logging level) with argument 'trace'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option v (set logging level) with argument trace.
Successfully parsed a group of options.
Parsing a group of options: input file 1.
Applying option f (force format) with argument jack.
Successfully parsed a group of options.
Opening an input file: 1.
[jack @ 0x7fdb5b804000] JACK client registered and activated (rate=44100Hz, buffer_size=256 frames)
[jack @ 0x7fdb5b804000] All info found
[jack @ 0x7fdb5b804000] 0: start_time: 1457062347.939 duration: -9223372036854.775
[jack @ 0x7fdb5b804000] stream: start_time: 1457062347.939 duration: -9223372036854.775 bitrate=2822 kb/s
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, jack, from '1':
  Duration: N/A, start: 1457062347.939424, bitrate: 2822 kb/s
    Stream #0:0, 1, 1/1000000: Audio: pcm_f32le, 44100 Hz, 2 channels, flt, 2822 kb/s
Successfully opened the file.
Parsing a group of options: output file 2.
Applying option f (force format) with argument jack.
Successfully parsed a group of options.
Opening an output file: 2.
Output #0, jack, to '2':
Output file #0 does not contain any stream