ffmpeg version 2.8.8-0ubuntu0.16.04.1 Copyright (c) 2000-2016 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.2) 20160609
  configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  libavutil      54. 31.100 / 54. 31.100
  libavcodec     56. 60.100 / 56. 60.100
  libavformat    56. 40.101 / 56. 40.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 40.101 /  5. 40.101
  libavresample   2.  1.  0 /  2.  1.  0
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  2.101 /  1.  2.101
  libpostproc    53.  3.100 / 53.  3.100
Splitting the commandline.
Reading option '-i' ... matched as input file with argument '/home/robbert/Downloads/closer.mp3'.
Reading option '-f' ... matched as option 'f' (force format) with argument 's16le'.
Reading option '-ar' ... matched as option 'ar' (set audio sampling rate (in Hz)) with argument '48000'.
Reading option '-ac' ... matched as option 'ac' (set number of audio channels) with argument '2'.
Reading option 'pipe:1' ... matched as output file.
Reading option '-loglevel' ... matched as option 'loglevel' (set logging level) with argument 'debug'.
Finished splitting the commandline.
Parsing a group of options: global .
Applying option loglevel (set logging level) with argument debug.
Successfully parsed a group of options.
Parsing a group of options: input file /home/robbert/Downloads/closer.mp3.
Successfully parsed a group of options.
Opening an input file: /home/robbert/Downloads/closer.mp3.
[mp3 @ 0x1808340] Format mp3 probed with size=4096 and score=51
[mp3 @ 0x1808340] id3v2 ver:4 flags:00 len:147
[mp3 @ 0x1808340] Skipping 0 bytes of junk at 574.
[mp3 @ 0x1808340] Before avformat_find_stream_info() pos: 574 bytes read:32768 seeks:0
[mp3 @ 0x1808340] All info found
[mp3 @ 0x1808340] After avformat_find_stream_info() pos: 22078 bytes read:32768 seeks:0 frames:50
Input #0, mp3, from '/home/robbert/Downloads/closer.mp3':
  Metadata:
    major_brand     : dash
    minor_version   : 0
    compatible_brands: iso6mp41
    creation_time   : 2016-07-27 18:05:04
    encoder         : Lavf54.20.4
  Duration: 00:04:21.88, start: 0.000000, bitrate: 128 kb/s
    Stream #0:0, 50, 1/14112000: Audio: mp3, 44100 Hz, stereo, s16p, 128 kb/s
Successfully opened the file.
Parsing a group of options: output file pipe:1.
Applying option f (force format) with argument s16le.
Applying option ar (set audio sampling rate (in Hz)) with argument 48000.
Applying option ac (set number of audio channels) with argument 2.
Successfully parsed a group of options.
Opening an output file: pipe:1.
Successfully opened the file.
detected 2 logical cores
[graph 0 input from stream 0:0 @ 0x1819fa0] Setting 'time_base' to value '1/44100'
[graph 0 input from stream 0:0 @ 0x1819fa0] Setting 'sample_rate' to value '44100'
[graph 0 input from stream 0:0 @ 0x1819fa0] Setting 'sample_fmt' to value 's16p'
[graph 0 input from stream 0:0 @ 0x1819fa0] Setting 'channel_layout' to value '0x3'
[graph 0 input from stream 0:0 @ 0x1819fa0] tb:1/44100 samplefmt:s16p samplerate:44100 chlayout:0x3
[audio format for output stream 0:0 @ 0x181a420] Setting 'sample_fmts' to value 's16'
[audio format for output stream 0:0 @ 0x181a420] Setting 'sample_rates' to value '48000'
[audio format for output stream 0:0 @ 0x181a420] Setting 'channel_layouts' to value '0x3'
[audio format for output stream 0:0 @ 0x181a420] auto-inserting filter 'auto-inserted resampler 0' between the filter 'Parsed_anull_0' and the filter 'audio format for output stream 0:0'
[AVFilterGraph @ 0x1825980] query_formats: 4 queried, 6 merged, 3 already done, 0 delayed
[auto-inserted resampler 0 @ 0x181c960] [SWR @ 0x1835f20] Using s16p internally between filters
[auto-inserted resampler 0 @ 0x181c960] ch:2 chl:stereo fmt:s16p r:44100Hz -> ch:2 chl:stereo fmt:s16 r:48000Hz
Output #0, s16le, to 'pipe:1':
  Metadata:
    major_brand     : dash
    minor_version   : 0
    compatible_brands: iso6mp41
    encoder         : Lavf56.40.101
    Stream #0:0, 0, 1/48000: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
    Metadata:
      encoder         : Lavc56.60.100 pcm_s16le
Stream mapping:
  Stream #0:0 -> #0:0 (mp3 (native) -> pcm_s16le (native))
Press [q] to stop, [?] for help
size=      59kB time=00:00:00.27 bitrate=1536.0kbits/s