ffmpeg version N-68881-ga79ac73 Copyright (c) 2000-2015 the FFmpeg developers
  built on Jan  5 2015 22:02:22 with gcc 4.9.2 (GCC)
  configuration: --enable-gpl --enable-version3 --disable-w32threads --enable-avisynth --enable-bzlib --enable-fontconfig --enable-frei0r --enable-gnutls --enable-iconv --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libfreetype --enable-libgme --enable-libgsm --enable-libilbc --enable-libmodplug --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-librtmp --enable-libschroedinger --enable-libsoxr --enable-libspeex --enable-libtheora --enable-libtwolame --enable-libvidstab --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxavs --enable-libxvid --enable-lzma --enable-decklink --enable-zlib
  libavutil      54. 16.100 / 54. 16.100
  libavcodec     56. 19.100 / 56. 19.100
  libavformat    56. 18.100 / 56. 18.100
  libavdevice    56.  3.100 / 56.  3.100
  libavfilter     5.  6.100 /  5.  6.100
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
Guessed Channel Layout for  Input Stream #0.0 : stereo
Input #0, wav, from 'Unknown Artist - Unknown Title.wav':
  Duration: 00:25:16.72, bitrate: 1411 kb/s
    Stream #0:0: Audio: pcm_s16le ([1][0][0][0] / 0x0001), 44100 Hz, 2 channels, s16, 1411 kb/s
Output #0, flac, to 'Unknown Artist - Unknown Title.flac':
  Metadata:
    encoder         : Lavf56.18.100
    Stream #0:0: Audio: flac, 44100 Hz, stereo, s16, 128 kb/s
    Metadata:
      encoder         : Lavc56.19.100 flac
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> flac (native))
Press [q] to stop, [?] for help
size=   15301kB time=00:01:43.13 bitrate=1215.4kbits/s    
size=   28662kB time=00:03:20.51 bitrate=1171.0kbits/s    
size=   41736kB time=00:04:58.42 bitrate=1145.7kbits/s    
size=   54646kB time=00:06:37.58 bitrate=1125.9kbits/s    
size=   69008kB time=00:08:20.29 bitrate=1130.0kbits/s    
size=   82288kB time=00:09:58.62 bitrate=1126.1kbits/s    
size=   99165kB time=00:11:51.36 bitrate=1142.0kbits/s    
size=  115642kB time=00:13:53.09 bitrate=1137.1kbits/s    
size=  130523kB time=00:15:44.79 bitrate=1131.7kbits/s    
size=  146081kB time=00:17:46.21 bitrate=1122.4kbits/s    
size=  161740kB time=00:19:41.36 bitrate=1121.6kbits/s    
size=  177793kB time=00:21:40.06 bitrate=1120.3kbits/s    
size=  193618kB time=00:23:36.67 bitrate=1119.6kbits/s    
size=  206758kB time=00:25:16.72 bitrate=1116.7kbits/s    
video:0kB audio:206750kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.003915%