ffmpeg version N-69351-gfb34c58 Copyright (c) 2000-2015 the FFmpeg developers
  built on Jan 28 2015 02:36:35 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. 18.100 / 54. 18.100
  libavcodec     56. 21.100 / 56. 21.100
  libavformat    56. 19.100 / 56. 19.100
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5.  9.101 /  5.  9.101
  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: 00:33:07.73, 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         : Lavf56.19.100
    Stream #0:0: Audio: flac, 44100 Hz, stereo, s16, 128 kb/s
    Metadata:
      encoder         : Lavc56.21.100 flac
Stream mapping:
  Stream #0:0 -> #0:0 (pcm_s16le (native) -> flac (native))
Press [q] to stop, [?] for help
size=   10381kB time=00:02:38.40 bitrate= 536.8kbits/s    
size=   22289kB time=00:05:24.33 bitrate= 563.0kbits/s    
size=   32932kB time=00:08:05.77 bitrate= 555.4kbits/s    
size=   45008kB time=00:10:50.97 bitrate= 566.4kbits/s    
size=   58349kB time=00:13:35.43 bitrate= 586.2kbits/s    
size=   70175kB time=00:16:18.96 bitrate= 587.2kbits/s    
size=   83574kB time=00:19:03.74 bitrate= 598.6kbits/s    
size=   94008kB time=00:21:50.09 bitrate= 587.8kbits/s    
size=  106138kB time=00:24:32.99 bitrate= 590.3kbits/s    
size=  117658kB time=00:27:22.37 bitrate= 586.9kbits/s    
size=  129742kB time=00:30:08.09 bitrate= 587.8kbits/s    
size=  145954kB time=00:32:43.88 bitrate= 608.8kbits/s    
size=  148192kB time=00:33:07.73 bitrate= 610.7kbits/s    
video:0kB audio:148184kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.005462%