ds@flat:~/ffmpeg-git-20150127-32bit-static$ ./ffmpeg -re -i /var/www/flat_shared/mix.mp4 -c copy icecast://aacuser:f9Hsj2AS9sd@localhost/air.aac
ffmpeg version N-42716-gaa508a9-   http://johnvansickle.com/ffmpeg/    Copyright (c) 2000-2015 the FFmpeg developers
  built on Jan 27 2015 00:41:22 with gcc 4.9.2 (Debian 4.9.2-10)
  configuration: --enable-gpl --enable-version3 --disable-shared --disable-debug --enable-runtime-cpudetect --enable-libmp3lame --enable-libx264 --enable-libx265 --enable-libwebp --enable-libspeex --enable-libvorbis --enable-libvpx --enable-libfreetype --enable-fontconfig --enable-libxvid --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libtheora --enable-libvo-aacenc --enable-libvo-amrwbenc --enable-gray --enable-libopenjpeg --enable-libopus --enable-libass --enable-gnutls --cc=gcc-4.9
  libavutil      54. 17.100 / 54. 17.100
  libavcodec     56. 20.100 / 56. 20.100
  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
Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/var/www/flat_shared/mix.mp4':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42isom
    creation_time   : 2015-01-02 10:56:03
    encoder         : FAAC 1.28
    artist          : Пика
    title           : 9. Бит любой [Новый Рэп]
  Duration: 00:03:42.35, start: 0.023220, bitrate: 203 kb/s
    Stream #0:0(eng): Audio: aac (LC) (mp4a / 0x6134706D), 44100 Hz, stereo, fltp, 201 kb/s (default)
    Metadata:
      creation_time   : 2015-01-02 10:56:03
Output #0, adts, to 'icecast://aacuser:f9Hsj2AS9sd@localhost/air.aac':
  Metadata:
    major_brand     : mp42
    minor_version   : 0
    compatible_brands: mp42isom
    title           : 9. Бит любой [Новый Рэп]
    artist          : Пика
    encoder         : Lavf56.19.100
    Stream #0:0(eng): Audio: aac (mp4a / 0x6134706D), 44100 Hz, stereo, 201 kb/s (default)
    Metadata:
      creation_time   : 2015-01-02 10:56:03
Stream mapping:
  Stream #0:0 -> #0:0 (copy)
Press [q] to stop, [?] for help
[icecast @ 0xbb87620] It seems you are streaming an unsupported format.
[icecast @ 0xbb87620] It might work, but is not officially supported in Icecast!
av_interleaved_write_frame(): Broken pipe 193.5kbits/s
size=     720kB time=00:00:30.46 bitrate= 193.6kbits/s
video:0kB audio:711kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 1.262698%
Conversion failed!