DEA.L. Speex (decoders: libspeex ) (encoders: libspeex ) <-- I have libspeex compiled with FFmpeg :b



$ ffmpeg -i '/home/pandela/Music/Sauce/MoonlightSonata_64kb.mp3' -f wav -acodec libspeex -y Speex.wav
ffmpeg version 3.3 Copyright (c) 2000-2017 the FFmpeg developers
  built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.4) 20160609
  configuration: --enable-gpl --enable-libass --enable-libfreetype --enable-libmp3lame --enable-libtheora --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-nonfree --enable-gnutls --enable-ladspa --enable-libxavs --enable-libpulse --enable-librubberband --enable-libshine --enable-libflite --enable-libspeex --enable-libvo-amrwbenc --enable-libsnappy --enable-libwebp --enable-version3 --enable-encoder=libx262
  libavutil      55. 58.100 / 55. 58.100
  libavcodec     57. 89.100 / 57. 89.100
  libavformat    57. 71.100 / 57. 71.100
  libavdevice    57.  6.100 / 57.  6.100
  libavfilter     6. 82.100 /  6. 82.100
  libswscale      4.  6.100 /  4.  6.100
  libswresample   2.  7.100 /  2.  7.100
  libpostproc    54.  5.100 / 54.  5.100
Input #0, mp3, from '/home/pandela/Music/Sauce/MoonlightSonata_64kb.mp3':
  Metadata:
    title           : Moonlight Sonata
  Duration: 00:06:04.77, start: 0.050113, bitrate: 64 kb/s
    Stream #0:0: Audio: mp3, 22050 Hz, stereo, s16p, 64 kb/s
    Metadata:
      encoder         : LAME3.97 
    Side data:
      replaygain: track gain - 5.500000, track peak - unknown, album gain - unknown, album peak - unknown, 
Stream mapping:
  Stream #0:0 -> #0:0 (mp3 (native) -> speex (libspeex))
Press [q] to stop, [?] for help
Output #0, wav, to 'Speex.wav':
  Metadata:
    INAM            : Moonlight Sonata
    ISFT            : Lavf57.71.100
    Stream #0:0: Audio: speex (libspeex) ([9][161][0][0] / 0xA109), 16000 Hz, stereo, s16, 28 kb/s
    Metadata:
      encoder         : Lavc57.89.100 libspeex
    Side data:
      replaygain: track gain - 5.500000, track peak - unknown, album gain - unknown, album peak - unknown, 
size=    1282kB time=00:06:04.69 bitrate=  28.8kbits/s speed=78.4x    
video:0kB audio:1282kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 0.015081%
[libspeex @ 0x3262c20] 1 frames left in the queue on closing




FFplay -acodec libspeex -i Speex.wav

Stream #0:0: Audio: speex ([9][161][0][0] / 0xA109), 16000 Hz, 2 channels, 28 kb/s
No codec could be found with name 'libspeex'
Failed to open file 'Speex.wav' or configure filtergraph
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0 



FFplay -i Speex.wav

Stream #0:0: Audio: speex ([9][161][0][0] / 0xA109), 16000 Hz, 2 channels, 28 kb/s
No codec could be found with id 86052
Failed to open file 'Speex.wav' or configure filtergraph
    nan    :  0.000 fd=   0 aq=    0KB vq=    0KB sq=    0B f=0/0