$ ./ffmpeg -c:a libdcadec -libdcadec_flags core -i lotr.dts -f null -
ffmpeg version N-71042-g83020f8 Copyright (c) 2000-2015 the FFmpeg developers
  built with gcc 4.9.2 (Rev4, Built by MSYS2 project)
  configuration: --enable-gpl --enable-nonfree --enable-libfdk-aac --enable-libdcadec --enable-libopus --enable-libvorbis --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-openssl --target-os=mingw32 --arch=x86_64 --cc='ccache cc' --extra-cflags='-D_WIN32_WINNT=0x0600' --prefix=/mingw64
  libavutil      54. 20.100 / 54. 20.100
  libavcodec     56. 29.100 / 56. 29.100
  libavformat    56. 26.101 / 56. 26.101
  libavdevice    56.  4.100 / 56.  4.100
  libavfilter     5. 13.101 /  5. 13.101
  libswscale      3.  1.101 /  3.  1.101
  libswresample   1.  1.100 /  1.  1.100
  libpostproc    53.  3.100 / 53.  3.100
Input #0, dts, from 'lotr.dts':
  Duration: N/A, start: 0.000000, bitrate: N/A
    Stream #0:0: Audio: dts (DTS-HD MA), 48000 Hz, 6.1, s32p (24 bit)
Output #0, null, to 'pipe:':
  Metadata:
    encoder         : Lavf56.26.101
    Stream #0:0: Audio: pcm_s16le, 48000 Hz, 6.1, s16 (24 bit), 5376 kb/s
    Metadata:
      encoder         : Lavc56.29.100 pcm_s16le
Stream mapping:
  Stream #0:0 -> #0:0 (dts (libdcadec) -> pcm_s16le (native))
Press [q] to stop, [?] for help
Input stream #0:0 frame changed from rate:48000 fmt:s32p ch:7 chl:6.1 to rate:48000 fmt:s32p ch:6 chl:5.1(side)
size=N/A time=00:01:21.37 bitrate=N/A
video:0kB audio:53403kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknown