Converting DTS/BluRay with FFmpeg

$ ffmpeg -i video.mkv
Stream #0:0(eng): Video: h264 (High), yuv420p, 1280x536, SAR 1:1 DAR 160:67, 23.98 fps, 23.98 tbr, 1k tbn, 47.95 tbc (default)
    Metadata:
      title           : Video Title
    Stream #0:1(eng): Audio: dts (DTS), 48000 Hz, 5.1(side), fltp, 1536 kb/s (default)
    Metadata:
      title           : DTS 5.1 1.5 Mbps
    Stream #0:2(eng): Subtitle: subrip

# AppleTV doesn't support DTS so we output AAC (2ch) and AC3 (5.1)
$ ffmpeg -i video.mkv -i video.mkv \
  -map 0:0 -c:v:0 copy \
  -map 0:1 -ac:1 2 -c:a:0 libfdk_aac \
  -map 1:1 -c:a:1 ac3 video.m4v