Use FFMPEG to generate MPD files for MPEG-DASH adaptive streaming

Question

So I am trying to setup adaptive streaming and I have what I think is 80-90% of the problem finished. Right now I ingest my source video, transcode it into 5 resolutions each with 3 bitrates (low, medium, high) and then I split all of those videos into 5 second chunks so that the user can always have the best viewing possible. Now I am at the point where I need to generate / create my MPD manifest file and I am having a hard time figuring out how. Almost everyone just says to use MP4Box but their license is too restrictive for my project.

Is there anyway to generate a MPD file using FFMPEG when I segment my video? or maybe generate a HLS that I can then convert into a MPD manifest? Any info would be awesome, this is my current FFMPEG command (working)

Note the $ variables are inputs into a bash script that set the input file, bitrate and scale.

/usr/bin/ffmpeg \
  -re \
  -i $1 \
  -an \
  -c:v libx264 \
  -b:v $7 \
  -b:a 196k \
  -strict -2 \
  -movflags faststart \
  -pix_fmt yuv420p \
  -vf "scale='$4:trunc(ow/a/2)*2'" \
  -flags -global_header \
  -map 0 \
  -f segment \
  -segment_time 5 \
  -segment_list test.m3u8 \
  -segment_format mpegts \
  $2%05d.mp4

Solution

ffmpeg \
  -f webm_dash_manifest -live 1 \
  -i /var/www/webm_live/glass_360.hdr \
  -f webm_dash_manifest -live 1 \
  -i /var/www/webm_live/glass_171.hdr \
  -c copy \
  -map 0 -map 1 \
  -f webm_dash_manifest -live 1 \
    -adaptation_sets "id=0,streams=0 id=1,streams=1" \
    -chunk_start_index 1 \
    -chunk_duration_ms 2000 \
    -time_shift_buffer_depth 7200 \
    -minimum_update_period 7200 \
  /var/www/webm_live/glass_live_manifest.mpd