HLS to RTP multicast FFmpeg
It's not the best variant, but in my case it helped. I getting data with ffmpeg then routing output to vlc2 via pipe and transmitting it to rtp with the following command: 


  ffmpeg -re -i HLSstream -c copy -f mpegts - 2>/dev/null | vlc -
  --ttl=255 -I dummy --sout '#rtp{access=rtp,mux=ts,dst=IP,port=PORT}' :sout-all :sout-keep