ffmpeg -loglevel 40 -thread_queue_size 32768 -vsync 0 -async 100  -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:36563?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:43241?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:55257?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:36008?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:45589?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:58495?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:58182?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:49272?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:46846?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:35544?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:35188?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:42064?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:45835?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:34609?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:59823?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -deint 2 -thread_queue_size 32768 -vsync 0 -async 100 -i "udp://239.1.3.187:47452?fifo_size=100000000000&overrun_nonfatal=1&buffer_size=100000&analyzeduration=1000000" -filter_complex "nullsrc=size=1920x1080[base1];[0:v]fifo,setpts=PTS-STARTPTS[w0h0a];[1:v]fifo,setpts=PTS-STARTPTS[w1h0a];[2:v]fifo,setpts=PTS-STARTPTS[w2h0a];[3:v]fifo,setpts=PTS-STARTPTS[w3h0a];[4:v]fifo,setpts=PTS-STARTPTS[w4h0a];[5:v]fifo,setpts=PTS-STARTPTS[w5h0a];[6:v]fifo,setpts=PTS-STARTPTS[w6h0a];[7:v]fifo,setpts=PTS-STARTPTS[w7h0a];[8:v]fifo,setpts=PTS-STARTPTS[w8h0a];[9:v]fifo,setpts=PTS-STARTPTS[w9h0a];[10:v]fifo,setpts=PTS-STARTPTS[w10h0a];[11:v]fifo,setpts=PTS-STARTPTS[w11h0a];[12:v]fifo,setpts=PTS-STARTPTS[w12h0a];[13:v]fifo,setpts=PTS-STARTPTS[w13h0a];[14:v]fifo,setpts=PTS-STARTPTS[w14h0a];[15:v]fifo,setpts=PTS-STARTPTS[w15h0a];[base1][w0h0a]overlay=shortest=1:eval=0[tmp1];[tmp1][w1h0a]overlay=shortest=1:eval=0:x=480:y=0[tmp2];[tmp2][w2h0a]overlay=shortest=1:eval=0:x=960:y=0[tmp3];[tmp3][w3h0a]overlay=shortest=1:eval=0:x=1440:y=0[tmp4];[tmp4][w4h0a]overlay=shortest=1:eval=0:x=0:y=270[tmp5];[tmp5][w5h0a]overlay=shortest=1:eval=0:x=480:y=270[tmp6];[tmp6][w6h0a]overlay=shortest=1:eval=0:x=960:y=270[tmp7];[tmp7][w7h0a]overlay=shortest=1:eval=0:x=1440:y=270[tmp8];[tmp8][w8h0a]overlay=shortest=1:eval=0:x=0:y=540[tmp9];[tmp9][w9h0a]overlay=shortest=1:eval=0:x=480:y=540[tmp10];[tmp10][w10h0a]overlay=shortest=1:eval=0:x=960:y=540[tmp11];[tmp11][w11h0a]overlay=shortest=1:eval=0:x=1440:y=540[tmp12];[tmp12][w12h0a]overlay=shortest=1:eval=0:x=0:y=810[tmp13];[tmp13][w13h0a]overlay=shortest=1:eval=0:x=480:y=810[tmp14];[tmp14][w14h0a]overlay=shortest=1:eval=0:x=960:y=810[tmp15];[tmp15][w15h0a]overlay=shortest=1:eval=0:x=1440:y=810" -vcodec h264 -vsync 0 -async 1 -threads 0 -profile:v main -level 4 -preset medium -tune grain -b:v 10000k -bufsize 4000k -minrate 8000k -maxrate 12000k -an -flush_packets 0 -keyint_min 25 -g 25 -metadata service_provider=Nextologies -metadata service_name=MultiScreenTest -f mpegts -mpegts_flags +resend_headers+pat_pmt_at_frames -pcr_period 10 -y "udp://239.1.3.187:1234?pkt_size=1316&reuse=1&buffer_size=1000000&fifo_size=100000000&burst_bits=2500000"