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path: root/bin/loop+encode+stream
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  1. #!/bin/sh
  2. # TODO: Handle audio from secondary input
  3. set -e
  4. INPUT=../tmp/omni/show0/earth.yuv
  5. HOST=${1:-morla}
  6. if [ "$HOST" = "$(hostname --short)" ]; then
  7. IP=127.0.0.1
  8. else
  9. IP=$(host "$HOST" | grep -Po 'address \K\S+')
  10. fi
  11. FIRSTPORT=${2:-5002} # even number - next 3 ports used too
  12. ACHANNELS=2
  13. AFRAMERATE_OPUS=48000
  14. ABITRATE_OPUS=48000
  15. # TODO
  16. HEIGHT=360
  17. # TODO: Vary vpx quality based on height
  18. SPEED_VP8=15
  19. # inspired by Apple HLS recommendations
  20. if [ $HEIGHT -le 234 ]; then VBITRATE=145000;
  21. elif [ $HEIGHT -le 270 ]; then VBITRATE=365000;
  22. elif [ $HEIGHT -le 360 ]; then VBITRATE=730000;
  23. elif [ $HEIGHT -le 432 ]; then VBITRATE=1100000;
  24. elif [ $HEIGHT -le 540 ]; then VBITRATE=2000000;
  25. elif [ $HEIGHT -le 720 ]; then VBITRATE=3000000;
  26. fi
  27. # based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming
  28. # + Add 1s latency (deadline)
  29. # + Use same RTP payload types as GStreamer
  30. ffmpeg -hide_banner -threads auto -re \
  31. -stream_loop -1 -i "$INPUT" \
  32. -map '0:a' \
  33. -codec:a libopus -ac "$ACHANNELS" -ar "$AFRAMERATE_OPUS" -b:a "$ABITRATE_OPUS" \
  34. -f rtp -payload_type 111 "rtp://$IP:$FIRSTPORT?pkt_size=1200" \
  35. -map '0:v' \
  36. -pix_fmt yuv420p \
  37. -codec:v vp8 -quality realtime -deadline 1000000 -cpu-used "$SPEED_VP8" \
  38. -b:v "$VBITRATE" -minrate "$VBITRATE" -maxrate "$VBITRATE" \
  39. -undershoot-pct 95 -bufsize $((6000*VBITRATE/1000)) -rc_init_occupancy $((4000*VBITRATE/1000)) \
  40. -max-intra-rate 0 \
  41. -qmin 4 -qmax 56 \
  42. -f rtp -payload_type 100 "rtp://$IP:$((FIRSTPORT+2))?pkt_size=1200"