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path: root/bin/decode+edit+loop+encode+stream
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  1. #!/bin/sh
  2. # FIXME: Handle audio track in main input
  3. # TODO: Handle audio as secondary input
  4. set -e
  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. ITERATIONS=${3-0} # endless by default
  13. HEIGHT=360
  14. VBITRATE=500000
  15. MOVIE=../src/omni/show0/earth.mp4
  16. LOGO=../../content/icon_small.png
  17. # based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming
  18. # + loop-in-filter trick based on http://video.stackexchange.com/a/16933
  19. # + scale+watermark trick based on http://stackoverflow.com/a/10937357
  20. # + Drop frames, aggressively treat as static, and use fastest cpu
  21. ffmpeg -threads auto -re \
  22. -f lavfi -i "movie=filename=$MOVIE:loop=$ITERATIONS, setpts=N/(FRAME_RATE*TB)" \
  23. -i "$LOGO" \
  24. -filter_complex \
  25. "[0:v]scale=-1:$HEIGHT[bg];
  26. [bg][1:v]overlay=main_w-overlay_w-20:main_h-overlay_h-20" \
  27. -an \
  28. -codec:v vp8 -quality realtime -deadline realtime -cpu-used 15 \
  29. -b:v "$VBITRATE" -minrate "$VBITRATE" -maxrate "$VBITRATE" \
  30. -undershoot-pct 95 -bufsize $((6000*VBITRATE/1000)) -rc_init_occupancy $((4000*VBITRATE/1000)) \
  31. -max-intra-rate 0 \
  32. -qmin 4 -qmax 56 \
  33. -static-thresh 500 -skip_threshold 50 \
  34. -f rtp "rtp://$IP:$((FIRSTPORT+2))?pkt_size=1200"