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  1. #!/bin/sh
  2. set -e
  3. # TODO: Externalize to site-specific configfile
  4. [ $# -gt 0 ] || set -- morla 5002 -- dvcam ../../content/icon_small.png
  5. exit1() {
  6. echo >&2 "ERROR: $1"
  7. exit 1
  8. }
  9. while [ $# -gt 0 ]; do
  10. case $1 in
  11. --)
  12. shift; break;;
  13. *)
  14. if [ -z "$HOST" ]; then
  15. HOST=$1
  16. elif [ -z "$FIRSTPORT" ]; then
  17. FIRSTPORT=$1
  18. else
  19. exit1 "Too many arguments: Max. 2 about target"
  20. fi
  21. ;;
  22. esac
  23. shift
  24. done
  25. # TODO: Externalize to site-specific configfile
  26. [ $# -gt 0 ] || set -- dvcam ../../content/icon_small.png
  27. while [ $# -gt 0 ]; do
  28. case $1 in
  29. alsa=*) ALSA=${1#*=}; AINPUT=$((AINPUT+1));;
  30. alsa) ALSA=default; AINPUT=$((AINPUT+1));;
  31. dvcam=*) DVCAM=${1#*=}; XINPUT=$((XINPUT+1));;
  32. dvcam) DVCAM=auto; XINPUT=$((XINPUT+1));;
  33. *.png) LOGO=$1; WINPUT=$((WINPUT+1));;
  34. --) shift; break;;
  35. *) exit1 "Unsupported input: $1";;
  36. esac
  37. shift
  38. done
  39. HOST=${HOST:-127.0.0.1}
  40. if [ "$HOST" = "$(hostname --short)" ]; then
  41. IP=127.0.0.1
  42. else
  43. IP=$(host "$HOST" | grep -Po 'address \K\S+')
  44. fi
  45. [ -n "$AINPUT$VINPUT$XINPUT" ] || exit1 "Too few arguments: Min. 1 A/V source"
  46. [ -z "$AINPUT" ] || [ -z "$VINPUT" ] || [ -z "$XINPUT" ] || exit1 "Too many arguments: Max. 2 A/V sources"
  47. [ -z "$AINPUT" ] || [ $AINPUT -eq 1 ] || exit1 "Too many arguments: Max. 1 audio source"
  48. [ -z "$VINPUT" ] || [ $VINPUT -eq 1 ] || exit1 "Too many arguments: Max. 1 video source"
  49. [ -z "$WINPUT" ] || [ $WINPUT -eq 1 ] || exit1 "Too many arguments: Max. 1 watermark source"
  50. [ -z "$XINPUT" ] || [ $XINPUT -eq 1 ] || exit1 "Too many arguments: Max. 1 multimedia source"
  51. VSTREAMINDEX=1
  52. [ -n "$AINPUT" ] || VSTREAMINDEX=0
  53. FIRSTPORT=${FIRSTPORT:-5002} # even number - next 3 ports used too
  54. ACHANNELS=2
  55. AFRAMERATE=48000
  56. ABITRATE=32000
  57. HEIGHT=360
  58. VBITRATE=256000
  59. # based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming
  60. # + scale+watermark trick based on http://stackoverflow.com/a/10937357
  61. # + Add 1s latency (deadline)
  62. # + Use same RTP payload types as GStreamer
  63. ffmpeg -hide_banner -threads auto -re \
  64. ${ALSA:+-f alsa -sample_rate "$AFRAMERATE" -channels "$ACHANNELS" -thread_queue_size 1024 -i "$ALSA"} \
  65. ${DVCAM:+-f iec61883 -i $DVCAM} \
  66. ${LOGO:+-i "$LOGO"} \
  67. -filter_complex \
  68. "[$VSTREAMINDEX:v]scale=-1:$HEIGHT[bg]${LOGO:+;
  69. [bg][$((VSTREAMINDEX+1)):v]overlay=main_w-overlay_w-20:main_h-overlay_h-20[v]}" \
  70. -map '0:a' \
  71. -codec:a libopus -ac "$ACHANNELS" -ar "$AFRAMERATE" -b:a "$ABITRATE" \
  72. -f rtp -payload_type 111 "rtp://$IP:$FIRSTPORT?pkt_size=1200" \
  73. -map '[v]' \
  74. -pix_fmt yuv420p \
  75. -codec:v vp8 -quality realtime -deadline 1000000 -cpu-used 15 \
  76. -b:v "$VBITRATE" -minrate "$VBITRATE" -maxrate "$VBITRATE" \
  77. -undershoot-pct 95 -bufsize $((6000*VBITRATE/1000)) -rc_init_occupancy $((4000*VBITRATE/1000)) \
  78. -max-intra-rate 0 \
  79. -qmin 4 -qmax 56 \
  80. -f rtp -payload_type 100 "rtp://$IP:$((FIRSTPORT+2))?pkt_size=1200"