#!/bin/sh set -e HOST=${1:-morla} if [ "$HOST" = "$(hostname --short)" ]; then IP=127.0.0.1 else IP=$(host "$HOST" | grep -Po 'address \K\S+') fi FIRSTPORT=${2:-5002} # even number - next 3 ports used too ITERATIONS=${3-0} # endless by default HEIGHT=360 BITRATE=500000 MOVIE=../src/omni/show0/earth.mp4 LOGO=../../content/icon_small.png # based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming # + loop-in-filter trick based on http://video.stackexchange.com/a/16933 # + Drop frames, aggressively treat as static, and use fastest cpu ffmpeg -threads auto -re \ -f lavfi -i "movie=filename=$MOVIE:loop=$ITERATIONS, setpts=N/(FRAME_RATE*TB), scale=-1:$HEIGHT" \ -i "$LOGO" -filter_complex 'overlay=main_w-overlay_w-20:main_h-overlay_h-20' \ -an \ -codec:v vp8 -quality realtime -deadline realtime -cpu-used 15 \ -b:v "$BITRATE" -minrate "$BITRATE" -maxrate "$BITRATE" \ -undershoot-pct 95 -bufsize $((6000*BITRATE/1000)) -rc_init_occupancy $((4000*BITRATE/1000)) \ -max-intra-rate 0 \ -qmin 4 -qmax 56 \ -static-thresh 500 -skip_threshold 50 \ -f rtp "rtp://$IP:$((FIRSTPORT+2))?pkt_size=1200"