bin/loop+encode+stream



#!/bin/sh

# TODO: Handle audio from secondary input

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

ABITRATE=64000

VBITRATE=500000

TMPMOVIE=../tmp/omni/show0/earth.yuv

# based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming
# + Drop frames, aggressively treat as static, and use fastest cpu
ffmpeg -threads auto -re \
 -stream_loop -1 -i "$TMPMOVIE" \
 -codec:a libopus -ac 2 -b:a "$ABITRATE" -ar 48000 \
 -vn \
 -f rtp "rtp://$IP:$FIRSTPORT?pkt_size=1200" \
 -an \
 -codec:v vp8 -quality realtime -deadline realtime -cpu-used 15 \
 -b:v "$VBITRATE" -minrate "$VBITRATE" -maxrate "$VBITRATE" \
 -undershoot-pct 95 -bufsize $((6000*VBITRATE/1000)) -rc_init_occupancy $((4000*VBITRATE/1000)) \
 -max-intra-rate 0 \
 -qmin 4 -qmax 56 \
 -static-thresh 500 -skip_threshold 50 \
 -f rtp "rtp://$IP:$((FIRSTPORT+2))?pkt_size=1200"