blob: b21eae90371e57b9feb50d1130ab50020620cf87 (
plain)
- #!/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=${3-0} # endless by default
- HEIGHT=360
- VBITRATE=500000
- MOVIE=../src/omni/show0/earth.mp4
- LOGO=../../content/icon_small.png
- # based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming
- # + loop-in-filter trick based on http://video.stackexchange.com/a/16933
- # + scale+watermark trick based on http://stackoverflow.com/a/10937357
- # + Drop frames, aggressively treat as static, and use fastest cpu
- ffmpeg -threads auto -re \
- -f lavfi -i "movie=filename=$MOVIE:loop=$ITERATIONS, setpts=N/(FRAME_RATE*TB)" \
- -i "$LOGO" \
- -filter_complex \
- "[0:v]scale=-1:$HEIGHT[bg];
- [bg][1:v]overlay=main_w-overlay_w-20:main_h-overlay_h-20" \
- -an \
- -codec:v vp8 -quality realtime -deadline realtime -cpu-used 15 \
- -b:v "$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"
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