blob: 4bf2e4dd0ce5f7427de676e6731b010c06bd0391 (
plain)
- #!/bin/sh
- set -e
- AINPUT=hw:0
- VINPUT=/dev/fw1
- LOGO=../../content/icon_small.png
- 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
- ACHANNELS=2
- AFRAMERATE=48000
- ABITRATE=32000
- HEIGHT=360
- VBITRATE=256000
- # based on http://www.webmproject.org/docs/encoder-parameters/#real-time-cbr-encoding-and-streaming
- # + scale+watermark trick based on http://stackoverflow.com/a/10937357
- # + Add 1s latency (deadline)
- # + Use same RTP payload types as GStreamer
- ffmpeg -hide_banner -threads auto -re \
- -f iec61883 -i auto \
- -i "$LOGO" \
- -filter_complex \
- "[0:v]scale=-1:$HEIGHT[bg];
- [bg][1:v]overlay=main_w-overlay_w-20:main_h-overlay_h-20[v]" \
- -map '0:a' \
- -codec:a libopus -ac "$ACHANNELS" -ar "$AFRAMERATE" -b:a "$ABITRATE" \
- -f rtp -payload_type 111 "rtp://$IP:$FIRSTPORT?pkt_size=1200" \
- -map '[v]' \
- -pix_fmt yuv420p \
- -codec:v vp8 -quality realtime -deadline 1000000 -cpu-used 15 \
- -b:v "$VBITRATE" -minrate "$VBITRATE" -maxrate "$VBITRATE" \
- -undershoot-pct 95 -bufsize $((6000*VBITRATE/1000)) -rc_init_occupancy $((4000*VBITRATE/1000)) \
- -max-intra-rate 0 \
- -qmin 4 -qmax 56 \
- -f rtp -payload_type 100 "rtp://$IP:$((FIRSTPORT+2))?pkt_size=1200"
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