Rename captureDVCAM+edit+encode+stream → stream.

1 files changed, 92 insertions, 0 deletions

diff --git a/bin/stream b/bin/stream
new file mode 100755
index 0000000..0e99129
--- /dev/null
+++ b/bin/stream
@@ -0,0 +1,92 @@
+#!/bin/sh
+
+set -e
+
+# TODO: Externalize to site-specific configfile
+[ $# -gt 0 ] || set -- morla 5002 -- dvcam ../../content/icon_small.png
+
+exit1() {
+	echo >&2 "ERROR: $1"
+	exit 1
+}
+
+while [ $# -gt 0 ]; do
+	case $1 in
+	  --)
+		shift; break;;
+	  *)
+		if [ -z "$HOST" ]; then
+			HOST=$1
+		elif [ -z "$FIRSTPORT" ]; then
+			FIRSTPORT=$1
+		else
+			exit1 "Too many arguments: Max. 2 about target"
+		fi
+		;;
+	esac
+	shift
+done
+
+# TODO: Externalize to site-specific configfile
+[ $# -gt 0 ] || set -- dvcam ../../content/icon_small.png
+
+while [ $# -gt 0 ]; do
+	case $1 in
+		alsa=*) ALSA=${1#*=}; AINPUT=$((AINPUT+1));;
+		alsa) ALSA=default; AINPUT=$((AINPUT+1));;
+		dvcam=*) DVCAM=${1#*=}; XINPUT=$((XINPUT+1));;
+		dvcam) DVCAM=auto; XINPUT=$((XINPUT+1));;
+		*.png) LOGO=$1; WINPUT=$((WINPUT+1));;
+		--) shift; break;;
+		*) exit1 "Unsupported input: $1";;
+	esac
+	shift
+done
+
+HOST=${HOST:-127.0.0.1}
+if [ "$HOST" = "$(hostname --short)" ]; then
+	IP=127.0.0.1
+else
+	IP=$(host "$HOST" | grep -Po 'address \K\S+')
+fi
+
+[ -n "$AINPUT$VINPUT$XINPUT" ] || exit1 "Too few arguments: Min. 1 A/V source"
+[ -z "$AINPUT" ] || [ -z "$VINPUT" ] || [ -z "$XINPUT" ] || exit1 "Too many arguments: Max. 2 A/V sources"
+[ -z "$AINPUT" ] || [ $AINPUT -eq 1 ] || exit1 "Too many arguments: Max. 1 audio source"
+[ -z "$VINPUT" ] || [ $VINPUT -eq 1 ] || exit1 "Too many arguments: Max. 1 video source"
+[ -z "$WINPUT" ] || [ $WINPUT -eq 1 ] || exit1 "Too many arguments: Max. 1 watermark source"
+[ -z "$XINPUT" ] || [ $XINPUT -eq 1 ] || exit1 "Too many arguments: Max. 1 multimedia source"
+VSTREAMINDEX=1
+[ -n "$AINPUT" ] || VSTREAMINDEX=0
+
+FIRSTPORT=${FIRSTPORT:-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 \
+ ${ALSA:+-f alsa -sample_rate "$AFRAMERATE" -channels "$ACHANNELS" -thread_queue_size 1024 -i "$ALSA"} \
+ ${DVCAM:+-f iec61883 -i $DVCAM} \
+ ${LOGO:+-i "$LOGO"} \
+ -filter_complex \
+ "[$VSTREAMINDEX:v]scale=-1:$HEIGHT[bg]${LOGO:+;
+  [bg][$((VSTREAMINDEX+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"