Update 2024-02-14 07:51 OpenBSD/amd64-x13

.bin/OLD/fauxrec

@@ -0,0 +1,127 @@
+#!/bin/sh
+
+############
+# TODO:
+############
+# - audio format RAW possible? might be preferrable over WAV
+# - remove temporary files after muxing?
+# - test how far can push video size
+# - allow substituting aucat with custom other audio recording for portability?
+# - check if ffmpeg and aucat available in path
+# - if -m works, set muxflag=on as default
+# - don't set audiostream (-a flag) to snd/0.mon because not enabled by default?
+# - check with regex that format of -r (resolution) is correct? (shouldn't this
+#   be left to ffmpeg)
+# - test if position can be added to resolution (-r) argument? (like 640x480+48+48)
+# - add mention of $DISPLAY variable for the recording?
+# - AFAIK '-preset ultrafast' is specific to libx264 and needs to be disabled
+#   for use of other codecs
+# - get default framerate from xrandr? same for resolution - default to desktop
+#   resolution?
+# - mention need to stop recording with Ctrl-C??
+# - don't check for filename if -m (muxflag=off)
+# - add flag to skip recording and only mux (to adjust volume ratio, for example)
+# - add highpass=f=200,lowpass=f=3000
+# - HIGH PRIORITY: replace libfdk_aac!
+###########
+
+USAGE="Usage: `basename $0` [-m] [-r resolution] [-a stream] [-c codec] [-p path] [-f framerate] [-v0 volume_adjustment] [-v1 volume_adjustment] file"
+
+# Parse arguments based on http://www.shelldorado.com/goodcoding/cmdargs.html
+
+filename=
+resolution=
+audiostream=
+videocodec=
+streampath=
+volume1=
+volume2=
+framerate=
+muxflag=on
+hilopass=
+
+if [[ $# -eq 0 ]];then
+	echo $USAGE; exit 0
+fi
+
+while [[ $# -gt 0 ]]
+do
+	case "$1" in
+		-m) muxflag=off;;
+		-r) resolution="$2"; shift;;
+		-a) audiostream="$2"; shift;;
+		-c) videocodec="$2"; shift;;
+		-p) streampath="$2"; shift;;
+		-v0) volume0="$2"; shift;;
+		-v1) volume1="$2"; shift;;
+		-f) framerate="$2"; shift;;
+		-hl) hilopass=",highpass=f=200,lowpass=f=3000";;
+		-h) echo $USAGE; exit 0;;
+		-*) echo $USAGE; exit 0;;
+		*) filename="$1"; break;;
+	esac
+	shift
+done
+
+# set defaults if not specified in arguments
+if [[ -z "$streampath" ]];then
+	streampath="/tmp"
+fi
+if [[ -z "$resolution" ]];then
+	resolution=640x480
+fi
+if [[ -z "$framerate" ]];then
+	framerate=60
+fi
+# FIXME: find a way that -a not needed
+if [[ -z "$audiostream" ]];then
+	echo "IN DEVELOPMENT: -a argument needed at the moment (e.g. '-a snd/0.mon')"; exit 1
+fi
+if [[ -z "$videocodec" ]];then
+	videocodec=libx264
+fi
+if [[ -z "$filename" ]];then
+	echo $USAGE; exit 0
+fi
+if [[ -z "$volume0" ]];then
+	volume0=1.0
+fi
+if [[ -z "$volume1" ]];then
+	volume1=1.0
+fi
+
+# remove temp files in case they exist (from prior attempts)
+rm $streampath/fauxrec_{v0.mp4,a{0,1}.wav}
+
+# record the streams
+# 'sh -i' makes it so that the aucat and ffmpeg jobs receive SIGINT rather than
+# this running script
+sh -i -c "aucat -f snd/0 -o \"$streampath/fauxrec_a0.wav\" | \
+	aucat -f $audiostream -o \"$streampath/fauxrec_a1.wav\" | \
+	ffmpeg -f x11grab -video_size $resolution -framerate $framerate \
+	-i $DISPLAY -c:v $videocodec -preset ultrafast \
+	$streampath/fauxrec_v0.mp4"
+
+echo ""
+echo "*** Recording complete. ***"
+echo ""
+
+# multiplex the separate streams
+if [[ $muxflag = on ]];then
+	echo "Multiplexing streams to $filename..."
+	echo $hilopass
+	echo ""
+	ffmpeg -i "$streampath/fauxrec_v0.mp4" -i "$streampath/fauxrec_a0.wav" \
+		-i "$streampath/fauxrec_a1.wav" -filter_complex \
+		"[1]volume=$volume0,aformat=channel_layouts=stereo$hilopass[l];[2]volume=$volume1,aformat=channel_layouts=stereo[m];[l][m]amerge=inputs=2[a]" \
+		-map '0:v:0' -map '[a]' -c:v copy -c:a aac -q:a 2 -ac 2 \
+		$filename
+	if [[ $? -eq 0 ]];then
+		echo ""
+		echo "*** Multiplexing complete. ***"
+	else
+		echo ""
+		echo "*** Multiplexing failed. ***"
+	fi
+	echo ""
+fi