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