# ffs = ffmpeg stream
-# todo: learn to start working in one corner of the screen.
-
-# potential improvement: it might be nice that we could have a tall terminal bug only use
+# potential improvement: it might be nice that we could have a tall terminal but only use
# the top half for a 1080p stream, this is how:
# https://superuser.com/questions/1106674/how-to-add-blank-lines-above-the-bottom-in-terminal
-#
-# potential improvement: sometimes I probably want to stream full height
-# window. I could add an option for that.
-
-# potential improvement: setup a function which automatically mutes after some time, or
-# after some time of no audio input.
-
-
-### begin background/development docs ###
-
-# zmq vs stdin commands:
-#
-# * zmq allows targeting a specific filter when there are duplicates.
-#
-# * if you type stdin command too slow, ffmpeg will die because it stops
-# doing normal work while it is waiting.
-#
-# * zmq returns a result to the calling process, rather than printing to
-# stdout.
-#
-# * the only simple zmq tool I found, zmqsend, requires compiling. I
-# used the latest ffmpeg 7.0.1. Build like so:
-#
-# p build-dep ffmpeg/aramo
-# ./configure --enable-libzmq # i already had libzmq3-dev installed
-# make alltools
-# cp tools/zmqsend /a/opt/bin
-#
-# * ffmpeg debug output was useful in testing zmq commands.
-#
-# * Important documentation for stdin commands is only found by typing
-# "c" into the stdin of ffmpeg and reading the output.
-#
-#
-#
-# stdin command docs, before I abandoned it for zmq:
-# mkfifo -m 0600 /tmp/iank-ffmpeg
-# # ffmpeg sits and waits until we do this. dunno why.
-# echo >/tmp/iank-ffmpeg &
-# ffmpeg ... </tmp/iank-ffmpeg |& while read -r line; do : check results; done
-# # example of working commands:
-# echo "cdrawbox -1 t 0" >/tmp/iank-ffmpeg
-# echo "cdrawbox -1 t fill" >/tmp/iank-ffmpeg
-# echo "cdrawtext -1 reinit text=''" >/tmp/iank-ffmpeg
-# echo "cvolume -1 volume=1" >/tmp/iank-ffmpeg
-
-
-# For testing: to show the number of audio channels in a resulting file
-# https://stackoverflow.com/questions/47905083/how-to-check-number-of-channels-in-my-audio-wav-file-using-ffmpeg-command
-#
-# ffprobe -i /tmp/out.wav -show_entries stream=channels -select_streams a:0 -of compact=p=0:nk=1 -v 0
-
-# for a right/left speaker test:
-# https://askubuntu.com/questions/148363/which-linux-command-can-i-use-to-test-my-speakers-for-current-talk-radio-output
-# p install alsa-utils
-# speaker-test -t wav -c 2 -l 1
-
-# There are 2 other options for audio, so I wanted to do a little
-# performance measurement of this method.
-# 1 is to combine the 2 audio sources in pulse,
-# https://unix.stackexchange.com/questions/351764/create-combined-source-in-pulseaudio .
-# 1 is to record mumble and combine in post processing.
-
-### benchmark / perf tests: these are pretty inaccurate.
-# 29 seconds cpu use. video bitrate 1500k, 8 fps, 2x keyframe interval.
-# * 64k vorbis: 69.7%
-# * 128k vorbis: 70.1% (used in subsequent tests)
-# * 1 audio input: 64.3%
-# * 0 audio inputs: 59.2%
-
-# how I did perf testing: add -to 00:00:30 to ffmpeg opts to
-# conveniently exit after measurement. Then run:
-#
-# ffmpeg "${opts[@]}" &
-# pid=$!
-# sleep 29
-# ps -p $pid -o %cpu
-# kill %%
-
-# filter for only 1 audio input:
-#-filter_complex "[0]azmq,volume=precision=fixed;[1]zmq='b=tcp\://127.0.0.1\:5557',drawbox=color=0x262626,drawtext=fontsize=90: fontcolor=beige: x=40: y=40: text=''"
-# filter with 0 audio input:
-# -filter_complex "[0]zmq='b=tcp\://127.0.0.1\:5557',drawbox=color=0x262626,drawtext=fontsize=90: fontcolor=beige: x=40: y=40: text=''"
-
-
-# When things weren't working, I did some checking on newer ffmpeg to
-# see if that helped. It never did. I compiled the latest ffmpeg release
-# tarball, 7.0.1, and tried the version in debian bullseye by schrooting
-# before running ffmpeg. Building was just configure; make, but then I
-# found some flags that were needed. gpl flags r just because I noticed them.
-# ./configure --enable-libzmq --enable-libpulse --enable-libvorbis --enable-gpl --enable-version3
-#
-
-### end background/development docs ###
if ! test "$BASH_VERSION"; then echo "error: shell is not bash" >&2; exit 1; fi
usage() {
cat <<EOF
-Usage: ${0##*/} [OPTIONS] [sysops|tech|staff]
-3 mountpoints: fsf-sysops (default, public), fsf (all staff), fsf-tech (tech team)
+Usage: ${0##*/} [OPTIONS] [sysops|tech|staff|test]
+
+arg is icecast mountpoint suffix, except staff removes suffix.
-d debug.
--f Stream full screen even high resolution.
--t Stream tall half screen
+-r RESOLUTION_TYPE
+ full: full screen even high resolution.
+ tall (default): half screen.
+ quarter: self evident
+-l loud/listen. Start unmuted. Usually for testing.
-u Undelayed. Removes 5 second video delay, and about 4 second audio delay.
-w do not launch watch of stream
delay=true
loglevel=fatal
watch=true
+volume=0
fullscreen=false
-tall=false
-temp=$(getopt -l help hdftuw "$@") || usage 1
+tall=true
+temp=$(getopt -l help hdlr:uw "$@") || usage 1
eval set -- "$temp"
while true; do
case $1 in
loglevel=info
ffp_args+=(-d)
;;
- -f)
- fullscreen=true
- tall=false
+ -l)
+ volume=1
;;
- -t)
- fullscreen=false
- tall=true
+ -r)
+ case $2 in
+ tall)
+ fullscreen=false
+ tall=true
+ ;;
+ quarter)
+ fullscreen=false
+ tall=false
+ ;;
+ full)
+ fullscreen=true
+ tall=false
+ ;;
+ esac
+ shift
;;
-w)
watch=false
done
mount_suffix=-sysops
-case $1 in
- sysops|tech)
- mount_suffix=-$1
- ;;&
- tech)
- delay=false
- ;;
- staff)
- mount_suffix=
- ;;
-esac
+if [[ $1 ]]; then
+ case $1 in
+ sysops|tech)
+ mount_suffix=-$1
+ ;;&
+ tech)
+ delay=false
+ ;;
+ staff)
+ mount_suffix=
+ ;;
+ *)
+ echo "error: unexpected \$1: $1" >&2
+ exit 1
+ ;;
+ esac
+ ffp_args+=($1)
+fi
if $delay; then
# 2500 gets us around a 4 second delay, up from 1.5s.
##### end command line parsing ########
-host=live.iankelling.org:8000
-if ip n show 10.2.0.1 | grep . &>/dev/null && \
- [[ $(dig +timeout=1 +short @10.2.0.1 -x 10.2.0.2 2>&1 ||:) == kd.b8.nz. ]]; then
+host=live.iankelling.org:8443
+live_host=$(dig +timeout=1 +short @iankelling.org live.iankelling.org)
+vps_host=$(dig +timeout=1 +short iankelling.org)
+if [[ $live_host != "$vps_host" ]] && ip n show 10.2.0.1 | grep . &>/dev/null && \
+ [[ $(dig +timeout=1 +short @10.2.0.1 -x 10.2.0.2 2>&1 ||:) == kd.b8.nz. ]]; then
host=127.0.0.1:8000
+ if ! pgrep '^icecast2$' >/dev/null; then
+ sudo systemctl start icecast2
+ fi
+else
+ find_prefix="ssh live.iankelling.org"
fi
+if $find_prefix find /var/icecast -type f | grep .; then
+ echo "warning: suggest clearing /var/icecast with icrmr or moving files. sleeping for 4 seconds"
+ sleep 4
+fi
+
+
pass=$(sed -n 's/ *<source-password>\([^<]*\).*/\1/p' /p/c/icecast.xml)
stream_res=$primary_res
fi
-framerate=8
+stream_x=${stream_res%x*}
+stream_y=${stream_res#*x}
+
+# leave out our i3 window borders
+stream_res=$(( stream_x - 4 ))x$(( stream_y - 4))
+
+
+# if hardware acceleration exists, use it to save power & cpu.
+if vainfo |& grep -i VAProfileVP9Profile &>/dev/null; then
+ # 1500 seems almost flawless
+ bitrate_1080=1500
+
+ encode_settings=(
+ -c:v vp9_vaapi
+ # these options increase compression based on random internet reference.
+ -bsf:v vp9_raw_reorder,vp9_superframe
+ )
+ # https://trac.ffmpeg.org/wiki/Hardware/VAAPI
+ global_extra_args=(
+ -vaapi_device /dev/dri/renderD128
+ )
+ extra_filter_arg=",format=nv12|vaapi,hwupload"
+else
+ # 1000 is a bit blury, 1500 is pretty clear, 2000 makes scrolling
+ # adjust much faster, 2500 has marginal improvement on that.
+ #
+ # note https://livekit.io/webrtc/bitrate-guide (our framerate is lower)
+ bitrate_1080=2000
+
+ encode_settings=(
+ -vcodec libvpx
+ -quality realtime
+ -error-resilient 1
+ )
+fi
+
+bitrate=$(( ( stream_x * stream_y ) / ( (1920*1080) / bitrate_1080 ) ))
+
+
+# 8 seems fine. be conservative by going a bit higher.
+framerate=10
keyframe_interval=$((framerate * 2))
# Monitor of default sink.
-hide_banner
-nostats
+ ${global_extra_args[@]}
+
# tested for decreasing latency: did not help.
# -probesize 32
# tested for warning "Queue input is backward in time". did not help.
#
# man page say zmq url default includes "localhost", but specifying a
# localhost url caused an error for me.
- -filter_complex "[0]azmq,volume=precision=fixed: volume=0 [vol0];
+ -filter_complex "[0]azmq,volume=precision=fixed: volume=$volume [vol0];
[1]azmq='b=tcp\://127.0.0.1\:5556',volume=precision=fixed: volume=0 [vol1];
[vol0][vol1] amerge=inputs=2;
-[2]zmq='b=tcp\://127.0.0.1\:5557',drawbox=color=0x262626,drawtext=fontsize=90: fontcolor=beige: x=40: y=40: text=''${delay_arg}[out]"
-
-# [vol0][vol1] amerge=inputs=2,adelay=6000:all=1;
-
+[2]zmq='b=tcp\://127.0.0.1\:5557',drawbox=color=0x262626,drawtext=fontsize=90: fontcolor=beige: x=40: y=40: text=''${delay_arg}${extra_filter_arg}[out]"
# An online source says to match a 5 second vid delay, we can do an
# audio delay filter: "adelay=5000|5000". However, we already get
-map '[out]'
# video output options
- -vcodec libvpx
-g $keyframe_interval
- -quality realtime
- # for 1080p, default 256k is poor quality. 500 is ok. 1500 is a bit better.
- -b:v 1500k
- -threads 2
- -error-resilient 1
+ ${encode_settings[@]}
+ -b:v ${bitrate}k
+
## audio output options
-c:a libvorbis
rm -f /tmp/iank-ffmpeg-interlude-toggle
-# start muted
-pactl set-source-mute @DEFAULT_SOURCE@ true
+# system mute. disabled, just using application level mute atm.
+#
+# pactl set-source-mute @DEFAULT_SOURCE@ true
if pkill -f ^ffmpeg.\*icecast://source.\*/fsf; then
sleep 1
fi
-#echo executing: ffmpeg ${opts[@]}
+echo executing: ffmpeg ${opts[@]}
#{ sleep 1; ffp &>/dev/null & }
touch $HOME/.iank-stream-on
fi
-echo true >$HOME/.iank-stream-muted
+echo $volume >$HOME/.iank-stream-muted
ffmpeg "${opts[@]}" &
if $watch; then
kill %%
rm -f $HOME/.iank-stream-on
fi
+
+### begin background/development docs ###
+
+# zmq vs stdin commands:
+#
+# * zmq allows targeting a specific filter when there are duplicates.
+#
+# * if you type stdin command too slow, ffmpeg will die because it stops
+# doing normal work while it is waiting.
+#
+# * zmq returns a result to the calling process, rather than printing to
+# stdout.
+#
+# * the only simple zmq tool I found, zmqsend, requires compiling. I
+# used the latest ffmpeg 7.0.1. Build like so:
+#
+# p build-dep ffmpeg/aramo
+# ./configure --enable-libzmq # i already had libzmq3-dev installed
+# make alltools
+# cp tools/zmqsend /a/opt/bin
+#
+# * ffmpeg debug output was useful in testing zmq commands.
+#
+# * Important documentation for stdin commands is only found by typing
+# "c" into the stdin of ffmpeg and reading the output.
+#
+#
+#
+# stdin command docs, before I abandoned it for zmq:
+# mkfifo -m 0600 /tmp/iank-ffmpeg
+# # ffmpeg sits and waits until we do this. dunno why.
+# echo >/tmp/iank-ffmpeg &
+# ffmpeg ... </tmp/iank-ffmpeg |& while read -r line; do : check results; done
+# # example of working commands:
+# echo "cdrawbox -1 t 0" >/tmp/iank-ffmpeg
+# echo "cdrawbox -1 t fill" >/tmp/iank-ffmpeg
+# echo "cdrawtext -1 reinit text=''" >/tmp/iank-ffmpeg
+# echo "cvolume -1 volume=1" >/tmp/iank-ffmpeg
+
+
+# For testing: to show the number of audio channels in a resulting file
+# https://stackoverflow.com/questions/47905083/how-to-check-number-of-channels-in-my-audio-wav-file-using-ffmpeg-command
+#
+# ffprobe -i /tmp/out.wav -show_entries stream=channels -select_streams a:0 -of compact=p=0:nk=1 -v 0
+
+# for a right/left speaker test:
+# https://askubuntu.com/questions/148363/which-linux-command-can-i-use-to-test-my-speakers-for-current-talk-radio-output
+# p install alsa-utils
+# speaker-test -t wav -c 2 -l 1
+
+# There are 2 other options for audio, so I wanted to do a little
+# performance measurement of this method.
+# 1 is to combine the 2 audio sources in pulse,
+# https://unix.stackexchange.com/questions/351764/create-combined-source-in-pulseaudio .
+# 1 is to record mumble and combine in post processing.
+
+### benchmark / perf tests: these are pretty inaccurate.
+# 29 seconds cpu use. video bitrate 1500k, 8 fps, 2x keyframe interval.
+# * 64k vorbis: 69.7%
+# * 128k vorbis: 70.1% (used in subsequent tests)
+# * 1 audio input: 64.3%
+# * 0 audio inputs: 59.2%
+
+# how I did perf testing: add -to 00:00:30 to ffmpeg opts to
+# conveniently exit after measurement. Then run:
+#
+# ffmpeg "${opts[@]}" &
+# pid=$!
+# sleep 29
+# ps -p $pid -o %cpu
+# kill %%
+
+# filter for only 1 audio input:
+#-filter_complex "[0]azmq,volume=precision=fixed;[1]zmq='b=tcp\://127.0.0.1\:5557',drawbox=color=0x262626,drawtext=fontsize=90: fontcolor=beige: x=40: y=40: text=''"
+# filter with 0 audio input:
+# -filter_complex "[0]zmq='b=tcp\://127.0.0.1\:5557',drawbox=color=0x262626,drawtext=fontsize=90: fontcolor=beige: x=40: y=40: text=''"
+
+
+# When things weren't working, I did some checking on newer ffmpeg to
+# see if that helped. It never did. I compiled the latest ffmpeg release
+# tarball, 7.0.1, and tried the version in debian bullseye by schrooting
+# before running ffmpeg. Building was just configure; make, but then I
+# found some flags that were needed. gpl flags r just because I noticed them.
+# ./configure --enable-libzmq --enable-libpulse --enable-libvorbis --enable-gpl --enable-version3
+#
+
+# note: when playing back, text is going to look aliased unless you
+# watch it in a window that is exactly as bit or bigger than the
+# recording: tabbed i3 window shrinks things. or, use: mpv
+# --video-unscaled
+
+### end background/development docs ###
iankelling.org / git / distro-setup / blobdiff