https://wiki.archlinux.org/title/Multi-pointer_X
xinput create-master [name]
xinput list
xinput reattach [slave device name or id] [master device name or id]
mouse to <new>
keyboard to <new>
2025-01-06
alsa both hdmi & internal/3.5mm
~/.asoundrc
# /proc/asound/cards
# default - plug
# asymed - asym
# all - route - multi
# intdmix - dmix
# int - hw
# hdmidmix3 - dmix
# hdmi3 - hw
# capture
pcm.int {
type hw
card PCH
# device 0
}
ctl.int {
type hw
card PCH
# device 0
}
pcm.hdmi3 {
type hw
card HDMI
device 3
}
ctl.hdmi3 {
type hw
card HDMI
device 3
}
pcm.hdmi7 {
type hw
card HDMI
device 7
}
ctl.hdmi7 {
type hw
card HDMI
device 7
}
pcm.intdmix {
type dmix
ipc_key 1024
slave {
pcm "int"
channels 2
period_time 0
period_size 1024
buffer_size 4096
rate 44100
}
bindings {
0 0
1 1
}
}
pcm.hdmidmix3 {
type dmix
ipc_key 4096
slave {
pcm "hdmi3"
channels 2
period_time 0
period_size 1024
buffer_size 4096
rate 44100
}
bindings {
0 0
1 1
}
}
pcm.hdmidmix7 {
type dmix
ipc_key 8192
slave {
pcm "hdmi7"
channels 2
period_time 0
period_size 1024
buffer_size 4096
rate 44100
}
bindings {
0 0
1 1
}
}
pcm.all {
type route
slave.pcm {
type multi
slaves.a.pcm "intdmix"
slaves.a.channels 2
bindings.0.slave a
bindings.0.channel 0
bindings.1.slave a
bindings.1.channel 1
slaves.b.pcm "hdmidmix3"
slaves.b.channels 2
bindings.2.slave b
bindings.2.channel 0
bindings.3.slave b
bindings.3.channel 1
slaves.c.pcm "hdmidmix7"
slaves.c.channels 2
bindings.4.slave c
bindings.4.channel 0
bindings.5.slave c
bindings.5.channel 1
}
ttable.0.0 1
ttable.1.1 1
ttable.0.2 1
ttable.1.3 1
ttable.0.4 1
ttable.1.5 1
}
ctl.all {
type hw
card PCH
}
pcm.!default {
type plug
# slave.pcm "dmixer"
slave.pcm "asymed"
# slave.pcm "all"
# slave.pcm "hdmidmix"
# slave.pcm "hdmidmix3"
# slave.pcm "hdmidmix7"
# slave.pcm "intdmix"
}
pcm.dmixer {
type dmix
ipc_key 1024
slave {
# HDMI
# pcm "hw:0,0"
# Analog
pcm "hw:0,3"
period_time 0
period_size 1024
buffer_size 4096
rate 44100
}
bindings {
0 0
1 1
}
}
pcm.asymed {
type asym
# playback.pcm "dmixer"
playback.pcm "all"
capture.pcm "hw:PCH"
# capture.pcm "hw:0,2"
}
pcm.dsp0 {
type plug
slave.pcm "asymed"
}
ctl.mixer0 {
type hw
card 0
}
Apache reverse proxy HTTPS to HTTP
Listen a.b.c.d:443
<VirtualHost a.b.c.d:443>
ServerName example.org
# …SSL configuration…
ProxyRequests off
ProxyPass / http://localhost:3000/
ProxyPassReverse / http://localhost:3000/
RequestHeader set X-Forwarded-Protocol "https"
Header edit Location ^http://(.*)$ https://$1
</VirtualHost>
ffmpeg
jpg -> mp4
ffmpeg -framerate 1 -pattern_type glob -i '*.jpg' -c:v libx264 video.mp4
ffmpeg -framerate 0.3 -pattern_type glob -i '*.jpg' -vf "scale=-1:3072,pad=4096:ih:(ow-iw)/2" -c:v libx264 video.mp4
video -> png
ffmpeg -skip_frame nokey -i file.avi -vf 'scale=128:72,tile=8x8' -an -vsync 0 keyframes%03d.png
change framerate
ffmpeg -i in.mp4 -filter:v "setpts=PTS*8" -an -vcodec copy -r 30 out.mp4
ffmpeg -i in.mp4 -filter:v "setpts=0.1*PTS" -an -r 60 out.mp4
ffmpeg -i in.mp4 -vf "select='not(mod(n\,60))',setpts=N/FRAME_RATE/TB" -an -r 60 out.mp4
ffmpeg -i in.mp4 -vf framestep=90,setpts=N/FRAME_RATE/TB -an -r 60 out.mp4
ffmpeg -i in.mp4 -c copy -f h264 - | ffmpeg -r 120 -i - -c copy out.mp4
ffmpeg -i i.mp4 -i 1.jpg -filter_complex "[1:v] fade=out:125:25:alpha=1 [intro]; [0:v][intro] overlay [v]" -map "[v]" -map 0:a -acodec copy o5.mp4
ffmpeg -y -i i.mp4 -i 1.jpg -filter_complex "[1:v] fade=out [intro]; [0:v][intro] overlay=x=100:y=800 [v]" -map "[v]" -map 0:a -acodec copy o9.mp4
ffmpeg -i i.mp4 -i 1.jpg -i a.svg -filter_complex "[0:v][1:v]overlay=100:600[v0]; [v0][2:v]overlay=W-200:30" -c:a copy -y o6.mp4
ffmpeg -i i.mp4 -i 1.jpg -i a.svg -filter_complex "[0:v][1:v]overlay=100:H-300[VV]; [VV][2:v]overlay=W-200:30" -c:a copy -y o6.mp4
ffmpeg -i i.mp4 -i s.svg -i l.svg -filter_complex "[0:v][1:v]overlay=100:H-150:enable='between(t,3,4)' [VV]; [VV][2:v]overlay=W-200:30:enable='between(t,1,2)'" -c:a copy -y o6.mp4
ffmpeg -ss $a -to $b -i $I -i $Logo -i ba0.svg -i ba2.svg -filter_complex
"[0:v][1:v]overlay=W-160:30 [VV]; [VV][2:v]overlay=100:H-150 [VVV]; [VVV][3:v]overlay=100:H-150:enable='between(t,$T2,30)'" -y $OPT $N
ffmpeg cam
ffmpeg /dev/video0
ffmpeg -f v4l2 -list_formats all -i /dev/video0
ffplay -f v4l2 -list_formats all /dev/video0
arecord -l
cat /proc/asound/cards
hw:1,0
lsusb -v | grep 'tSamFreq'
arecord -f S16_LE -c 2 -D "hw:1,0" a-001
ffplay -f alsa -i hw:1,0
ffplay -f v4l2 -video_size 1920x1080 -framerate 30 /dev/video0
ffplay -f v4l2 -video_size 1280x720 -framerate 30 /dev/video0
ffplay -f v4l2 -video_size 1366x768 -framerate 30 /dev/video0
ffmpeg -f v4l2 -framerate 30 -video_size 1920x1080 -c:v mjpeg -i /dev/video0 -c:v copy output.mov
ffmpeg -f v4l2 -framerate 30 -c:v mjpeg -i /dev/video0 -c:v copy output.mkv
ffmpeg -f v4l2 -framerate 30 -c:v mjpeg -i /dev/video0 -f alsa -i hw:1,0 -c:v copy -c:a copy output.mkv
ffmpeg -f v4l2 -framerate 30 -c:v mjpeg -i /dev/video0 -f alsa -i hw:1,0 -c copy output.mkv
ffmpeg -f v4l2 -framerate 30 -c:v mjpeg -i /dev/video0 -f alsa -i hw:1,0 -c copy -f rawvideo - | ffplay -
ffmpeg -f v4l2 -framerate 30 -c:v mjpeg -i /dev/video0 -f alsa -i hw:1,0 -c copy -f avi - | ffplay -
ffplay -f v4l2 -framerate 30 /dev/video0
vlc v4l2:///dev/video0 --input-slave=alsa://hw1,0 --alsa-samplerate=96000
bluetooth
/usr/local/etc/init.d/bluez status
pulseaudio
bluetoothctl power on
bluetoothctl agent on
bluetoothctl
scan on
scan off
bluetoothctl devices
bluetoothctl info
bluetoothctl remove xx:xx:xx:xx:xx:xx
bluetoothctl trust xx:xx:xx:xx:xx:xx
bluetoothctl pair xx:xx:xx:xx:xx:xx
bluetoothctl connect xx:xx:xx:xx:xx:xx
bluetoothctl info xx:xx:xx:xx:xx:xx
pactl list sinks | grep Name:
pactl set-default-sink bluez_sink.xx_xx_xx_xx_xx_xx.a2dp_sink
pactl -- set-sink-volume 1 -10%
pactl -- set-sink-volume 1 +10%
pactl -- set-sink-volume 1 10%
pactl -- set-sink-volume 1 50%
2023-01-10
jdk ssl/tls
1.7 default tls1
-Dhttps.protocols=SSLv3,TLSv1,TLSv1.1,TLSv1.2
-Djavax.net.debug=ssl
1.8 default tls1.2
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