Creating a 2×2 Security Camera Matrix using FFmpeg

https://youtu.be/Xr1XTl0cAAE

FFmpeg Playlist: https://www.youtube.com/playlist?list=PLErU2HjQZ_ZOPDZ71Khzt5PX4X4j6flkg

Amcrest Playlist: https://www.youtube.com/playlist?list=PLErU2HjQZ_ZNYE224qh9K0hhaaIxU-rta

Set Video Sources as Shell Variables
VID_TL_CAMERA1="rtsp://user:password@ip_address:554/cam/realmonitor?channel=1&subtype=1"
VID_TR_CAMERA2="rtsp://user:password@ip_address:554/cam/realmonitor?channel=1&subtype=1"
VID_BL_CAMERA3="rtsp://user:password@ip_address:554/cam/realmonitor?channel=1&subtype=1"
VID_BR_CAMERA4="rtsp://user:password@ip_address:554/cam/realmonitor?channel=1&subtype=1"
Create 2×2 Video Matrix
ffmpeg -i $VID_TL_CAMERA1 -i $VID_TR_CAMERA2 -i $VID_BL_CAMERA3 -i $VID_BR_CAMERA4 -reorder_queue_size 4000 -max_delay 10000000 -filter_complex "[0:v][1:v]hstack[t];[2:v][3:v]hstack[b];[t][b]vstack[v]" -map "[v]" -f h264 -vcodec libx264 -b:v 2500k pipe:1|ffplay -i pipe:0
Create Side by Side Video Matrix
ffmpeg -i $VID_TL_CAMERA1 -i $VID_TR_CAMERA2 -reorder_queue_size 4000 -max_delay 10000000 -filter_complex "[0:v][1:v]hstack[v]" -map "[v]" -f h264 -vcodec libx264 -b:v 2500k pipe:1|ffplay -i pipe:0

Enabling Automatic Unattended Updates on Lightsail Ubuntu Instance (Running WordPress)

https://youtu.be/f47J1JwN_kk

WordPress/AWS Lightsail Playlist: https://www.youtube.com/playlist?list=PLErU2HjQZ_ZMbDcpXu5EcR4yOkHFh_l7F

Open Unattended-upgrades Config for Editing
sudo nano /etc/apt/apt.conf.d/50unattended-upgrades
Uncomment These Lines and set to “true”
Unattended-Upgrade::Remove-Unused-Kernel-Packages "true";
Unattended-Upgrade::Remove-Unused-Dependencies "true";
Unattended-Upgrade::Automatic-Reboot "true";
Uncomment this to Enable All Updates (Security Updates are Default)
	"${distro_id}:${distro_codename}-updates";
Open Config for Auto-upgrade Config for Editing
sudo nano /etc/apt/apt.conf.d/20auto-upgrades
Add These Lines
APT::Periodic::Download-Upgradeable-Packages "1";
APT::Periodic::AutocleanInterval "7";
Check Configuration Changes
sudo unattended-upgrades --dry-run --debug