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+====== Raspberry Pi Camera on ZoneMinder ======
+I spent a lot of time trying to find some good software to run on a Raspberry Pi to turn it into a camera. Even tried to write my own using Perl, but all the libraries are in Python, so it took too much for a simple project.
+I found the v4l2rtspserver (https://github.com/mpromonet/v4l2rtspserver) and decided to try it. The author has a good page, but assumes I knew how to configure ZoneMinder (which was mistaken).
+Anyway, no GUI needed, so I did the Raspberry Pi OS Lite (https://www.raspberrypi.org/software/operating-systems/) and set it up, then did the following. Ended up with a pretty decent camera that is not "phoning home" with all your images.
+===== Get raspbian image onto SD =====
+  - Download the Lite version of Raspbian from [[https://www.raspberrypi.org/downloads/raspbian/]]
+  - write the downloaded image to the micro-sd (do not uncompress)
+  - mount /boot from SD onto /mnt
+<code bash>
+touch /mnt/boot/ssh # enable ssh
+# only do the following if you need wifi. Change country code, ssid and psk for your system
+# see [[https://www.raspberrypi.org/documentation/configuration/wireless/headless.md]]
+cat <<EOF >/mnt/boot/wpa_supplicant.conf
+ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
+update_config=1
+country=<Insert country code here>
+network={
+ ssid="<Name of your WiFi>"
+ psk="<Password for your WiFi>"
+}
+EOF
+</code>
+Insert SD into your Pi and boot up.
+===== Configure Raspberry Pi =====
+Enable wlan by adding the following to /etc/wpa_supplicant/wpa_supplicant.conf
+<file>
+country=US
+network={
+   ssid="your ssid"
+   psk="your psk"
+}
+</file>
+Now, do the install
+<code bash>
+# Set up Camera
+raspi-config # go to Interface, and enable camera
+reboot
+ls -lh /dev/video*
+raspistill -v -o test.jpg # Verify camera works
+# Remove Swap File
+sudo systemctl stop dphys-swapfile.service
+sudo systemctl disable dphys-swapfile.service
+sudo systemctl mask dphys-swapfile.service
+sudo rm /var/swap
+# add zram for swap
+sudo apt-get install zram-tools
+sed -i 's\.*ALLOCATION=.*\ALLOCATION=100\g' /etc/default/zramswap
+sudo systemctl enable zramswap
+sudo systemctl restart zramswap
+# Set up ntp
+sudo apt-get install ntp
+sudo timedatectl set-timezone America/Chicago
+# add base packages needed
+sudo apt install \
+liblivemedia-dev liblog4cpp5-dev libasound2-dev git gdebi-core cmake build-essential v4l-utils
+# get and build v4l2...
+git clone https://github.com/mpromonet/v4l2rtspserver
+cd v4l2rtspserver
+cmake .
+make
+sudo make install
+# do the install
+sudo gdebi v4l2rtspserver-0.2.0-6-g3542b6f-Linux-armv6l.deb
+# create systemd module
+cat <<EOF >/etc/systemd/system/v4l2rtspserver.service
+# systemd configuration for v4l2rtspserver
+# /etc/systemd/system/v4l2rtspserver.service
+[Unit]
+Description=v4l2rtspserver rtsp streaming server
+After=network.target
+[Service]
+#ExecStartPre=/usr/bin/v4l2-ctl --set-ctrl vertical_flip=1
+ExecStartPre=/usr/bin/v4l2-ctl --set-ctrl h264_i_frame_period=5
+ExecStart=/usr/local/bin/v4l2rtspserver -F 5 -W 1280 -H 720
+#ExecReload=/bin/kill -HUP $MAINPID
+Type=simple
+User=root
+Group=video
+Restart=always
+[Install]
+WantedBy=multi-user.target
+EOF
+# enable the service
+sudo systemctl enable --now v4l2rtspserver.service
+</code>
+At this point, you should be able to get an rtsp by pointing vlc to [[rtsp://{pi zero ip}:8554/unicast]]
+===== Zoneminder Configuration =====
+Create a new monitor in ZoneMinder with the following parameters
+  * Source Type: Remote
+  * Remote Protocol: RTSP
+  * Remote Method: RTP/Unicast
+  * Remote Host Name: Hostname or IP
+  * Remote Host Port: 8554
+  * Remote Host Path: /unicast
+  * Capture Width: 640
+  * Capture Height: 480
+You should soon see the output in zoneminder.
+===== Production =====
+For production, change the resolution of //both// the camera and the ZoneMinder configuration
+  - Edit /etc/systemd/system/v4l2rtspserver.service
+    - Change -W and -H (width and height) to your desired parameters
+      - 1920 x 1080 (1080p) Gives you a lot of details, but also transfers a lot of traffic and is fuzzy
+      - 1280 x 720 (720p) Is a lot lower bandwidth and "prettier" picture
+      - <code bash>
+# reload the systemctl daemon
+systemctl daemon-reload
+# reload the config for v4l2rtspserver
+systemctl restart v4l2rtspserver
+# Set v4l2rtspserver to autostart
+systemctl enable v4l2rtspserver
+</code>
+  - Edit Monitor on ZoneMinder
+    - Set Capture Resolution to same values as camera
+===== Links =====
+  * https://zoneminder.blogspot.com/p/rasbpeery-pi-zero-camera.html
+  * https://carlos-journal.blogspot.com/2017/05/setting-up-rtsp-server-in-raspberry-pi.html
+  * https://unix.stackexchange.com/questions/322720/why-wont-my-enabled-systemd-service-start-on-boot