This repo contains a for of pikrellcam that is compatible with Debian, Arch and soon Alpine. See below for installation instructions and the original repo links.
PiKrellCam is an audio/video recording motion detect program with an OSD web interface that detects motion using the Raspberry Pi camera MMAL motion vectors.
Read about it at the original developers page: PiKrellCam webpage
Git download with: $ git clone https://github.com/olipinski/pikrellcam
To install on Arch you might want the following package from AUR:
https://aur.archlinux.org/packages/mpack/
Alpine installation is a WIP. Currently, it would require a recompile of the binary and shipping a sepearte one, plus an installation of more RasPi libs.
Alpine installation requires it to be in sys mode.
doas is used by default. If your Alpine installation uses sudo instead , you might want to install doas instead, or modify the bash files in this repo.
Also you will need to setup the camera to work on Arch/Alpine. This can usually be done with edits to /boot/config.txt, but might depend on the specific Pi. For example on the PiZero this could be the config:
# See /boot/overlays/README for all available options
gpu_mem=128
start_file=start_x.elf
fixup_file=fixup_x.dat
initramfs initramfs-linux.img followkernel
cma_lwm= cma_hwm= cma_offline_start=
disable_camera_led=1