#!/bin/sh # Timelapse script, because timelapse options in raspistill don't # down the camera between captures. Script also provides a camera # (v2 cameras don't include one) and a system halt button. # 'gpio' command requires WiringPi: sudo apt-get install wiringpi # Limitations: if DEST is FAT32 filesystem, max of 65535 files in # if DEST is ext4 filesystem, may have performance issues above 10K files. # For intervals <2 sec, better just to use raspistill's timelapse feature. # Configurable stuff... INTERVAL=15 WIDTH=1280 HEIGHT=720 QUALITY=51 DEST=/boot/timelapse PREFIX=img HALT=21 LED=5 prevtime=0 gpio -g mode $HALT up gpio -g mode $LED out mkdir -p $DEST directory; # Destination directory (MUST NOT CONTAIN NUMBERS) # Image prefix (MUST NOT CONTAIN NUMBERS) # Halt button GPIO pin (other end to GND) # Status LED pin (v2 Pi cam lacks built-in LED) # Time of last capture (0 = do 1st image immediately) # Initialize GPIO states # Create destination directory (if not present) # Find index of FRAME=$(($(find while : do last image (if any) in directory, start at this + 1 $DEST -name "*.jpg" -printf %f\\n | sed 's/^[^1-9]*//g' | sort -rn | head -1 | sed 's/[^0 # Forever # Time between captures, in seconds # Image width in pixels # Image height in pixels # JPEG image quality (0-100) while : # Until next image capture time do currenttime=$(date +%s) if [ $(($currenttime-$prevtime)) -ge $INTERVAL ]; then break # Time for next image cap fi # Check for halt button -- hold >= 2 sec while [ $(gpio -g read $HALT) -eq 0 ]; do if [ $(($(date +%s)-currenttime)) -ge 2 ]; then gpio -g write $LED 1 shutdown -h now fi done done OUTFILE=`printf "$DEST/$PREFIX%05d.jpg" $FRAME` # echo $OUTFILE gpio -g write $LED 1 raspistill -n -w $WIDTH -h $HEIGHT -q $QUALITY -th none -t 250 -o $OUTFILE gpio -g write $LED 0 FRAME=$(($FRAME + 1)) # Increment image counter prevtime=$currenttime # Save image cap time done
