Script for simultaneous streaming and saving output from Raspberry Pi camera.

stream.sh

#!/bin/bash

# Script for simultaneous streaming and saving output from Raspberry Pi camera.
# newest version at: https://gist.github.com/pawelszydlo/ee6d317b2d6f37e32a93f97a3d5615d0

date=`date +%Y-%m-%d_%H-%M-%S`i
recordings_dir="/home/pi/recordings"
stream_dir="$recordings_dir/$date"
min_disk_space=200

monitor_space(){
    while true; do
        left=$(df -m . | tail -1 | awk '{print $4}')
        echo "Disk space left: $left MB"
        if [ "$left" -lt "$min_disk_space" ]; then
            # Find and delete the oldest file.
            oldest_file=$(find $recordings_dir -type f -printf "%T@ %p\n" | sort -nr | tail -1 | cut -d' ' -f 2)
            echo "Deleting oldest file: $oldest_file"
            rm "$oldest_file"
            # remove empty directories.
            find $recordings_dir -type d -empty -delete
        fi
        sleep 60
    done
}

echo "Creating stream dir $stream_dir..."
mkdir -p "$stream_dir"
cd "$stream_dir"

echo "Starting free space monitoring..."
monitor_space &
monitor_pid=$!

echo "Starting streaming..."

raspivid -o - -t 0 -hf -w 1920 -h 1080 -fps 30 | \
tee >(split -d --suffix=3 --additional-suffix='.h264' --bytes=50m -) | \
cvlc stream:///dev/stdin --sout '#standard{access=http,mux=ts,dst=0.0.0.0:1234}' :demux=h264

echo "Stopping disk space monitor..."
kill $monitor_pid > /dev/null 2>&1