Created
May 18, 2020 16:02
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Bash script to run something at dawn
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| #!/bin/bash | |
| civ_tw=$(curl -s 'https://api.sunrise-sunset.org/json?lat=X&lng=Y&date=today&formatted=0' | json_pp | grep civil_twilight_begin | awk '{print $3}' | sed -e 's/[",]//g') | |
| date_sec_ct=$(date -d ${civ_tw} +%s) | |
| date_now=$(date +%s) | |
| sleepsec=$((${date_sec_ct} - ${date_now})) | |
| end_at=$((${date_sec_ct} + 3600)) | |
| echo "Sleeping for ${sleepsec}" | |
| sleep ${sleepsec} | |
| cd ~/dawn | |
| while /usr/bin/true | |
| do | |
| fn=$(date +%H.%M.%S.jpg) | |
| ffmpeg -y -rtsp_transport tcp -i rtsp://X.X.X.X:5000/stream0 -vframes 1 ~/dawn/${fn} | |
| now=$(date +%s) | |
| if [ ${now} -gt ${end_at} ]; then | |
| exit 0 | |
| fi | |
| sleep 30 | |
| done |
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