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--- tips:video [2018/01/09 14:54] – [camera motion] scipio
+++ tips:video [2020/09/02 15:59] (current) – [from images to video] scipio
@@ Line 26: / Line 26: @@
 <code>
 # 5 images per seconds
-ffmpeg -y -framerate 5 -pattern_type glob -i '*.jpg' -c:v libx264 -vf "fps=25,scale=720:-1" out.mp4
+ffmpeg -y -framerate 5 -pattern_type glob -i '*.jpg' -c:v libx264 -vf "fps=25,scale=720:trunc(ow/a/2)*2" out.mp4
 </code>
+<code>
+ffmpeg -r 30 -s 1080x1080 -i imgs/%05d.jpg -vcodec libx264 -crf 15 -pix_fmt yuv420p out.mkv
+</code>
+  * crf: quality, minor is better
+===== from video to images =====
+<code>
+ffmpeg -i input.mp4 -qscale:v 2 imgs/%05d.jpg
+</code>
+  * qscale:v is quality, 2-15 minor is better
 ===== MKV=====
@@ Line 88: / Line 102: @@
 <code>
 tomkv file1 file2 ...
+</code>
+===== lates =====
+<code bash>
+#!/bin/bash
+CHATID=$1
+BASEpath='/media/camere'
+[ -z "${CHATID}" ] && exit 1
+for folder in $(find /media/camere/ -maxdepth 1 -name "camera*" -type d); do
+	for video in $(find $folder -newer $folder.jpg -name "*mp4"); do
+		i=$(echo "$folder" | tail -c 2)
+    	        preview=$BASEpath/preview$i.mp4
+		ago_seconds=$(( $(date +%s) - $(stat -c %Y $video ) ))
+		if [ $ago_seconds -le 3600 ]; then
+			ago="$(( $ago_seconds / 60 )) minutes"
+		else
+			ago="$(( $ago_seconds / 3600 )) hours"
+		fi
+		echo "video $video is $ago"
+		( ffmpeg -i $video -r 0.5 -c:v libx264 -an -t 30 -y $preview </dev/null >/dev/null 2>/tmp/preview$i.log ; \
+			~/telegram.sh "$ago (camera $i)" "${preview}" $CHATID ) &
+		sleep 1
+	done
+done
+</code>
+===== on motion =====
+<code>
+#!/bin/bash
+CHROOT=/media/camere/
+FILENAME=$1
+# name of the first folder level inside CHROOT
+INPUT=$(cut -d'/' -f1 <<<"${FILENAME/$CHROOT/}")
+# lowercase
+INPUT=${INPUT,,}
+LOCK=${CHROOT}${INPUT}.lock
+[ -f $FILENAME ] && ln -sf $FILENAME ${CHROOT}${INPUT}.jpg
+[ -f $LOCK ] && exit 0
+touch $LOCK
+name="`date +%Y-%m-%d_%H.%M`"
+i=${INPUT/camera/}
+video=$CHROOT/camera$i/$name.mp4
+echo "acquire from camera $i"
+( ffmpeg -i rtsp://admin:test@192.168.0.9$i/12 -timeout 10 -stimeout 5000000 -c:v copy -an -t 300 -y $video </dev/null >/dev/null 2>/tmp/camera$i.log ; rm -f $LOCK ) &
+</code>
+===== telegram =====
+<code>
+#!/bin/sh
+set -x
+caption=$1
+video=$2
+CHATID=$3
+#
+TOKEN="xxxx:xxxx"
+[ -z "$CHATID" ] && exit 1
+curl -F chat_id="$CHATID" \
+	-F document=@"${video}" \
+	-F caption="$caption" https://api.telegram.org/bot${TOKEN}/sendDocument
+</code>
+===== preview day =====
+<code>
+#!/bin/bash
+set -x
+CHATID=$1
+CHATID=${CHATID:=xxxxxx}
+i=$2
+i=${i:=1}
+SPEED=${3}
+SPEED=${SPEED:=50}
+INVSPEED=$(echo "1/$SPEED" | bc -l)
+[ -z "$CHATID" ] && exit 1
+BASE=/media/camere
+DAY=$(date +"%Y-%m-%d")
+video=$BASE/day-$i-$DAY.mp4
+echo "create $video"
+# 0.02: 20 volte la velocita
+if [ ! -f $video ]; then
+	ffmpeg -f concat -safe 0 \
+		-i <(find "$BASE/camera$i" -mmin -1440 -name "*mp4" -printf "%AT file '%p'\n" | sort -k1.1n | cut -c 21- ) \
+		-c:v libx264 -filter:v "setpts=$INVSPEED*PTS" -an -y $video
+		# -r 0.1 -c:v libx264 -an -y $video
+fi
+~/telegram.sh "Camera $i" "${video}" $CHATID
 </code>

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