Differences

This shows you the differences between two versions of the page.

--- tips:video [2018/04/03 20:10] – [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>