From 58e21b77c52ff5fedfa26e506402a17e9a89d64a Mon Sep 17 00:00:00 2001
From: romanwarlock <roman.warlock@gmail.com>
Date: Tue, 8 Dec 2020 17:35:03 +0100
Subject: [PATCH] ImageMagick-free

---
 thumbgen.sh | 73 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 thumbgen.sh

diff --git a/thumbgen.sh b/thumbgen.sh
new file mode 100644
index 0000000..1a4252d
--- /dev/null
+++ b/thumbgen.sh
@@ -0,0 +1,73 @@
+#!/bin/bash
+# 
+#
+# Dependencies/Requirements:
+# 1. ffmpeg
+# ImageMagick dependence is REMOVED
+#
+# Usage:
+# . th.sh COLUMNS ROWS SIZE INPUT
+#
+# COLUMNS means number of columns;
+# ROWS means nubler of rows;
+# SIZE is the length of the longer side of the output, e.g., 1920 if you want
+# to get an 1920*1080 output image;
+# INPUT is the path to the input file;
+#
+# Example:
+# . th.sh 3 14 1920 video.mp4
+if [[ $# != 4 ]]; then
+    echo "wrong number of arguments
+
+Usage:
+. th.sh COLUMNS ROWS SIZE INPUT
+COLUMNS means number of columns;TILE is in the form 'MxN' (where M * N should match NFRAMES), e.g., 4x4;
+ROWS means nubler of rows;
+SIZE is the length of the longer side of the output, e.g., 1920 if you want
+to get an 1920*1080 output image;
+INPUT is the path to the input file;
+OUTPUT is the path to the output file (make sure intermediate directories
+exist).
+
+Example:
+. th.sh 3 14 1920 video.mp4
+"
+    return 1
+fi
+NFRAMES=$(echo "scale=0;$1*$2" | bc)
+TILE=$(echo "$1x$2")
+SIZE=$3
+INPUT=$4
+DURX=$(ffmpeg -i "$4" 2>&1 | grep Duration | awk '{print $2}' | tr -d ,)
+DURATION=$(ffmpeg -i "$4" 2>&1 | grep "Duration"| cut -d ' ' -f 4 | sed s/,// | sed 's@\..*@@g' | awk '{ split($1, A, ":"); split(A[3], B, "."); print 3600*A[1] + 60*A[2] + B[1] }')
+RES=$(ffmpeg -i "$4" 2>&1 | grep -oP 'Stream .*, \K[0-9]+x[0-9]+')
+FILESIZE=$(du -sm "$4" | awk '{print $1}')
+TMPDIR=/tmp/thumbnails-${RANDOM}/
+mkdir $TMPDIR
+for (( VARIABLE=0; VARIABLE<NFRAMES; VARIABLE++ ))
+do
+OFFSET=$(echo "scale=2;$VARIABLE*$DURATION/$NFRAMES+$DURATION/$NFRAMES/2" | bc)
+if [ $VARIABLE -gt 9 ];then
+  ZEROS="00"
+  if [ $VARIABLE -gt 99 ];then
+    ZEROS="0"
+    if  [ $VARIABLE -gt 999 ];then
+       ZEROS=""
+    fi
+  fi
+else
+  ZEROS="000"
+fi
+ffmpeg -start_at_zero -copyts -ss $OFFSET -i "$4" -vf "drawtext=fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf:fontsize=45:fontcolor=white::shadowcolor=black:shadowx=2:shadowy=2:box=1:boxcolor=black@0:x=(W-tw)/40:y=H-th-10:text='%{pts\:gmtime\:0\:%H\\\\\\:%M\\\\\:%S}'" -vframes 1 ${TMPDIR}$ZEROS$VARIABLE.jpeg
+done
+ffmpeg -pattern_type glob -i "${TMPDIR}*.jpeg" -filter_complex tile=$TILE:margin=4:padding=4:color=white ${TMPDIR}output.jpg
+echo "  $4" >>${TMPDIR}myfile.txt
+echo "  $RES" >>${TMPDIR}myfile.txt
+echo "  $FILESIZE Mb" >>${TMPDIR}myfile.txt
+echo "  $DURX" >>${TMPDIR}myfile.txt
+thewidth=$(ffmpeg -i ${TMPDIR}output.jpg 2>&1 |grep Video|awk '{ split( $8, pieces,  /[x,]/ ) ; print pieces[1] }')
+theheight=$(ffmpeg -i ${TMPDIR}output.jpg 2>&1 |grep Video|awk '{ split( $8, pieces,  /[x,]/ ) ; print pieces[2] }')
+theheight=$(echo "scale=0;$theheight*$SIZE/$thewidth" | bc)
+ffmpeg -i ${TMPDIR}output.jpg -vf scale=${SIZE}x${theheight} -vframes 1 ${TMPDIR}th.jpg
+theheight=$(echo "$theheight+150" | bc)
+ffmpeg -f lavfi -i color=white:${SIZE}x${theheight} -i ${TMPDIR}th.jpg -filter_complex "[0:v][1:v] overlay=0:150,drawtext=fontfile=/usr/share/fonts/truetype/dejavu/DejaVuSans.ttf:fontsize=20:fontcolor=black:x=30:y=20:textfile=${TMPDIR}myfile.txt" -vframes 1 th${RANDOM}.jpg