mirror of
https://github.com/JanJastrow/ViThumbs.git
synced 2024-11-12 19:54:50 +01:00
76 lines
2.6 KiB
Bash
76 lines
2.6 KiB
Bash
#!/bin/bash
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if [ -z "$1" ]; then
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echo "usage: ./thumbgen.sh INPUT [COLUMNS=5] [ROWS=5] [SIZE=1600]"
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exit
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fi
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# Define variables
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INPUT=$1
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COLUMNS=$2
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if [ -z "$COLUMNS" ]; then
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COLUMNS=5
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fi
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ROWS=$3
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if [ -z "$ROWS" ]; then
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ROWS=5
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fi
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SIZE=$4
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if [ -z "$SIZE" ]; then
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SIZE=1600
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fi
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NFRAMES=$(echo "scale=0;$COLUMNS*$ROWS" | bc)
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DURX=$(ffmpeg -i "$INPUT" 2>&1 | grep Duration | awk '{print $2}' | tr -d ,)
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DURATION=$(ffmpeg -i "$INPUT" 2>&1 | grep "Duration"| cut -d ' ' -f 4 | sed s/,// | sed 's@\..*@@g' | awk '{ split($1, A, ":"); split(A[3], B, "."); print 3600*A[1] + 60*A[2] + B[1] }')
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RES=$(ffprobe -v error -select_streams v:0 -show_entries stream=width,height -of csv=s=x:p=0 "$INPUT")
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FILESIZE=$(du -sm "$INPUT" | awk '{print $1}')
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FONT="/System/Library/Fonts/Supplemental/PTMono.ttc"
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METADATA_PX=90
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TMPDIR="/tmp/thumbnails-${RANDOM}/"
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mkdir $TMPDIR
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for (( VARIABLE=0; VARIABLE<NFRAMES; VARIABLE++ ))
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do
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OFFSET=$(echo "scale=2;$VARIABLE*$DURATION/$NFRAMES+$DURATION/$NFRAMES/2" | bc)
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if [ $VARIABLE -gt 9 ];then
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ZEROS="00"
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if [ $VARIABLE -gt 99 ];then
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ZEROS="0"
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if [ $VARIABLE -gt 999 ];then
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ZEROS=""
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fi
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fi
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else
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ZEROS="000"
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fi
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# Create thumbnails
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ffmpeg -start_at_zero -copyts -ss $OFFSET -i "$INPUT" -vf "drawtext=fontfile=$FONT:fontsize=45:fontcolor=white::shadowcolor=black:shadowx=2:shadowy=2:box=1:boxcolor=black@0:x=(W-tw)/40:y=H-th-20:text='%{pts\:gmtime\:0\:%H\\\\\\:%M\\\\\:%S}'" -vframes 1 ${TMPDIR}$ZEROS$VARIABLE.png
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done
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# Merge thumbnails into tile image
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ffmpeg -pattern_type glob -i "${TMPDIR}*.png" -filter_complex tile=${COLUMNS}x${COLUMNS}:margin=4:padding=4:color=white ${TMPDIR}output.png
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# Output metadata to file
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echo "Filename: $INPUT" >>${TMPDIR}metadata.txt
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echo "Resolution: $RES" >>${TMPDIR}metadata.txt
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echo "Filesize: $FILESIZE Mb" >>${TMPDIR}metadata.txt
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echo "Duration: $DURX" >>${TMPDIR}metadata.txt
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# Get dimensions of tile image
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thewidth=$(ffmpeg -i ${TMPDIR}output.png 2>&1 |grep Video|awk '{ split( $6, pieces, /[x,]/ ) ; print pieces[1] }')
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theheight=$(ffmpeg -i ${TMPDIR}output.png 2>&1 |grep Video|awk '{ split( $6, pieces, /[x,]/ ) ; print pieces[2] }')
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# Redefine height & scale (according to $SIZE)
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scaledheight=$(echo "scale=0;$theheight*$SIZE/$thewidth" | bc)
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ffmpeg -i ${TMPDIR}output.png -vf scale=${SIZE}x${scaledheight} -vframes 1 ${TMPDIR}th.png
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# Add space to the top of the image
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finalheight=$(echo "$scaledheight+$METADATA_PX" | bc)
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# Add Metadata
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ffmpeg -f lavfi -i color=black:${SIZE}x${finalheight} -i ${TMPDIR}th.png \
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-filter_complex "[0:v][1:v] overlay=0:$METADATA_PX,drawtext=fontfile=$FONT:fontsize=20:fontcolor=white:x=10:y=10:textfile=${TMPDIR}metadata.txt" \
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-vframes 1 th${RANDOM}.png
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