Created
September 21, 2011 19:40
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Shell script to generate tiny still images extracted at 1 second intervals from a video file (requires ffmpeg)
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#!/bin/bash | |
# Set things up... | |
INFILE=$1 | |
if [[ -z "$INFILE" || ! -f $INFILE ]]; then | |
echo Please supply the location of a video file | |
exit 1 | |
fi | |
OUTDIR=./tiles | |
STEP=1 | |
CURR=1 | |
if [ ! -d $OUTDIR ]; then | |
mkdir $OUTDIR | |
fi | |
# Find the duration of the video, in seconds | |
LEN_TXT=`ffmpeg -i $INFILE 2>&1|grep Duration|cut -f4 -d' '|cut -f1 -d'.'| sed 's/:0/:/g' | sed 's/:/ \\* 3600 + /'|sed 's/:/ \\* 60 + /'` | |
let "LEN=$LEN_TXT" | |
echo "Duration=$LEN seconds" | |
FILENAME=`basename $INFILE` | |
# Make the thumbnail images (32x24 pixels) | |
while [ $CURR -le $LEN ] | |
do | |
PADDED_NUM=`printf "%05d" $CURR` | |
THUMBFILE=$OUTDIR/$FILENAME.$PADDED_NUM.jpg | |
echo Processing $CURR of $LEN | |
ffmpeg -ss $CURR -i $INFILE -vcodec mjpeg -vframes 1 -y -an -f rawvideo -s 32x24 $THUMBFILE >/dev/null 2>&1 | |
let CURR+=STEP | |
done | |
echo Finished. |
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