Hey all, today I'm in a sharing mood so here's a little shell script that
automatically scans a user defined folder recursively for video files
and auto extracts a user defined amount of thumbnails from each file
it finds. Thumbnail size, compression, interval are easy controllable and
instructions and comments are added to the source.
This script is for use on a unix server and saves you having to download
the vids to a workstation in order to generate thumbnails in whatever
software and having to re-upload the thumbs manually back to the server.
The thumbnails uses the following naming scheme for the generated thumbnails
foldername_x.jpg where x is the number of thumbnail that is generated by
the script i.e. if you define to extract 2 thumbs for each file...they will be
named: foldername_1.jpg and foldername_2.jpg so it's very easy to see
which thumbnails comes from which video input file.
The script can process any video format as long as the ffmpeg binary
which is used to extract the frames has the codec installed.
ffmpeg is used to extract the raw frame data from the video file which
is stored without any manipulation as a .PNG file and then the ImageMagick
convert tool does the required image manipulation and conversion to JPEG
ffmpeg can do this too but this way the quality of the jpeg thumbnail is
MUCH better than doing it at once using ffmpeg only.
A BIG THANK YOU to GrouchyAdmin who helped me today adding the folder
and file scanning of the script to complete the script today as I urgently
needed it so my content guy could start using it.......but I wasn't able
to finish it today or even this week due to severe lack of time.
If ANYONE is looking for a reliable coder/sysadmin that delivers his work
in a timely fashion and with the result you asked for then look no further
and contact GrouchyAdmin for your job and save yourself from getting
screwed every possible way you can think off which lately seems to be
the hottest trend. I don't vouch for people to avoid getting hassled by
people asking me why the hell I send them somewhere.....but with
Grouchy I'm comfortable enough and not having to worry about that.
In the unlikely event that I turn out to be wrong feel free to contact me
and if your complaint is valid I'll personally make sure that you'll get what
you ordered.......so Grouchy don't even think of dissapointing me......
I know where you bed sleeps and I'm bigger than you
Ok time for the goodies:
part 1 vidscan.sh
Code:
#!/bin/sh
# Author: Hans Waasdorp [email protected]
# To install save script as vidscan.sh, chmod 755 vidscan.sh
# vidscan.sh
# Purpose: scan folder recursively for video files and extract
# user defined amount of jpg thumbnails of userdefined size and
# jpeg compression level.
# server requirements for script to function:
# ffmpeg + required codecs for media formats
# ImageMagick (convert binary)
# usage: ./vidscan.sh /start/path filename_to_look_for.extension
PATH=/bin:/sbin:/usr/bin:/usr/sbin
SCENE=$2
if [ -d "$1" ]; then
STARTDIR=$1
else
STARTDIR=`pwd`
fi
# Call thumb script 5 = number of jpg thumbs to extract from video file
find "$STARTDIR" -name "$SCENE" -exec /bin/sh /root/extract.sh {} 5 \;
# end
Part 2 extract.sh
Code:
#!/bin/bash
# Author: Hans Waasdorp [email protected]
# extract.sh
# To install save script as extract.sh, chmod 755 extract.sh
# server requirements for script to function:
# ffmpeg + required codecs for media formats
# ImageMagick (convert binary)
# edit variables to your requirements, don't run this script manually
# this script is called automatically by vidscan.sh
SECOND=1;
if [ "x"$2 == "x" ]; then
FIN=$SECOND
else
FIN=$2
fi
# loop until it has captured the number of captures requested
while [ $SECOND -le $FIN ]; do
/usr/bin/ffmpeg -i "$1" -vcodec png -vframes 1 -ss "$SECOND" -an -f rawvideo -y "./$SECOND.png"
# quality 0 best compression 100 no compression, resize thumb dimension
if [ -s "$SECOND.png" ]
then
/usr/bin/convert "$SECOND.png" -quality 80 -resize 160x120 "$SECOND.jpg"
unlink "$SECOND.png"
else
unlink "$SECOND.png"
break
fi
# next part saves thumbnail as foldername_1.jpg where 1 is first thumb extracted.
if [ -f "$SECOND.jpg" ]; then
IFS="|BEER|"
CURDIR="$1"
DIR=`dirname "$CURDIR"`
BASEDIR=`basename "$DIR"`
mv "$SECOND.jpg" "$DIR"/"$BASEDIR"_"$SECOND.jpg"
IFS=" "
# next part changes permissions to 777 and sets ownership to mas and groupname to mas
chmod 777 $DIR/*.jpg
chown mas:mas $DIR/*.jpg
fi
SECOND=$[$SECOND+1];
done
Feel free to comment on it, suggest improvements or telling me it sucks
I might use your comments to improve the script if your comments makes
sense......Flames and thrash comments I'll read for entertainment and will
be ignored.......if you can better do it yourself and post your result.....only
if you it's really better I'll gladly admit and use your result myself......
Request for help and/or assistence post them here or email me. When I
have time I'll be more than happy to assist.......
The script comes without any warranty....the use of it I won't take any
liability for damage to your server and/or data check the code before
running it....if it doesn't make any sense to you either ask before you run
it or hope for the best......if you decide to gamble on it......then accept
the consequences if your gamble turns out that you lose......
It's advisable to first test it in a safe folder with a copy of the files you
test it on.....before even thinking to use it on your live data before being
sure it does exactly what you hope/think/guess it will do........
DON'T COME TO ME TO COMPLAIN WHEN WHEN IT FUCKS UP YOUR SHIT!!!
YOU HAVE BEEN WARNED!!!!!!!
so that's out of the way.....I'll finish by saying that it does exactly what I
said it will do......so if you be careful it's very unlikely anything bad will
happen when using it.........if you have any doubts just ask and I'll explain
if it's safe for you to use........
Time to get some sleep now......behave while I'm gone and see you all
my GFY friends tomorrow........I hope some of you can use this as if you
do it saves can save you a LOT of time......I googled to see if there was
anything like this I could use........either I used the wrong terms to find
it which to be honest really got me suprised.......I expected to find dozens
of scripts that would do something similar like this....but I guess I was wrong
or just too stupid to be able to find them.......
Grouchy thanks again......your quick help is very much appreciated