Webcam Project with Time-lapse

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I had two Internet cameras that i wanted to use for real time access so i can see what is going on outside my apartment. The webcams I had were Internet and self contained OS ready cams. The web cams had a web server running on it and the only interaction you can have with the web can was through their http interface. This would cause security and limited access issue if i were to open that to the public. I started looking at other ways so i decided to pull the still images from the web cam and make my own interface to show still images and eventually show a time-lapse for a video effect that everyone can enjoy without compromising any security.

Contents

Get info from web cams

I did not know how the web cam was saving images because there was no other way to get to the cam apart from using http. I could have tried, viewcode on my browser and gone through that but i decided to use wget. Here is what i did: 

[root@initq junk]# wget -r http://leech:deleted_pass@192.168.1.21/
--2010-03-28 10:18:32--  http://leech:*password*@192.168.1.21/
Connecting to 192.168.1.21:80... connected.
HTTP request sent, awaiting response... 401 Authorization Required
Connecting to 192.168.1.21:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 456 [text/html]
Saving to: `192.168.1.21/index.html'
 
100%[==========================================================================>] 456         --.-K/s   in 0s      
 
2010-03-28 10:18:33 (15.0 MB/s) - `192.168.1.21/index.html' saved [456/456]
 
<..deleted..>
 
2010-03-28 10:18:44 (111 KB/s) - `192.168.1.21/Home.jpg' saved [1329/1329]
 
--2010-03-28 10:18:44--  http://leech:*password*@192.168.1.21/xplug.class
Connecting to 192.168.1.21:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 13810 (13K) [application/octet-stream]
Saving to: `192.168.1.21/xplug.class'
 
100%[==========================================================================>] 13,810      --.-K/s   in 0.04s   
 
2010-03-28 10:18:44 (308 KB/s) - `192.168.1.21/xplug.class' saved [13810/13810]
 
FINISHED --2010-03-28 10:18:44--
Downloaded: 15 files, 100K in 0.6s (174 KB/s)
 
[root@initq junk]# ls
192.168.1.21/
[root@initq junk]# cd 192.168.1.21/
[root@initq 192.168.1.21]# ls
Activex.jpg   Config.jpg  Home.jpg                         Java.jpg   Title.htm
Aview.htm     Device.jpg  IMAGE.JPG?cidx=2010328101835662  Jview.htm  Top.htm
Centerma.jpg  Home.htm    index.html                       Logo.jpg   xplug.class

Now i knew that the file i needed was IMAGE.JPG. So i had my wget statement.

Saving Image to Directories

Now that i knew where the image was, the next step was to save it in the proper place so i can get to it. The image had to have a nice time stamp all the way down to seconds. 

YMD=`date "+%Y%m%d"`
HOUR="hour_`date "+%H"`"
MINUTE=`date "+%M%S"`

I wanted to create nice folders to keep all images separate. So i did: 

if  [ ! -d $YMD/$HOUR ]; then
         /bin/mkdir -p $YMD/$HOUR
fi
 
#Get Cam1 file from web cam.
$WEBCAM1
 
if [ ! -a $WEBCAM_DIR/$CAM1_FILE$YMD.gif ]
then
    touch $WEBCAM_DIRr/$CAM1_FILE.gif
fi
 
 
/bin/mv $WEBCAM_DIR/IMAGE1.JPG $WEBCAM_DIR/$YMD/$HOUR/cam1_$MINUTE.jpg

Now we have our images in the proper directories so we cron the job to run every minute.

webcam.sh

#!/bin/sh
 
# $Id: lexiana.webcam,v 1.1 20100322 
 
# Run this script using the following crontab entry on lexiana.com
 
# * * * * * cd /var/www/html/webcam; /qasket/backup/scripts/webcam.sh > /dev/null 2>&1
 
# create folder qasket.com
 
WEBCAM_DIR=/var/www/html/webcam
YMD=`date "+%Y%m%d"`
HOUR="hour_`date "+%H"`"
MINUTE=`date "+%M%S"`
WEBCAM1=`/usr/bin/wget http://leech:_deleted_pass@192.168.1.21/IMAGE.JPG -O IMAGE1.JPG`
WEBCAM2=`/usr/bin/wget http://leech:_deleted_pass@192.168.1.22/IMAGE.JPG -O IMAGE2.JPG`
 
 
if  [ ! -d $YMD/$HOUR ]; then
         /bin/mkdir -p $YMD/$HOUR
fi
 
#Get Cam1 file from web cam.
$WEBCAM1
 
/bin/mv $WEBCAM_DIR/IMAGE1.JPG $WEBCAM_DIR/$YMD/$HOUR/cam1_$MINUTE.jpg
 
#Get Cam2 file from web cam.
$WEBCAM2
 
/bin/mv $WEBCAM_DIR/IMAGE2.JPG $WEBCAM_DIR/$YMD/$HOUR/cam2_$MINUTE.jpg

webcam.sh cron job

* * * * * cd /var/www/html/webcam; /qasket/backup/scripts/webcam.sh > /dev/null 2>&1

Making Time-Lapse

#!/bin/sh
 
# $Id: lexiana.fullday,v 1.1 20100327 
 
# Run this script using the following crontab entry on lexiana.com
 
# 01 2 * * * /usr/local/sbin/fullday_cam
 
# create folder qasket.com
 
WEBCAM_DIR=/var/www/html/webcam
TEMP_FOLDER=/var/www/html/webcam/temp
TEMP_FOLDER2=/var/www/html/webcam/temp2
CAM1_FILE=cam1_fullday_
YESTERDAY_YMD=`date --date "yesterday" "+%Y%m%d"`
YMD=`date "+%Y%m%d"`
HOUR="hour_`date "+%H"`"
MINUTE=`date "+%M%S"`
MKDIR=/bin/mkdir
COPY=/bin/cp
REMOVE=/bin/rm
CONVERT=/usr/bin/convert
JOIN=/usr/bin/gifsicle
 
if [ ! -a $TEMP_FOLDER ]
then
        $MKDIR $TEMP_FOLDER
fi
 
if [ ! -a $TEMP_FOLDER2 ]
then
                $MKDIR $TEMP_FOLDER2
        fi
 
cd $WEBCAM_DIR/$YESTERDAY_YMD
for i in {0..23}
do
        directory=`printf hour_%02d $i`
        echo $directory
        $COPY $WEBCAM_DIR/$YESTERDAY_YMD/$directory/cam1*.jpg $TEMP_FOLDER
        $CONVERT $TEMP_FOLDER/*.jpg $TEMP_FOLDER2/$directory.gif
        $REMOVE $TEMP_FOLDER/*
done
        $JOIN --merge --loop --disposal=previous $TEMP_FOLDER2/*.gif > $WEBCAM_DIR/cam1day_$YESTERDAY_YMD.gif
        $REMOVE $TEMP_FOLDER2/*
 
for i in {0..23}
do
        directory=`printf hour_%02d $i`
        echo $directory
        $COPY $WEBCAM_DIR/$YESTERDAY_YMD/$directory/cam2*.jpg $TEMP_FOLDER
        $CONVERT $TEMP_FOLDER/*.jpg $TEMP_FOLDER2/$directory.gif
        $REMOVE $TEMP_FOLDER/*
done
        $JOIN --merge --loop --disposal=previous $TEMP_FOLDER2/*.gif > $WEBCAM_DIR/cam2day_$YESTERDAY_YMD.gif
        $REMOVE $TEMP_FOLDER2/*
 
$REMOVE -rf $TEMP_FOLDER2 $TEMP_FOLDER
 
find $WEBCAM_DIR/2010* -mtime +10 -exec rm -rf {} \;
find $WEBCAM_DIR/cam* -mtime +10 -exec rm -rf {} \;

Finished Project

Finished project is located at:

Retrieved from "http://www.initq.com/index.php/Webcam_Project_with_Time-lapse"
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