Guide for making an IndyCam 'picture' in a WWW page
or using an IndyCam to provide WWW clients with a picture on demand
If you want to use the IndyCam on your Silicon Graphics Computer to take 'snapshot' pictures and post them to Internet clients who are accessing your web server:
(1) Add a link to an HTTP document called: http://name.of.your.webserver/cgi-bin/picture.
(2) Put a file called 'picture' in the cgi-bin directory of your web server. My directory is: /var/www/cgi-bin, for example.
make ~/cgi-bin/picture '-rwxr-xr-x'
'picture' contains the script:
#!/bin/sh
name=$REMOTE_HOST
cd /tmp
/usr/sbin/vidtomem -f $name 1> /dev/null 2>&1
/usr/sbin/imgcopy ${name}-00000.rgb ${name}.jpg 1> /dev/null 2>&1
echo Content-type: image/jpeg
echo
cat ${name}.jpg
rm -f ${name}*
I thank Robert Harris R.M.Harris@msm.cam.ac.uk for writing and debugging this script.
Further information
For those who have a Silicon Graphics support contract and so can access SGI 'Pipeline' articles, there is more information about putting video clips and snapshots on a Web page at http://support.sgi.com/surfzone/content/pipeline/html/19990201VideoWeb.html
Lachlan Cranswick has advice on web cams including sample scripts, information on dynamically altering shutter speeds and publishing pictures of difficult subjects, such as the sky.
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