- \n
- Still images captured every 30 seconds<\/li>\n
- FLV movies of the day’s stills made every 5 minutes<\/li>\n
- A playlist that lets them browse through previous days’ activity for as long as we keep the movies around<\/li>\n<\/ul>\n
The programs and pages that make this mini-site follow below:
\n
\naxisgrab.py — extracts current image from the designated Axis camera, encodes today’s images into an FLV<\/p>\n\n#!\/usr\/bin\/python\n\nbasename='denso'\naxisip='192.168.0.1'\naxisuser='someuser'\naxispass='somepassword'\nflvcreator='TTU ME Department'\n\nimport urllib2, time, os, re, getopt, sys\n\ndef usage():\n print \"\"\"axisgrab.py -- grab or encode images from an Axis IP camera\nUsage: axisgrab.py --grab\n axisgrab.py --encode\n\"\"\"\n\ndef main():\n\n try:\n optlist, args = getopt.getopt(sys.argv[1:], 'g:e:',\n [ 'grab', 'encode' ])\n except getopt.GetoptError:\n usage()\n sys.exit(2)\n\n for opt, junk in optlist:\n if (opt=='--grab'): \n auth_handler = urllib2.HTTPBasicAuthHandler()\n auth_handler.add_password('\/',axisip,axisuser,axispass)\n opener = urllib2.build_opener(auth_handler)\n urllib2.install_opener(opener)\n axis_jpg=urllib2.urlopen('http:\/\/%s\/axis-cgi\/jpg\/image.cgi' % ( axisip ) )\n \n filename='%s_%s_%s.jpg' % ( basename, time.strftime('%Y%m%d'), time.strftime('%H%M%S') )\n local_jpg=open(filename,'w')\n local_jpg.write(axis_jpg.read())\n local_jpg.close()\n os.chmod(filename,0644)\n\n if (opt=='--encode'):\n os.system('mencoder -really-quiet -ovc lavc -lavcopts vcodec=flv -mf fps=25:type=jpg \\\\'mf:\/\/%s_%s*.jpg\\\\' -of lavf -lavfopts i_certify_that_my_video_stream_does_not_use_b_frames -o %s_%s.flv >&\/dev\/null' % ( basename, time.strftime('%Y%m%d'), basename, time.strftime('%Y%m%d') ))\n \n playlistname=\"playlist-%s.xml\" % ( basename )\n playlist=open(playlistname,'w');\n playlist.write(\"\"\"\n <?xml version=\"1.0\" encoding=\"utf-8\"?>\n <playlist version=\"1\" xmlns=\"http:\/\/xspf.org\/ns\/0\/\">\n <trackList>\n \"\"\")\n\n \n files=os.listdir(\".\")\n files.sort()\n repattern=\"%s.+flv\" % ( basename )\n recompiled=re.compile(repattern)\n for file in files:\n if recompiled.search(file):\n playlist.write(\" <track>\\n\")\n playlist.write(\" <title>%s<\/title>\\n\" % (file))\n playlist.write(\" <creator>%s<\/creator>\\n\" % (flvcreator))\n playlist.write(\" <location>%s<\/location>\\n\" % (file))\n playlist.write(\" <info>force_download.php?file=%s<\/info>\\n\" % (file))\n playlist.write(\" <\/track>\\n\")\n\n playlist.write(\"\"\"\n <\/trackList>\n <\/playlist>\n \"\"\")\n\nif __name__ == \"__main__\":\n main()\n<\/pre>\nindex.php — main web interface to the images and movies<\/p>\n
\n<?php\n \/\/ If I did all this correctly, you shouldn't have to change\n \/\/ anything but the basename variable.\n$basename = \"denso\";\n\n$today = date(\"Ymd\"); \/\/ e.g., 20070901\n$mediabase = $basename.\"_\".$today; \/\/ axisgrab.py stores images with this naming scheme\n$imagewidth = 480; \/\/ Controlled on the camera video\/image settings\n$imageheight = 360; \/\/ Controlled on the camera video\/image settings\n?>\n\n<!DOCTYPE HTML PUBLIC \"-\/\/W3C\/\/DTD HTML 4.01 Transitional\/\/EN\">\n<html>\n<head>\n<title>Denso Lab Camera Feed<title>\n<script type=\"text\/javascript\" src=\"swfobject.js\"><\/script>\n<script type=\"text\/javascript\">\nvar browser = navigator.appName;\nvar version = parseInt(navigator.appVersion);\n\nfunction showImage(object) {\n var imageToShow = object.options[object.selectedIndex].value;\n\n if (browser == 'Netscape') {\n if (version >= 3) document.dropImage.src = imageToShow;\n else alert('Your browser does not support the image object - sorry');\n }\n else if (browser == 'Microsoft Internet Explorer') {\n if (version >= 4) document.dropImage.src = imageToShow;\n else frames[0].location.href = imageToShow;\n }\n}\n\/\/--><\/script>\n<meta http-equiv=\"refresh\" content=\"300\">\n\n<\/head>\n<body>\n<table>\n<tr valign=\"top\">\n<td>\n<h1>Denso Lab Camera Footage<\/h1>\n\n<p>Select a day from the list below to play, or click the icon at the right of the filename to download.<\/p>\n<p id=\"player1\"><a href=\"http:\/\/www.macromedia.com\/go\/getflashplayer\">Get the Flash Player<\/a> to see this player.<\/p>\n<script type=\"text\/javascript\">\n var s1 = new SWFObject(\"mediaplayer.swf\",\"single\",\"480\",\"480\",\"7\");\ns1.addParam(\"allowfullscreen\",\"true\");\ns1.addParam('allowscriptaccess','always');\ns1.addVariable(\"file\",\"<?php echo \"playlist-\".$basename.\".xml\"; ?>\");\ns1.addVariable('displayheight','360');\ns1.write(\"player1\");\n<\/script>\n<\/td>\n<td>\n<h1>Still Images<\/h1>\n<form name=\"imageForm\">\n<select name=\"imageSelect\">\n<?php\nif ($dh = opendir('.\/')) {\n $files = array();\n while (($file = readdir($dh)) !== false) {\n if (substr($file, strlen($file) - 4) == '.jpg') {\n array_push($files, $file);\n }\n }\n closedir($dh);\n}\n\n\/\/ Sort the files and display\nsort($files);\n\nforeach ($files as $file) {\n echo \"<option value=$file>$file<\/option>\\n\";\n}\n?>\n<\/select>\n<input name=\"submitName\" type=\"button\" value=\"Show\" onClick=\"showImage(document.imageForm.imageSelect)\">\n<\/form>\n\n<SCRIPT LANGUAGE=\"JavaScript\"><!--\nif (browser == 'Netscape')\n document.write('<IMG SRC=\"<?php echo $mediabase.\"_0000.jpg\"; ?>\" NAME=\"dropImage\" WIDTH=<?php echo $imagewidth;?> HEIGHT=<?php echo $imageheight;?>>');\n else if (browser == 'Microsoft Internet Explorer') {\n if (version >= 4)\n document.write('<IMG SRC=\"<?php echo $mediabase.\"_0000.jpg\"; ?>\" NAME=\"dropImage\" WIDTH=<?php echo $imagewidth;?> HEIGHT=<?php echo $imageheight;?>>');\n else\n document.write('<IFRAME FRAMEBORDER=0 WIDTH=<?php echo $imagewidth;?> HEIGHT=<?php echo $imageheight\n;?> MARGINHEIGHT=0 MARGINWIDTH=0 SCROLLING=no SRC=\"<?php echo $mediabase.\"_0000.jpg\"; ?>\"><\/IFRAME>');\n }\n\/\/--><\/SCRIPT>\n<\/td>\n<\/tr>\n<\/table>\n<\/pre>\nswfobject.js and mediaplayer.swf are part of Jeroen Wijering’s JW Media Player<\/a>.<\/p>\n
Cron jobs on the webserver (to grab 2 images per minute):<\/p>\n
\n* * * * * (cd \/path\/to\/axis\/folder && .\/axisgrab.py --grab && sleep 30 && .\/axisgrab.py --grab)\n0,5,10,15,20,25,30,35,40,45,50,55 * * * * (cd \/path\/to\/axis\/folder && .\/axisgrab.py --encode)\n<\/pre>\n
<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"