Exif init.php
exif_init.php - Exif template generator for Elphel 353 series cameras
This is a PHP script that runs before starting the [Imgsrv|imgsrv] image server. In the current setup it is executed as a part of startup script when /etc/init.d/imgsrvd is executed:
... 8 php-fcgi -q /usr/html/exif_init.php >/dev/null 9 start_daemon /usr/local/sbin/imgsrv -p 8081 ...
and the generated template file /var/state/exif.template is read in only once - at the imgsrv start up. So if you want to modify the Exif data attached to the camera images, you will need to re-run the script and kill the imgsrv (it will be respawned automatically). The script can be rerun with opening url http://<camera_ip>/exif_init.php, where <camera_ip> should be replaced with the actual camera IP address.
The Exif data source is described in the array:
$Exif=array ( "IFD" => array( array(0x010e,2,"Description 0x41 bytes long "), //Description array(0x010f,2,"Elphel, Inc."), // Manufacturer array(0x0110,2,"353 "), // Model TODO: make more intelligent guess - what camera is it array(0x0131,2,getSoftware()), // Software - "ls /usr/html/docs" array(0x0132,2,"2001:06:21 12:00:00","len"=> 20), //date/time modified, always use 20 bytes array(0x013b,2,getSerial()), // "bootblocktool -x SERNO" - add colons array(0x8769,4,0) // address of subIFD ), "SUB_IFD" => array( array(0x829a,5,array("nominator"=>1,"denominator"=>10000)), // exposure time array(0x9003,2,"2001:06:21 12:00:00","len"=> 20), //date/time original time created, always use 20 bytes array(0x927c,1,0,"len"=> 36), //!Manufacture custom data - raw data from the frame_params_t structure array(0x9291,2,"0 ") //original time sub-second ) );
It is possible to modify/add more tags, the script will parse it and prepare the template (see imgsrv for the description of dynamic tags that are needed for the imgsrv)