Hello Suresh KC,
You can use the qoperation execute -af subclient.xml -appName 'File System' -clientName XXXX -backupSetName defaultBackupSet(?) which will give you the information you want, i think. You can create, maybe, a script for read this XML's and based on the information work it and make your stuff.
<?xml version="1.0" encoding="UTF-8"?>
I have made some similar where i run this for all clients and read each XML and output the information for one CSV.
Did i helped you?