A few minutes ago I tried to add some music to my N900 for my girlfriend. Unfortunately the media player doesn’t automatically scan for new media (or it takes a while?). If you want to force the N900 to re-index everything just invoke this command in your X Terminal (or via SSH):
tracker-processes -r Found 136 pids... Setting database locations Checking database directories exist Checking database version Checking database files exist Removing all database files Removing database:'/home/user/.local/share/tracker/data/common.db' Removing database:'/var/tmp/tracker-user/cache.db' Removing database:'/home/user/.cache/tracker/file-meta.db' Removing database:'/home/user/.cache/tracker/file-contents.db' Removing database:'/home/user/.cache/tracker/email-meta.db' Removing database:'/home/user/.cache/tracker/email-contents.db' Setting index database locations Checking index directories exist Checking index files exist Removing all database index files Removing database index:'/home/user/.cache/tracker/file-index.db' Removing database index:'/home/user/.cache/tracker/email-index.db'
And after a few minutes (the player will show your) your music/video collection will be up to date!