How to change title in infolabels during play?

Anybody know how to change title in infolabels while playing?

The same way you set them before playing. The trick is that you need to keep your script running while the content is playing, usually by "while xbmc.Player.isPlaying():"

I have my script playing in a while condition but when I change the infolabel the title is not changed and no error is given
# listitem = xbmcgui.ListItem("old title", iconImage="DefaultVideo.png", thumbnailImage=iconimage)
# listitem.setInfo('video', {'Title': "old title"})
# player = streamplayer(xbmc.PLAYER_CORE_AUTO)
# player.play(url, listitem)

# listitem.setInfo('video', {'Title': "new title"}) # this does not work. It still show the old Title after this

If I do this: (the new title is set) # this works but I don't want to restart the player
# player.stop()
# player.play(url, listitem)

I don't want to restart player to set new title. can this be done without restarting?