How to use the "about-to-finish" signal?

[panda_user]

Hi all,
  I have a project on a gstreamer player.
In my code I use the "about-to-finish" signal of playbin2 to change the uri.
But I met a problem ,I found the next movies can not play smoothly.

Do I need to quit the mainloop ,free the pipeline and rebuild it ?

my pipeline :
gst-launch playbin2 uri="file:///myfile.mov" video-sink=pvrvideosink

in player process:
...
g_signal_connect (player->pipeline, "about-to-finish", G_CALLBACK
(player_change_file),player);
...

signal handle:
static void player_change_file(GstElement *pipeline,PLAYER_PLUGIN *player)
{
    player->uri = get_new_uri();//get the next uri for player
    g_object_set (player->pipeline, "uri", player->uri , NULL);

}

Pls:
The  black borders of the movie sometimes show blurred screen,
What can I do for it?

Regards!
Charlie

--
View this message in context: http://gstreamer-devel.966125.n4.nabble.com/How-to-use-the-about-to-finish-signal-tp4360554p4360554.html
Sent from the GStreamer-devel mailing list archive at Nabble.com.