<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 TRANSITIONAL//EN"> <HTML> <HEAD> <META HTTP-EQUIV="Content-Type" CONTENT="text/html; CHARSET=UTF-8"> <META NAME="GENERATOR" CONTENT="GtkHTML/4.6.6"> </HEAD> <BODY> Le vendredi 21 mars 2014 à 09:27 -0700, morris.yang a écrit : <BLOCKQUOTE TYPE=CITE> When changing audio track for different audio format, I see the following sequence happening in my platform 1.video fast-forward just a little while 2.video stop 3.audio output 4.then video start to play How to let video play smooth at changing audio track? </BLOCKQUOTE> Please, provide version information of your GStreamer installation. Also let us know what you are using to change the track, is it using playbin ? Note that audio clock is preferred for synchronisation, hence the link between audio and video here. Providing more information will help us figuring out if it's a recent regression, but but in your application, or a ancient bug that has been fixed since. cheers, Nicolas </BODY> </HTML>