<!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 samedi 08 mars 2014 à 21:57 -0800, Ugly Face a écrit : <BLOCKQUOTE TYPE=CITE> when I play an mp4 file with appsrc , "GST_BUFFER_TIMESTAMP (buffer)" and "GST_BUFFER_DURATION (buffer)" are not set . I wonder if I need to set these parameters to get my sender pipeline works well? </BLOCKQUOTE> I cannot tell you with full confidence, though the idea is that the sink (udpsink) sync property should stay at default true, and base on timestamp, the sink will do the traffic shaping by waiting an appropriate time. Timestamp will most likely have to start at zero due to appsrc limitation. Nicolas </BODY> </HTML>