<!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 mercredi 15 janvier 2014 à 17:20 +0100, Sebastian Dröge a écrit : <BLOCKQUOTE TYPE=CITE> I would recommend converting to a video format with alpha channel with videoconvert before the alpha element if that is a concern. </BLOCKQUOTE> Sorry, didn't saw your reply, really ? I thought we had some code in alpha to be more efficient doing that ? I guess you know more then me on that, though I'll inform the PiTiVi GES people, measurement would be nice. cheers, Nicolas </BODY> </HTML>