Hi Nicolas, thanks for your response, I show the pipeline I am using. It does a transition-crossfade effect wich works prerfeclty, except sound (no sound) :<br><br>bin<br>-----------------------------------------------------------------------------------------------<br> alpha --------------------<br> |----------videomixer ------------ fmpegcolorspace<br> smptealpha ----------<br> ^<br> |<br>-----------------------------------------------------------------------------------------------<br> |<br> Controller // it controls the start-duration property of smptealpha<br><br><br><br>composition <br>--------------------------------------------------------------------------------------------------------<br> gnlfilesource<br> | gnloperation // contains the *bin* described above <br> | <br> gnlfilesource<br><br>--------------------------------------------------------------------------------------------------------<br> <br>gnlfilesource is for each video<br><br>pipeline<br>____________________<br> |<br> |<br>composition operation |___________ queue ___________ sink<br>___________________ |<br> <br>According to this pipeline it need another gnlsource for each video, then, how I 'plug' them?<br>I'll try to work around what you said.<br><br>Regards<br><br>Rossana<br><br><br><div class="gmail_quote">2011/9/29 Nicolai Hess <span dir="ltr"><<a href="mailto:nicolaihess@web.de">nicolaihess@web.de</a>></span><br> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><br><br><div class="gmail_quote"><div><div></div><div class="h5">2011/9/29 Rossana Guerra <span dir="ltr"><<a href="mailto:guerra.rossana@gmail.com" target="_blank">guerra.rossana@gmail.com</a>></span><br> </div></div><blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204, 204, 204);padding-left:1ex"><div><div></div><div class="h5"> Hi, I use gnlfilesource, gnloperation, alpha channels, videomixer,fmpegcolorspace I can play the videos correctly but I can not hear the sound. If I play the video with any other application it works fine (image and sound).<br> What did I miss to set?<br><br>Thanks<br><font color="#888888"><br>Rossana<br><br> </font><br></div></div>_______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a><br> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><br> <br></blockquote></div><br>AFAIK, you need two separate gnlsource objects, one for video and one for audio.<br><br> <br>_______________________________________________<br> gstreamer-devel mailing list<br> <a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a><br> <a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><br> <br></blockquote></div><br>