it means I have to do a sort of split? I have .avi, .flv files for instance, whose properties are set on each gnlfilesource accordingly.<br>Greets,<br><br>Rosssana<br><br><div class="gmail_quote">2011/9/29 Rossana Guerra <span dir="ltr">&lt;<a href="mailto:guerra.rossana@gmail.com">guerra.rossana@gmail.com</a>&gt;</span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">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 &#39;plug&#39; them?<br>I&#39;ll try to work around what you said.<br><br>Regards<br><font color="#888888"><br>Rossana</font><div><div>
</div><div class="h5"><br><br><br><div class="gmail_quote">2011/9/29 Nicolai Hess <span dir="ltr">&lt;<a href="mailto:nicolaihess@web.de" target="_blank">nicolaihess@web.de</a>&gt;</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>2011/9/29 Rossana Guerra <span dir="ltr">&lt;<a href="mailto:guerra.rossana@gmail.com" target="_blank">guerra.rossana@gmail.com</a>&gt;</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>
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>
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<br></blockquote></div><br>AFAIK, you need two separate gnlsource objects, one for video and one for audio.<br><br>
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