<div><br></div><div>Here are some links I found by googling "alpha gstreamer" or "alpha blending gstreamer", perhaps they will help some...   I guess the "alpha", "videomixer" elements will be the most important for you to review further.</div>
<div><br></div><a href="http://www.oz9aec.net/index.php/gstreamer/347-more-gstreamer-tips-picture-in-picture-compositing" target="_blank">http://www.oz9aec.net/index.php/gstreamer/347-more-gstreamer-tips-picture-in-picture-compositing</a><br>

<div><br></div><div><a href="http://noraisin.net/diary/?p=40" target="_blank">http://noraisin.net/diary/?p=40</a><br></div><div><br></div><div>Good luck!</div><div><br></div><div>Matthew</div><div><br></div>
<div class="gmail_extra"><br><br><div class="gmail_quote">On Mon, Dec 3, 2012 at 3:06 PM, Corneliu Ticu <span dir="ltr"><<a href="mailto:corneliu.ticu@gmail.com" target="_blank">corneliu.ticu@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hi everybody,<br>
<br>
Is there any possibility to do simple video channel arithmetics with a gst-launch command?<br>
I would like to add a 420p video to another one.<br>
Like a transparent watermark.<br>
<br>
Thanks<br>
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</blockquote></div><br><br clear="all"><div><br></div>-- <br>Matthew<div><br></div><br>
</div>