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copied!<p>I am currently using GStreamer for a similar project (lecture-capture) myself. You are probably looking for the <a href="http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-good-plugins/html/gst-plugins-good-plugins-videomixer.html" rel="nofollow noreferrer">videomixer</a> element. Check out this example: <a href="http://blogs.gnome.org/halfline/2009/10/11/video-4-way-split-screen-gstreamer-pipeline/" rel="nofollow noreferrer">Video 4-way split screen gstreamer pipeline</a> (script is located <a href="http://git.gnome.org/browse/usability-lab/tree/eb1304-to-ogg.sh#n93" rel="nofollow noreferrer">here</a>).</p> <p>GStreamer works perfectly fine on Windows too. You may want to check out the <a href="http://www.gstreamer-winbuild.ylatuya.es/doku.php" rel="nofollow noreferrer">GStreamer WinBuilds</a> if you are interested. </p> <p><b>Example</b><br> Here's a basic script that works for me on Windows (it doesn't have the backslashes because I use the <a href="http://www.gstreamer.net/data/doc/gstreamer/head/gstreamer/html/gstreamer-GstParse.html#gst-parse-launch" rel="nofollow noreferrer">gst_parse_launch</a> call from C code to parse the pipeline description):</p> <pre><code> v0. ! queue ! decodebin ! ffmpegcolorspace ! videoscale ! video/x-raw-yuv,width=320,height=240 ! videobox right=-320 bottom=-240 ! ffmpegcolorspace ! vmix.sink_0 v1. ! queue ! decodebin ! ffmpegcolorspace ! videoscale ! video/x-raw-yuv,width=320,height=240 ! videobox bottom=-240 ! ffmpegcolorspace ! vmix.sink_1 v2. ! queue ! decodebin ! ffmpegcolorspace ! videoscale ! video/x-raw-yuv,width=320,height=240 ! videobox right=-240 ! ffmpegcolorspace ! vmix.sink_2 v3. ! queue ! decodebin ! ffmpegcolorspace ! videoscale ! video/x-raw-yuv,width=320,height=240 ! ffmpegcolorspace ! vmix.sink_3 vmix. ! queue ! ffmpegcolorspace ! dshowvideosink filesrc location="c:/test.mpg" name="v0" filesrc location="c:/test.mpg" name="v1" filesrc location="c:/test.mpg" name="v2" filesrc location="c:/test.mpg" name="v3" videomixer name=vmix sink_0::xpos=0 sink_0::ypos=0 sink_0::zorder=0 sink_1::xpos=320 sink_1::ypos=0 sink_1::zorder=1 sink_2::xpos=0 sink_2::ypos=240 sink_2::zorder=2 sink_3::xpos=320 sink_3::ypos=240 sink_3::zorder=3 </code></pre>

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