Scott, USB cameras are a little bit bad since they don't provide a constant framerate. It depends on the integration time (longer integration times -- lower framerate) . And integration time depends on changing light conditions. You can consider dropping all frames but latter in the stream to get them synchronize. If framerates will be different faster camera will be dropping and you will get constant framerate. I had the same problem before. In your chain function you can check the size of the buffer and if it has more than one frame you can take a pointer to the latest frame. Hmm.. But I guess you don't have your own plugin? Do you? This strikes another question. Is it possible to drop frames like I mentioned using videomixer? <div class="gmail_quote">2010/6/7 Luciana Fujii Pontello <<a href="mailto:luciana@holoscopio.com">luciana@holoscopio.com</a>> <blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div class="im">On Tue, 2010-05-25 at 13:01 -0700, scottmil wrote: > I would LOVE to see it. Is it posted somewhere it can be downloaded? > > Scott </div>I only received your e-mail today, so I don't know if this will still be useful. The module I use to mix 2 pipelines in a picture-in-picture is in here: <a href="http://git.holoscopio.com/?p=sltv.git;a=blob;f=sltv/videomixer.py;hb=HEAD" target="_blank">http://git.holoscopio.com/?p=sltv.git;a=blob;f=sltv/videomixer.py;hb=HEAD</a>. It does others crazy things (I use it as if it was the input-selector also), but it should not be a problem if you don't link more stuff to it. Actually, I think if you go back in time you can get a simpler version like this: <a href="http://git.holoscopio.com/?p=sltv.git;a=blob;f=sltv/videomixer.py;h=91e8d0bdd59d1a0c1a3718cbc29ebe5018f16b33;hb=2cabc48c982650dd0d3f69499374fa2e46a11e31" target="_blank">http://git.holoscopio.com/?p=sltv.git;a=blob;f=sltv/videomixer.py;h=91e8d0bdd59d1a0c1a3718cbc29ebe5018f16b33;hb=2cabc48c982650dd0d3f69499374fa2e46a11e31</a> I have a small test case in <a href="http://holoscopio.com/%7Efujii/testpip.py" target="_blank">http://holoscopio.com/~fujii/testpip.py</a> that is a good example and you can check the project repository to see how we use it for real. Regards, Luciana Fujii Holoscópio Tecnologia - <a href="http://holoscopio.com" target="_blank">http://holoscopio.com</a> <div><div></div><div class="h5"> ------------------------------------------------------------------------------ ThinkGeek and WIRED's GeekDad team up for the Ultimate GeekDad Father's Day Giveaway. ONE MASSIVE PRIZE to the lucky parental unit. See the prize list and enter to win: <a href="http://p.sf.net/sfu/thinkgeek-promo" target="_blank">http://p.sf.net/sfu/thinkgeek-promo</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </div></div></blockquote></div> -- Your Sincerely Michael Joachimiak