[gst-devel] Videomixing two/multiple webcams side by side

Michael Joachimiak mjoachimiak at gmail.com
Wed Jun 9 08:50:49 CEST 2010


USB cameras are a little bit bad since they don't provide a constant
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
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?

2010/6/7 Luciana Fujii Pontello <luciana at holoscopio.com>

> 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
> 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:
> http://git.holoscopio.com/?p=sltv.git;a=blob;f=sltv/videomixer.py;hb=HEAD.
> 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:
> http://git.holoscopio.com/?p=sltv.git;a=blob;f=sltv/videomixer.py;h=91e8d0bdd59d1a0c1a3718cbc29ebe5018f16b33;hb=2cabc48c982650dd0d3f69499374fa2e46a11e31
> I have a small test case in http://holoscopio.com/~fujii/testpip.py<http://holoscopio.com/%7Efujii/testpip.py>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 - http://holoscopio.com
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Your Sincerely
Michael Joachimiak
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