gstreamer Python and cairooverlay

RoyWiggins roywig at
Sun Dec 30 19:28:17 PST 2012

I was in touch with Jon Nordby (who wrote it in the first place) and he
thinks it's because I was using the older pyGTK bindings rather than
pygobject- pycairo doesn't use gobject, it uses its own wrapper, which
explains it.

So, I'm trying to get it to work in GStreamer 1.0, which Jon suggested-
however, it doesn't seem to *have* cairooverlay, even though I've installed
gstreamer1.0-plugins-good from the developers ppa (on Ubuntu 12.04), it
seems to be there in the
but gst-inspect-overlay0.10 doesn't list cairooverlay, or indeed
cairo-anything. I poked around the .deb and it does not appear to be there
but I'm not very familiar with the structure of .deb packages. I guess the
deb might be slightly out of juncture?

(Also, gstreamer was complaining about the jack audio server not being
installed- I installed the package from the Ubuntu main repo and started
jackd myself and it worked, but it ought to be a dependency resolved by the
gstreamer package, right?)

On Sun, Dec 30, 2012 at 2:32 PM, Tim-Philipp Müller-2 [via GStreamer-devel]
<ml-node+s966125n4657622h61 at> wrote:

> On Sat, 2012-12-29 at 00:36 -0800, RoyWiggins wrote:
> Hi Roy,
> > Hi gstreamer folks, I'm having this exact problem and haven't found
> > remedy elsewhere. I can't say if it's a problem with the python
> > gstreamer bindings, or cairooverlay itself, or indeed both, but I
> > thought you guys might be able to give me a hand. I'm not averse to
> > trying to fix the binding if it needs fixing, but again I'm entirely
> > new to delving into python C bindings.
> I can't see anything wrong in the cairooverlay element right now, it
> passes the right GType when registering the signal, so my guess is that
> it's an issue somewhere in/around pygobject.
> Or possibly you are just missing the right import statement for the
> cairo gobject stuff?
> Cheers
>  -Tim
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