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[Miklós Máté <mtmkls@xxxxxxxxxxx>]

I don't think clutter will improve the situation. Goocanvas uses Cairo,
which in turn uses XRender, which is hardware-accelerated by nearly all
drivers. Clutter on the other hand uses OpenGL, and no one knows if it
works without 3d acceleration. Also see this thread:
http://old.nabble.com/clutter-or-goocanvas-for-PiTiVi-td17221802.html

Moreover, scrolling and working with clips are OK, just zooming is slow,
thus it might not be Goocanvas' fault.

-- 
zooming is slow
https://bugs.launchpad.net/bugs/550449
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Developers, which is subscribed to OpenShot Video Editor.

Status in OpenShot Video Editor: Confirmed

Bug description:
Zooming is quite slow and does not follow the zoom slider interactively. The two magnifier glass buttons are better, but it takes almost a second to update the timeline (with a dozen clips on 4 tracks, ``simple'' theme) on a 2.8GHz P4.

Furthermore, the fully-zoomed-out position on the zoom slider should adapt to the length of the project.