Paolo Valtorta schrieb:
In the timeline curves (fade, camera X, camera Y, etc) the movement between
points is a sine law (I believe).
sort of. Actually this kind of curve is called a bezier curve. It
has the special property that you can influence the slope and curvature
by dragging so called control points. The curve reacts to this like
a rubber band.
It is a well known problem of cinelerra that the discoverability
of this feature is bad, i.e. a lot of users never figure out that
there *are* control points. Indeed, each segment between two keyframes
has two control points.
You need sort of activate these control points by dragging with the
mouse while holding the ctrl key. Initially, they are located exactly
on top of the keyframes, and because of that, you can't see them.
Is it possible to get a linear movement?
yes. either by adjusting the control points accordingly, which is tedious.
If I recall correct, the current verison of cinelerra has also a function
somewhere in the menus, where you select a range and then can linearise
all segments in this range.
hope that helps
Cheers,
Hermann V.
PS: several aspects of the handling of these bezier curves in cinelerra is
clumsy and uncommon, compared to what usual graphics applications provide.
Some years ago, I wrote an extensive patch set to improve some of these
aspects. This patch set still applies to the current CV-version of
Cinelerra (V 2.1). Unfortunately this patch set required me to change a
lot of related and not so relate things, thus, due to the current development
situation of Cinelerra it was never accepted into the CV-Version, (and I
understand that quite well), because it would be an impediment to merge
further changes from the upstream author (HV).
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