Fantastic! That worked and will allow me to answer many other questions for
myself in the future. Thank you very much.
On Mon, Apr 22, 2013 at 11:54 AM, Dan Dennedy <d...@dennedy.org> wrote:
> On Sun, Apr 21, 2013 at 11:39 AM, Rick Horowitz <rhorow...@ptflix.com>
> wrote:
> > I'm trying to figure out how to use the frei0r.curves filter in melt
> 0.8.8.
> > I am trying to increase the brightness/luma of a video. I got the
> parameter
> > values from kdenlive, but have been unable to replicate the effect in
> melt.
> > I only created one additional point in kdenlive Curves, with values
> x=502,
> > y=807.
> >
> > First, I tried to use regular Curves in melt:
> >
> > melt tmp1Front_00001.mp4 -filter frei0r.curves Channel=0.4 "Curve point
> > number"=0.3 "Point 1 input value"=0 "Point 1 output value"=0 "Point 2
> > input value"=.502 "Point 2 output value"=.807 "Point 3 input value"=1
> > "Point 3 output value"=1
> >
> > ...this seemed to have no effect.
> >
> > Then I tried to use the values directly from kdenlive instead of using
> x/y
> > values between 0 - 1, as indicated in the melt -query
> filter="frei0r.curves"
> >
> > melt tmp1Front_00001.mp4 -filter frei0r.curves Channel=0.4 "Curve point
> > number"=0.3 "Point 1 input value"=0 "Point 1 output value"=0 "Point 2
> > input value"=.502 "Point 2 output value"=.807 "Point 3 input value"=1
> > "Point 3 output value"=1
> >
> > ...this had an effect - the image got brighter, but did not look like the
> > image modified in kdenlive. Also, the Curves chart drawn in the image was
> > comprised of straight lines, rather than the curved line shown in
> kdenlive.
> >
> > Then I tried Bezier spline:
> >
> > melt tmp1Front_00001.mp4 -filter frei0r.curves Channel=0.4 'Bezier
> > spline=-1;-1#0;0#.1;.1|.356;.661#.406;.711#.456;.761|.9;.9#1;1#2;2'
> >
> > ...this seemed to have no effect on my image.
> >
> > Any suggestions? Thanks.
>
> Save the Kdenlive project, which is MLT XML, and read it.
>
> --
> +-DRD-+
>
--
Rick Horowitz
President, PTflix, LLC
603-812-2938
ptflix.com
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