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-+ ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Mlt-devel mailing list Mlt-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mlt-devel
