[Kdenlive-devel] effects

[Marco]

Am Dienstag 21 Oktober 2008 21:09:55 schrieb Dan Dennedy:
> On Tue, Oct 21, 2008 at 10:16 AM, Marco <g.marco at freenet.de> wrote:
> > Hi
> >
> > i wrote the frei0r plugin for mlt.
> > The Problem with frei0r is (i wrote richard spindler that too):
> > the frei0r plugins does not give back the param range. So some plugins
> > have values vom -x to +x, some from 0 to x, and some from x.y to
> > z.a.(double/int , negative/positive)
>
> MLT does not provide something like this either through an API.
> Arguably, its not required to be in API.
as i remember mlt metadata can use FLOAT, INTEGER for the value type ?
also a min, max value can be set (if i'm right).

so mlt is not the problem, frei0r is.

>
> > A Fix is also not in sight.
> >
> > Idea: store in an extra file these values (but not so good for new
> > plugins, that come later)
>
> For MLT, I designed the metadata system. The system is in place with
> API to access it, but the metadata is very much incomplete.
>
> http://mltframework.org/twiki/bin/view/MLT/MetadataRequirements
>
> Something could be made for frei0r as well completely as a wrapper to
> frei0r, call it morefrei0r ;-). Then, the MLT module can bridge the
> metadata. I know kdenlive has its own effects system, but I have not
> looked into its details yet to know what can be done there. I planned
> to look into it to learn from its real world experience and perhaps
> revise the MLT metadata schema.