Hi everybody,

I'm searching how to code new effect or transition in KDEnlive (with C language I imagine ?) and then put it in KDEnlive.
Is there any tutorial on it ?
I noted that MLT was used for video-effect...
Google wasn't my friend for this research
Thanks in advance !

i also want to know that.

As you noted, all the effects and transitions in Kdenlive comes from Melt (https://github.com/mltframework/mlt)

For example if you look at the effects, there is a special folder with filters designed for kdenlive (example https://github.com/mltframework/mlt/blob/master/src/modules/kdenlive/filter_wave.c)
As you see, the filter itself is quite straightforward, you have to provide an initialization function and a processing function.

May I ask if you have a particular filter/transition in mind ? Note that if your effect can be achieved as a combination of several other filters that already exist, you can contribute an effect group in kdenlive.

alcinos wrote:As you noted, all the effects and transitions in Kdenlive comes from Melt (https://github.com/mltframework/mlt)

For example if you look at the effects, there is a special folder with filters designed for kdenlive (example https://github.com/mltframework/mlt/blob/master/src/modules/kdenlive/filter_wave.c)
As you see, the filter itself is quite straightforward, you have to provide an initialization function and a processing function.

May I ask if you have a particular filter/transition in mind ? Note that if your effect can be achieved as a combination of several other filters that already exist, you can contribute an effect group in kdenlive.

very thank you Alcinos!