I've just commited a plugin that enables to manage evolving timefronts in Cinelerra.
Basically the idea is that different parts of video move trough time with different speeds and those speeds can change also. It is primarily useful for footage from static camera, where you want to speed up/slow down gradually just part of the picture, an example is here: http://www.kiberpipa.org/~minmax/timefront2.mov where the middle pair dances slower than other two... Also possible is interesting way of embedding titles with that approach, for example you can put titles on video of the fire in that way, but here is a simpler one: http://www.kiberpipa.org/~minmax/timefront3.mov The idea is based on this article: http://www.vision.huji.ac.il/videowarping/HUJI-CSE-LTR-2005-10_etf-tr.pdf Some more advanced stuff (that cannot be done with this plugin) is displayed here: http://www.vision.huji.ac.il/videowarping/) Yes, it is slow. It can be speeded up in cinelerra, by turning the caching on, but this means source code editing. I'll see if it is sensible to enable cache at all times... The only remaining thing i plan to do is to make applying masks possible at the beinning of track rendering istead at the end (by adding a switch), which makes some other tricks with effects possible, that are currently not, but mainly for the Timefront plugin it enables user to edit timefront by using masks... Anyone interested in documenting this plugin in wiki? Bye Andraž _______________________________________________ Cinelerra mailing list [email protected] https://init.linpro.no/mailman/skolelinux.no/listinfo/cinelerra
