just as a reference, Premiere also uses a negative flag to invert Speed of a clip. perhaps they've faced similar issues... :)
g 2011/9/16 Dan Dennedy <dan at dennedy.org> > On Fri, Sep 16, 2011 at 3:27 AM, Marco Ciampa <ciampix at libero.it> wrote: > > On Thu, Sep 15, 2011 at 02:41:41PM +0200, Elbground Multimedia wrote: > >> Hi Dan & other developers, > >> > >> Still a layman and ignorant of anything beyond using the User > >> Interface, one question: > >> If it already is integrated in the speed effect, why can't it simply > >> be applied by entering a negative speed percentage (i.e. -100 for 1:1 > >> reverse motion) in the speed effect parameters? That, to me, seems the > >> easiest and most conventional (i.e. similar to other applications such > >> as Final Cut) way to solve the issue. > >> > >> Kind regards, Ingar > > > > naaaaahhhh too simple! ;-) > > Heh. It is only simple to make the UI widget permit negative numbers. :-) > > My first kdenlive patch submission a long time ago used negative > speed. The problem is that the speed is used to calculate an effective > duration throughout many places of the Kdenlive code. Therefore, with > negative speed, you get a lot of places with negative duration! My > patch addressed most of those by using the speed's absolute value, of > course. But there were some unaddressed corner cases making the patch > incomplete, and I was busy with MLT. > Now, another way is to convert negative to a reverse flag, which MLT > also accepts. I recently looked into that, and there are several > places in Kdenlive code that need to be touched to carry and handle > the reverse flag. Alas, I remain busy with MLT and not being that > fluent with the kdenlive code and being this close to release, I did > not want to introduce that change at this time. > > -- > +-DRD-+ > > > ------------------------------------------------------------------------------ > BlackBerry® DevCon Americas, Oct. 18-20, San Francisco, CA > http://p.sf.net/sfu/rim-devcon-copy2 > _______________________________________________ > Kdenlive-devel mailing list > Kdenlive-devel at lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/kdenlive-devel > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://mail.kde.org/pipermail/kdenlive/attachments/20110916/7202ae9d/attachment.html>
