On Sun, Jun 7, 2015 at 11:57 AM Dan Dennedy <d...@dennedy.org> wrote:
> I will work on it this week, and then integrate it into Shotcut to verify > it works sufficiently. > > JB, Here is the new Mlt::Animation API plus some unit tests showing how to use it (to some degree). I pushed it into a branch for now: https://github.com/mltframework/mlt/commits/animation Beyond our previous discussion, I added some methods to get the number of keyframes and get information for a keyframe by index (as opposed to frame position). This makes it easier to iterate over them or to use in a Qt model class. It is important to think of this API as a supplement to the Properties API. You get the animation from the property, and then the animation API provides an object-oriented, exploded view of the animation. In addition, it lets you do the one main manipulation you cannot do through properties: remove a keyframe. I avoided exposing things that really only mlt_properties really knows about: namely, mlt_property but also fps and locale_t. Anything value-related, such as insertion and value retrieval, should go through Properties. Some seemingly redundant methods are there to make it nicer to work with from C++ versus a scripting/managed language. For example, Properties::get_animation() is nicer from C++ to avoid using a pointer. But, Properties:;get_anim() is for Python.
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