Get the "natural" framerate of this.
This is to say, for example for a VideoUriSource the framerate of the source.
Note that a AudioSource may also have a natural framerate if it derives from the same SourceClip asset as a VideoSource, and its value will be that of the video source. For example, if the uri of a UriClip points to a file that contains both a video and audio stream, then the corresponding AudioUriSource will share the natural framerate of the corresponding VideoUriSource.
this |
The TimelineElement to get "natural" framerate from |
framerate_n |
The framerate numerator |
framerate_d |
The framerate denominator |
Whether this has a natural framerate or not, |