Connect points of motion tracks with (smoothed) lines I am tracking motions with blender, and adding motion trails to tracked objects. With hq slow motion footage, just attaching an empty vert with a particle effect to my track works very well. However, when the frame rate is not very high, the tracker will be quite far apart frame to frame and I end up with what looks like a dotted line because the emitter jumps from one tracker location to the next. I would like to bridge the gap either with more particles or just a line.
How can I distribute more particles between the current and previous/next tracker location? Maybe I have to convert the track into a path or a line (I can't figure out how)? Basically what i want to achieve is a smooth gap-less motion trail even when the tracked object moves quite a bit between frames. Grateful for any advice, thank you.
Tracking information creates a constraint. 

To convert constraints into keyframes, open the constraint section of the properties window and press Constraint to f-Curve



The tracking information will be converted to keyframes, the curves for those keyframes can be displayed and manipulated on the Graph Editor.



There are a few built in tools to clean up curves in the key menu of the Graph Editor.

Here's the same motion path after applying the "Clean Keyframes" function: