I'm doing a golf video of my girlfriend's brother where the ball has a light trail coming off it. The video provided is showing a simplified version of everything so it'll be easier to follow.
I have an emitter in Particular keyframed to follow the golf ball frame by frame and emit particles. Now of course, I want the light trail to remain for a few seconds, but during that few seconds, the light trail isn't tracked to the camera's jittery movements, yet it already has position keyframes.
I was thinking I could keyframe the emitter's position like normal, then precompose the layer. After that I would track the source footage, create a null, then parent the precomped emitter layer to the null's subsequent tracking data. However, when I do that, it makes the particle's position in relation to the emitter wildly off. It sooort of tracks correctly with the source footage, but does not follow the emitter (and as a result, where the golf ball is going).
BONUS PROBLEM: As you can see in the video, I have some strange problem that occurs rarely where the particles at the very beginning of the emitter trail refuse to render, even though they seem to flash in and out of existence under certain conditions. The emitter is actually starting where the ball is resting on the tee, and it's supposed to start from the second the ball leaves the tee, not a few "feet" after the ball leaves the tee as is shown in the video.