Motion Tracker

Loren C

Member Location: New Hampshire Joined: Jul 08, 2013 19:53 Messages: 86 Offline

Solved by

Dec 29, 2018 20:39

I have trouble getting my selection box ( White corner tags ) to follow the target through it's range.
It will lag, and go off target.
Making the box smaller just makes it worse. Making box real large helps some, but will still loose the target.

I'm using Blur, and Inverse to highlight a person on a moving ATV going from right of screen & slight distance away - to - left side of screen, and slightly closer. The movement on screen is real slow. ( Walking speed )

The box just follows a short time, then starts to lag, and go off target completly.

Secondly: There are 2 selection boxes. One with white tags, and another with blue tags. I can adjust size & position both.
I can't find anything about them in the "Motion Tracker" help .
I'd like to know how they are supposed to be adjusted, and just what each one does?

Thanks. Ageing Gracefully

optodata

Senior Contributor Location: California, USA Joined: Sep 16, 2011 16:04 Messages: 8630 Offline

Dec 29, 2018 21:14

For the tracking issue, please take a look at this guide which shows where the frame-by-frame tool is. Even though that example is with a 360 degree clip, the process is the same, and that will let you exactly correct the tracking problem.

For your second question, the white marker is always the tracker, and the blue marker is always the tracking object (text, image or effect). Your job is to set the blue object's size and location relative to the tracker. You can have them directly on top of each other, or offset in any direction, and the tracking object will always retain its relative position to the tracker.

Note that at any point during the tracking run, you can manually move the tracking object to a new relative position, and it will then track from there for the rest of the run.

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westar video jg

Newbie Joined: Dec 10, 2018 11:37 Messages: 4 Offline

Dec 30, 2018 05:56

Thank you I also have that problem....but also another I have many faces that moved in front of me while making a concert video. Now I want to blur faces. But soon it says I have reachedthe max allowed 7. How can I continue?

Quote For the tracking issue, please take a look at this guide which shows where the frame-by-frame tool is. Even though that example is with a 360 degree clip, the process is the same, and that will let you exactly correct the tracking problem.

For your second question, the white marker is always the tracker, and the blue marker is always the tracking object (text, image or effect). Your job is to set the blue object's size and location relative to the tracker. You can have them directly on top of each other, or offset in any direction, and the tracking object will always retain its relative position to the tracker.

Note that at any point during the tracking run, you can manually move the tracking object to a new relative position, and it will then track from there for the rest of the run.

Loren C

Member Location: New Hampshire Joined: Jul 08, 2013 19:53 Messages: 86 Offline

Dec 30, 2018 15:28

Quote For the tracking issue, please take a look at this guide which shows where the frame-by-frame tool is. Even though that example is with a 360 degree clip, the process is the same, and that will let you exactly correct the tracking problem.

For your second question, the white marker is always the tracker, and the blue marker is always the tracking object (text, image or effect). Your job is to set the blue object's size and location relative to the tracker. You can have them directly on top of each other, or offset in any direction, and the tracking object will always retain its relative position to the tracker.

Note that at any point during the tracking run, you can manually move the tracking object to a new relative position, and it will then track from there for the rest of the run.

Thanks!
When I try clicking on the "frame-by-frame" button, I don't see anything happen. Does it just sequence the video forward, one frame each push? Or does something else have to be done? Ageing Gracefully

optodata

Senior Contributor Location: California, USA Joined: Sep 16, 2011 16:04 Messages: 8630 Offline

Dec 30, 2018 18:17

Quote Thanks!
When I try clicking on the "frame-by-frame" button, I don't see anything happen. Does it just sequence the video forward, one frame each push? Or does something else have to be done?

That's correct. The tool is now giving you the opportunity to make any necessary/wanted adjustments one frame at a time. It may actually be easier to cut the tracker just before it "goes off the rails" and manually track it for a few frames, then see if it will track from that point on.

That can be especially useful if something else comes into the tracking box and PD confuses it with the original object being tracked.

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Loren C

Member Location: New Hampshire Joined: Jul 08, 2013 19:53 Messages: 86 Offline

Dec 30, 2018 20:15

Quote

That's correct. The tool is now giving you the opportunity to make any necessary/wanted adjustments one frame at a time. It may actually be easier to cut the tracker just before it "goes off the rails" and manually track it for a few frames, then see if it will track from that point on.

That can be especially useful if something else comes into the tracking box and PD confuses it with the original object being tracked.

Thanks! Appreciate the help.
Motion Tracker doesn't really seem to "track" very well. (Not like in their video!) My object is moving really slow, and is of good contrast to background. The tracking just drifts off target as the object moves across the screen.
I can't help but think it will be of no use with an object moving with any speed, greater than a walk.

I'll probably not be able to use it for much other than blocking a licence plate, or such. Ageing Gracefully

optodata

Senior Contributor Location: California, USA Joined: Sep 16, 2011 16:04 Messages: 8630 Offline

Dec 30, 2018 20:29

Sounds like you may want to try experimenting a little more with the white rectanlge size.

In my experience, the trackers do a decent job at regular and fast motion, as seen around the 30 sec mark in this video showing a problem with PD17 "ghosts" if you use the same clip more than once for Motion Tracking:

Warry

Senior Contributor Location: The Netherlands Joined: Oct 13, 2014 11:42 Messages: 853 Offline

Dec 31, 2018 05:17

Thank you I also have that problem....but also another I have many faces that moved in front of me while making a concert video. Now I want to blur faces. But soon it says I have reachedthe max allowed 7. How can I continue?

That sometime happens weststar video jg, when you jump on the topic wagon :

, you got forgotten. My solution would be either to blur as many faces is you can, then produce the clip and import it to blur another set of faces, product, import, etc, etc. You have to mind the quality of the production and don't mind that potentially the quality drops.
The other solution would be, depending on the composition of the set of faces, to blur out the whole region of faces/people which makes the focus on the subject of your clip more obvious too!

Have fun.

Loren C

Member Location: New Hampshire Joined: Jul 08, 2013 19:53 Messages: 86 Offline

Dec 31, 2018 11:42

I picked a different spot for my (white-box) target. I made the box quite small, and it was on a " black wheel-Hub" that was surrounded with a larger orange background color. It tracked quite good.

Then I created a larger (blue-box) over the subject I wanted to follow, and blur.

The result was better. I quess the first target should be higher contrast to it's surroundings. I was selecting a larger target that stood out from the overall screen. The follow would move around on the larger target, making my second (blur) target go off track.

Things worked better this way. I'll try other sceens to practice. I have more fath in the Motion Tracker now.

I can see how problems can be had with objects mixed in with similar backgrounds.

Thanks everyone! Ageing Gracefully

optodata

Senior Contributor Location: California, USA Joined: Sep 16, 2011 16:04 Messages: 8630 Offline

Dec 31, 2018 11:53

Quote That sometime happens weststar video jg, when you jump on the topic wagon :

, you got forgotten. My solution would be either to blur as many faces is you can, then produce the clip and import it to blur another set of faces, product, import, etc, etc. You have to mind the quality of the production and don't mind that potentially the quality drops.

In fact, WVJG had already started a thread on that subject and had been given the same advice by two other members, but stated that the solution "did not work" and apparently decided to jump in on this topic too

Warry

Senior Contributor Location: The Netherlands Joined: Oct 13, 2014 11:42 Messages: 853 Offline

Dec 31, 2018 13:01

Indeed, I have missed that, sorry, and I see that I appear to have given the same suggestions. Looking forward to see whether they have led to something good.