Motion tracking and chroma key

I shot a webmercial and during the product demonstration (on an iphone) the screen of the application is very close to the color of the green screen. I am having a hard time keying due to the similarity in colors. I duplicated the clip and created a bezier mask around the LCD screen of the iPhone, and tried to apply the motion tracking behavior in Motion, but it's not working well. Any ideas anyone, or a better way to do this?
Thanks!

Umm, okay, it's a closeup of the iPhone, Apple will like that.
You may be approaching this all wrong or I'm still not understanding but try to think of the hand and the phone as a single object. All you need to do is not apply the greenscreen keyer to the hand-arm-phone object. You can protect that object by using a hand-drawn matte (also known as a garbage matte) but you can create a protection matte many different ways including pulling a hard luma key.
Here is one approach (if Patrick was tuned in, he'd have another, much more elegant, suggestion for you):
You have a your video as a layer, yes, you apply the green keyer to it and part of the phone screen drops out, too. That's okay, you're going to fill the phone back in with itself.
You place another copy of your video on top (or even underneath) and you draw a mask around the screen of the phone. Doesn't need to be precise. Maybe you need to keyframe the mask position a few time, maybe you can attach the mask to a tracker. But all you're doing with the mask is allowing the keyed video to show everywhere exept in the mask or, if you apply your mask to the keyed video below, you're just allowing the clseup shot to be seen through the hoel from below.
Umm, clear as mud, I know. The point I'm trying to make is the task is probably not as complex as you're thinking it is.
If you were using AE, you'd use a four corner motion tracking setup with trackers in each corner of the screen.
PS: Thank you for the kind words, mostly I ust pi$$ folks off around here.
bogiesan

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Help with Motion Tracking and Masking?

Hi. First and probably only post here. I've got a bit of an issue....
I'm trying to create "snapshots" in my video that are created from masks which are then motion tracked and remain stationary. Here's a video of what i'm talking about... http://www.youtube.com/watch?v=9OhVAduuJc8
The problem I'm running into is that after i motion track the layer, select a null object as the target, duplicate the video layer, mask the object, freeze frame, and pair it to a null layer, the object does not remain stationary as the ones in the video do. Instead it moves WITH the null object and I cant figure out why. I've gotten a tutorial from the guy who made the video, however it's private so i don't know if you guys will be able to see it. http://www.youtube.com/watch?v=zY0QLrMCcGM
Either way, i followed the tutorial exactly and still to no avail. Are my settings messed up or what exactly is going on? Ive successfully done this project before but now that i'm using CS5, i'm running into these issues. If anyone has any advice i'd gladly try it out and return with the results.
Thanks so much for trying to help me out.

Yeah the null is still moving. Will freezing it lock the mask into place while still allowing the footage to play through? And how would i go about "freezing the null"?
I just dont understand how this person does it in the tutorial, and the mask remains in place. I know you probably can't watch the tutorial cause the user has it set as private, but as far i know his mask stays in place, but uses the null (while still moving) as a tracking device to keep the mask from floating out of control as the camera moves through the shot.
Sorry if I'm making this rather confusing. It's difficult to explain.
Maybe it might be easier to explain how you would obtain the result from the video I've posted? Keep in mind I dont have CameraTracker.

Intermittent problem with cross dissolve and chroma key

It seems that in 1 out of 10 videos I produce in Final Cut Pro there is a problem with the cross dissolve effect and chroma key. What happens is that during the cross dissolve, clip A fades out with a green tint and clip B fades in with a green tint.
Today I am working with two videos that I captured using the same work flow on the same day. One project exhibits the tint while the second project does not. If I import the problematic footage into the good project the tint problem follows the footage. In the good footage, the cross dissolve produces a result that does not have a green tint. If I re-capture the "bad" footage the results are the same.
Has anyone else experienced this and does anyone have an idea how to resolve this problem?
Thank you.
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In my project, both clips are source clips with Chroma, Color Smoothing and Matte Choker applied. A dissolve from non-chroma clip to chroma clip works fine. Only problem is with two chroma clips. In my dissolve, the error appears as red fringing in the area between the two masks.< </div>
You're using creative shorthand that doesn't help. "Chroma clip" means the clip to which you have applied all of these effects? What masks? Where are you getting the masks?
To understand what's going on with all them itty bitty pixels in a stack of interactive effects, do me a favor: render out a short piece, say 10 seconds of each of your chromaclips as separate movies over transparency using the Animation codec. Reimport them and put them over a solid colored Dissolve between them using different types of dissolves. Post back and tell us (me) what's going on.
I still consider this to be a bug -- nesting adds more steps to the workflow than if this bug did not exist. < </div>
It's not a bug. Your pixels are running down a pathway. It's a question of building the correct pathway and having the correct pixel wranglers with the right kinds of cattle prods.
bogiesan

Not sure how to explain but mac 27" desktop - keyboard and track pad safari and chrome keys pressed sending me different places

Basically, if iam opening an email in gmail it opens a tab for the email or if I am typing a password it opens documents. Trackpad and keyboard keys opening things I did not open. Please help. I've restarted twice and it isn't helping. I've replaced batteries. Thinking it's internal and not the keyboard or track pad. thank you.

Sorry it is hard to explain. I am working form my laptop bc I can't get anywhere on internet bc of keys and trackpad or open anything I want to open.
If I press anything on the dock it takes me to finder window. It lets me open from finder window
It started when Apple updated Safari
I've tried different browsers -same thing so I am thinking it's the computer.

Motion 3 - Motion Tracking and Match Move

Hi, I have no problem learning how to use motion tracking or match move because there's plenty of tutorials online. My question is, if let's say i motion tracked a clip to my original clip and half way through the movie an obstacle comes into the position where my motion tracked clip is. How do i make is so the obstacle appears in front of the motion tracked clip?
For example, take apple's motion 3 sample video.
http://www.youtube.com/watch?v=BwezKN_hFF4
The place where they put the GPS clip, if while the girl is driving she moves her hand in front of the GPS. How would we make it so that her hand appears in front of the GPS not behind it?
Any help would be appreciated,
Thank you

If I am understanding you correctly, it sounds like you are asking how to have an object that is part of the background layer appear in front of an object that you are going to composite in an match-move.
The only way to do that is to duplicate the background layer and move it in front of the layer you are bringing in, then create a mask around the portion of layer you want to keep (in the example you provide - the girl's hand).
You would have to go frame-by-frame and animate the mask to follow her hand - very time consuming but I don't see any other way.

IPhone 6 Motion Tracking and other Apps

Hi,
I really like that the iPhone 6 has the M8 chip that tracks steps all the time. I also use some other apps to track activity such as Runtastic and MyFitnessPal.
When I use Runtastic to track a run, I don't want the steps I take during that run to count in my regular step count. I have everything feed into MyFitnessPal and if I let the motion tracker add its steps it seems like it will duplicating parts with the running entry, giving me double credit whenever I run.
The question I have is there a way to pause the step tracking?
Thanks

Hi,
I really like that the iPhone 6 has the M8 chip that tracks steps all the time. I also use some other apps to track activity such as Runtastic and MyFitnessPal.
When I use Runtastic to track a run, I don't want the steps I take during that run to count in my regular step count. I have everything feed into MyFitnessPal and if I let the motion tracker add its steps it seems like it will duplicating parts with the running entry, giving me double credit whenever I run.
The question I have is there a way to pause the step tracking?
Thanks

Using motion tracking and time remapping to smooth pans?

Hi!
I shot some video with a cheap tripod and I'm not happy with some of the panning shots that I made. It came to my mind that it might be possible to smooth out the un-even speeds of those pans by tracking the footage and then using time remapping to make the movement smooth and constant. However, I don't know how to do the math in the right way. Has anyone tried this before? Is there maybe even tutorials on the subject?
Any help will be appreciated! Thanks!

I saw someone else thinking about the same solution on another forum so I decided to bump this a little bit.
The way I see it, this should be doable (unless there is something that I really dont understand).
The way it would work is this:
You have a panning shot of a stationary scene (no moving objects). You choose a track point that is visible during the pan and motion track that point. Then you look at the speed of that track point (how fast it is moving ie. from left to right) as pixels per seconds. And then you tie it to the time remapping property to make the speed (pixels per seconds) move in a constant manner.
The way I see it, there should be no black gaps when using a method like this, which kind of is why I'm interested in the consept. Because you are not moving the frame around spatially, you are simply changing the time it takes for a point to get from A to B.
What do you guys think?

DVCPRO50i and Chroma Key

Now that I can produce 4.2.2 footage what difference should I see when using chroma key and has anyone got any good tips on creating a good chroma key in FCP-6

4:2:2 sampling will produce cleaner keys than 4:1:1 or 4:2:0 due to increased color sampling, but the real "key" to keying is lighting both background for "evenness" and forground for separation. lighting angle is critical in the composite so that the keyed object matches the background it is being composited on to achieve a "believable" composite

Motion tracking and exporting layers with the background video

Is it possible to apply the motion tracking data to a new object in a new layer and then output, or export, that layer as an overlay plane (or perhaps in the alpha channel) so that the new object can be interactive (perhaps in a flash swf format)?
I would like to create an interactive layer of objects (created through motion tracking) above a background video layer.
Is After Effects the right tool for this job?

You are severely oversimplifying the matter. Interaction means establishing rules and this in turn requires programming. Ergo, you absolutely cannot avoid Flash and ActionScript. You can certainly do the tracking in AE and then use CS4's "Export to Flash" feature to get the raw setup into Flash, but the work doesn't stop there. For older versions of AE you will need alternate ways to import the tracking data, e.g. by ways of text files, but really, this is much more a Flash topic than one for the AE community, so better ask your questions there.
Mylenium

Locking Vignette to Motion Track in FCP, Can it be done?

Hello All,
I have been watching a tutorial about Apple's Color and there was one section that
used a motion track and connected a vignette to that track. I thought it was neat and
convenient, so the question is, can that be done in Final Cut or the second choice would
be Motion?
The process was elegant in Color but that puts the effect late in post, at out put stage. I know
something similar can be accomplished with key frames. The idea that a motion track can
control an effect is intriguing.
Thank you, Tom

FCP does not have motion tracking. You can send the clip to Motion and Motion track the effect there.

AVCHD Sony footage has lines in chroma key in FCP

My footage shot on with Sony Nex-fs700 will not chroma key with placing blue vertical lines in the final key. The line appear only after I render. My sequence settings match my footage. Can anybody help.
Stinson

I shot in 1080 24p FX and I set the sequence to 24 fps and I was getting the vertical lines, flicker and lag in the image with any quick moments. So I created a new sequence and placed a test clip on the timeline and FCP asked if I wanted match my clip to the sequnce and I said no. I applied the color smoothing 4:2:2 and chroma key filters and played the clip and it was fine but still with the vertical lines. I then removed the color smothing 4:2:2 filter and no vertical lines. Still might send you a short clip just for kicks.
Yes I have After Effects and Motion and I will give them a try when I finish this project.

Motion tracking in PE12

How can I only get text to show during motion tracking? - I don't want the animation which is included!
Best regards...

SG
On what Premiere Elements version?
I am talking specifically about your second option for this Premiere Elements 12 Motion Tracking question....
The other option is to create the title BEFORE you do your set up your Motion Tracking, and then just drag it from the Project Assets panel onto your Track Object.
I see no opportunity to get to Project Assets to get at the title/text without shutting down the Motion Tracking workspace. But, if you insist it can be done, we will give it another look with Premiere Elements 12 on Windows 7 64 bit.
One alternative that does work (that you did not mention) was
a. create a text title
b. save the text as a .prtl file
c. place the saved .prtl file in the path
Local Disc C
Program Files
Adobe
Adobe Premiere Elements 12
Clip Arts
Common
and in the Common Folder place a folder named something like My Text, with My Text Folder containing the .prtl file.
That My Text category and the text file in it will show up in Graphics from which you can drag the text to the screen at the appropriate prompt in Motion Tracking scheme. In this approach, the text becomes a permanent and reusable resource under the Graphics Tab.
ATR

Continue motion tracking

I did motion tracking and have a target layer attached to the motion tracking and it the target is masked. It is working great. I corrected some of the keyframes in the motion tracking and really fine tuned it.
Now, I would like to continue the same motion tracking with the same target for the rest of the clip. Can I continue the tracking? I notice that if put the playhead where I want it to continue and I go to the tracker panel and click on track motion, the tracking that I've already done comes undone and is no longer working.
Is there an easy way to continue the tracking where it left off? If that is not possible, is it possible to use the same target and do more motion tracking with another motion tracker?

I think you're hitting the wrong switch. When you open up the tracking (you have to do it in the layer view, of course), you should be able to use the Analyze Forward button for the tracker.
Here's a boatload of helpful information on Motion Tracking.

How do I motion track just like the Plugin CameraTracker 1.0?

On the plugin CameraTracker, it automatically detects points that can be motion tracked, and it does it very well. What got me thinking, is that it also carries on tracking when a tracking point goes out of screen.
Here's an example:
I am using CameraTracker. As you see, this is the beginning of the clip, and what happens in this scene, is that the camera just fly towards the jungle.
If you see "Hehe", there's a green cross, and that is where the "Hehe" is tracked to. That red box is the null object.
Okay, so when the camera is flying towards the jungle, it passes that green point. And as it passes, it does not stuff the "Hehe". That "Hehe" stays in place as if it was in this Minecraft world.
It says in place, even though the cross has gone out of place.
BUT, if I use the Adobe After Effects built in motion tracking, and just want to select that point where the "Hehe" is, and I begin tracking, it goes pass then green cross, then that tracking box goes everywhere.
How do I do this so it's like CameraTracker? I want to do this using the default After Effects Motion Tracker.
If you cannot understand what I'm trying to explain, let me know what part you don't understand.
thanks.

Could you give me an example of "where you stop the track then move the track point to another spot in the image", using my picture?
What's the difference between CS6 Camera Tracker, and CS6 Motion Tracker?
And for the Camera Tracker plugin, I can only seem to track ONE part. If you see the image, the words are like in one part of the scene. If i were to put a word in a tree, it would look stuffed up. The word wouldn't be tracked onto the tree. It would be tracked on the sand instead.

Tracking and Masking Text

How do i do this:
http://www.youtube.com/watch?v=1sJFGDpUdgA
Is there a tutorial out there ??
Hope for help
Jacob

So as to hide something behind your talent in a shot you need to do Rotoscoping.
See this tutorial from Todd_Kopriva about how to do Motion Tracking and Rotoscoping within AE.
See this tutorial from Mathias Möhl about using his Tracker2Mask script to simplify and speed up your rotoscoping.
See this tutorial about rotoscoping with Mocha.
You may either duplicate your footage and use rotoscoping data to cover some part of the object (text) in between
or create a shape matte (e.g. export Shape Date instead of Tracking Data out of Mocha and apply them onto a Solid) and use its inverted alpha channel to hide some part of the object (text)
See more help about Rotoscoping and Masking

Motion tracking and chroma key

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