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Before you start working with the camera or the 3D come on a track in fact there is a concept that you

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need to understand the 3-D camera tracker effect is used to track the movement of the camera that has

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been used to shoot the video.

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I will show you a few examples where to use the 3-D cabinet tracker era where not to use a stick and

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old video that we have already work on the boat over here.

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If you skip through you will notice that the camera here is actually very stable maybe is set on a tripod

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and you have certain moving elements within the video.

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In this case the camera has no motion and using the 3-D camera tracker will be used.

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Let's take another example the other if you will DoubleClick in the other view.

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You will notice that the camera is moving so the camera has a certain movement.

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Of course you guessed that this is a drone flying over a certain area.

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So the camera has a lot of movement.

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The 3-D camera attack that would study the movement of the camera in this video it's very useful to

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use the 3-D come in a tracker because you would be tracking the movement of the camera stick.

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Another example also the Virgin this kind of video is very common.

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If you skip through you would notice first the elements inside the video itself are moving in not the

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airplane is moving is going further turning.

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But also the guy holding the camera is moving the camera.

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So now he's almost panning or rotating the camera and trying to follow with the airplane as if this

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movement somehow in this video camera has a certain movement that you can track.

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And also the element or the object over here the airplane can be tracked using track motion.

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So depending on what you want to do you can track the motion of the airplane or you can track the motion

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of the camera if you have a look at the old house over here in the old house here.

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The house is not moving.

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Of course it's only the camera that is moving.

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It's actually zooming in.

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If you had continued with this video you would see that the camera will go outside and start taking

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whatever is behind the house.

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But they stopped it over here.

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Actually yes you can use the truck motion for a portion of the house.

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For example this window here you could track the motion here.

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But also it would be much better to track the zoom of the camera.

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OK.

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That would make a lot of sense.

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So in concept if in a video the camera is moving on and the camera has such a movement.

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You will use the camera or the 3-D camera truck if the camera has no movement at all.

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Like in this world it's better to use the track motion in the next lecture.

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We start looking at the work flow of the through the camera structure effect.

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So you then.