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Using keyframes in Final Cut

Using keyframes in Final Cut. Using keyframes in Final Cut. Final Cut enables us to alter many aspects of a movie frame, including opacity scale (magnification) position rotation distortion

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Using keyframes in Final Cut

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  1. Using keyframes in Final Cut

  2. Using keyframes in Final Cut • Final Cut enables us to alter many aspects of a movie frame, including • opacity • scale (magnification) • position • rotation • distortion • By treating certain frames as keyframes, we can tween between the value of some property (say opacity) in one frame and the value of the same property in another frame • Thus, we can make the values of these properties change gradually as the movie is played

  3. Changing the opacity of frames in a clip • A 10-second clip in the timeline panel

  4. Changing the opacity of frames in a clip • Toggle the Clip Overlays (alt-W)setting to on

  5. Changing the opacity of frames in a clip • Notice there is now a thin black line along the top of the clip

  6. Changing the opacity of frames in a clip • Compare the top of the clip before and after toggling clip overlays • The new line denotes the opacity of the frames in the clip • The fact that it is at the top means that all the frames in the clip have 100% opacity

  7. Changing the opacity of frames in a clip • We can move the opacity line • First, choose the pen tool (keyboard: p)

  8. Changing the opacity of frames in a clip • Then click on the left end of the black line -- see that a small black mark appears

  9. Changing the opacity of frames in a clip • See the black mark where we clicked at the left end of the line

  10. Changing the opacity of frames in a clip • Dragging on this black mark we can pull the line down, reducing the opacity of all the frames in the clip

  11. Changing the opacity of frames in a clip • Below, we have dragged the line around halfway down, reducing the opacity of all the frames in the clip to 51%

  12. Changing the opacity of frames in a clip • Below, we have dragged the line to the bottom, reducing the opacity of all the frames in the clip to 0% • As a result, the image in the canvas panel is blank

  13. Changing the opacity of frames in a clip • The pen tool is still selected • Move the mouse inside the clip and you will see a small black vertical line moving along the time calibration of the timeline panel

  14. Changing the opacity of frames in a clip • Below, the small black vertical line is around 4 second on the time calibration of the timeline panel • Now, making sure you hold the mouse on the black line directly underneath this small vertical line, click the mouse and ...

  15. Changing the opacity of frames in a clip • ... and a second black mark appears on the opacity line • Now, you can increase the opacity of the frame at 4 seconds, by dragging this black mark upwards ...

  16. Changing the opacity of frames in a clip • ... as you drag this second black mark upwards, notice that the opacity line starts to slope between the two black marks • You are actually tweening the opacity of all the frames between 0 seconds and 4 seconds

  17. Changing the opacity of frames in a clip • Drag this second black mark upwards, until it reaches 100% opacity • Now, all the frames between 0 seconds and 4 seconds have opacities ranging between 0% and 100% • The frames where we placed the black marks are keyframes and we have tweened opacity between these two keyframes

  18. Changing the opacity of frames in a clip • The playhead is at 0.5 seconds below, which means that the frame at the playhead should have around 12% opacity • We can see the effect of this by looking at the canvas panel

  19. Changing the opacity of frames in a clip • The playhead is around 1 second below, which means that the frame at the playhead should have around 25% opacity • We can see the effect of this by looking at the canvas panel

  20. Changing the opacity of frames in a clip • Let's export this sequence as a movie, so that we can see the effect we have created

  21. Seeing the effect of what we have done • Although the sequence was exported as a .mov file, the movie has been recoded to a .flv file to make it more practical for use on the web • See it here http://www.cs.ucc.ie/j.bowen/cs2508/widgets/exampleOfFadingIn.flv • Later, we will use keyframes to tween other aspects, such as scale (magnification), position, rotatio, distortion • But, next, we will look at layers • Meanwhile, however, tackle Exercise 6: http://www.cs.ucc.ie/j.bowen/cs2508/exercises/exercise06/

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