Frame refers to a single image, and a frame is equivalent to a grid on the film.
In order to express movement or change, any animation should give at least two different key states, called keyframes. The change and connection of the intermediate state is automatically created by the computer through a specific interpolation method, which is called "transition frame" or "intermediate frame". This way of creating animation is called "keyframe animation" or "tween animation".
Operation key frame
By creating keyframes through the effect control panel and setting attribute parameters for different keyframes, transition animation can be generated between keyframes.
Generally, the longer the interval between two key frames, the longer the transition time. On the contrary, the faster the change.
Please refer to the figure below for the method of adding or deleting keyframes.
You can box or click the set keyframe. Hold down the Shift key to make multiple selections, or click the attribute name to select all keyframes of the attribute.
Right-click a keyframe marker and select Copy (Ctrl/Cmd+C), Paste (Ctrl/Cmd+V), Clear (Delete), Select All (Ctrl/Cmd+A) or select an interpolation algorithm, or directly move one or more keyframe markers.
Fixed effect control
There are three kinds of effect controls in the effect control panel: motion, opacity and time remapping, which are the basic effects of all objects, so they are called "fixed effects" or "inherent effects".
Audio editing also has three fixed effects: volume, channel volume and audio-visual device.
Tip: If you don't set the key frame but only adjust the parameters, it is the overall adjustment of the clip.
Motion control
It is divided into position, scale, rotation, anchor point and anti-flicker filter.
Tip: This effect can be replaced by "video effect/transformation" for most functions. When an object is moving, it usually has natural characteristics such as slow exit and slow entry, as well as visual feelings such as dynamic blur. The "deformation" effect control can easily realize the dynamic fuzzy effect.
You can directly adjust properties such as position, scale, rotation and anchor point in the program panel. To do this, click Motion or the attribute name column under it (with deformation icon). Or, use the selection tool to double-click the program panel, and make adjustments after a border line appears in the picture.
Tip: This operation is supported by video effects such as corner positioning, cropping, mirroring, transformation and rotation distortion.
1, location
The position attribute can realize the movement of the clip in the program panel.
These two values represent the x and y values of the fragment anchor point in the sequence coordinate system, respectively.
Sequential coordinate system
Tip: The sequence coordinate system takes the upper left corner of the program panel as the origin. Please look at the picture above.
Therefore, if the values of x and y are both 0, it means that the anchor point is located at the origin of the upper left corner of the program panel screen. If the x value is 0 and the y value remains the same, only half of the screen is displayed.
Step 2 Scale in proportion
Zooming effect is often used in video transitions and local close-ups and other effects.
The value is 100, indicating the original size, i.e. 100%.
-Uniform Zoom: selected by default. If unchecked, you can stretch horizontally (width) and vertically (height) respectively, but this will easily lead to screen deformation.
Supplement: How to change the size of the editing screen
(1) Use the zoom attribute under motion control or vector motion control.
(2) Right-click the clip in the Timeline panel and select Zoom to Frame Size. Unlike Set to Frame Size, the former usually resamples the image at a lower resolution.
"Set to Frame Size" essentially changes the scaling attribute in motion control so that the clip size is consistent with the sequence size.
You can set the default zoom in Preferences/Media/Default Media Zoom.
3. Rotate, rotate
The rotation effect can increase the sense of motion, which is suitable for the rotation of video or subtitles.
Hold down the Shift key to rotate in units of 10, and hold down the Ctrl/Cmd key to rotate in units of 0. 1.
Tip: Position, scale and rotation are all spatial attributes. By default, keyframes transition linearly. To make the transition smoother or more vivid, you need to right-click the keyframe and choose a different interpolation method.
4. anchor point
The anchor point is the control origin of position, scale and rotation.
Move anchor point: press and hold Ctrl/Cmd key to move anchor point for automatic alignment.
The coordinates of the anchor point are based on the original clip coordinate system. Even if the clip is moved or scaled, it always takes the upper left corner of the original clip as the origin, keeping the length and width of the original clip relatively unchanged.
For example, the sequence picture is 1920 x 1080, and the original clip is also 1920 x 1080. Now the clip is reduced by half and placed in the lower left corner, and the anchor point is moved to the upper right corner of the sequence picture, so the anchor point coordinates at this time are: (3840,-1080).
Original editing coordinate system
Tip:
Moving the anchor directly will change the x and y values of both the position attribute and the anchor attribute.
However, if you only change the coordinate values of the anchor attribute, the clip will move on the program panel, which can ensure that the coordinate values of the position attributes remain unchanged because they are based on different coordinate systems.
5. Anti-flicker filter
When converting interlaced video or reducing high-resolution material, the flicker problem of picture details (such as thin lines, sharp edges, parallel lines that produce moire fringes, etc.). ) can be alleviated.
It should be noted that with the increase of its intensity, more flicker will be eliminated, but the image will also fade.
Opacity control
Includes two options: opacity and blending mode, and three mask drawing tools.
Tip: For mask drawing tools, please refer to.
1, opacity
Opacity is the degree to which the clip is displayed. The smaller the value, the more transparent the clip is.
Tip: This effect can be replaced by keying /Alpha adjustment.
By setting opacity keyframes, you can achieve animation effects, such as the display or disappearance of clips in the sequence, fading in and out. Usually used to create transition effects such as fade-in and fade-out.
2. Mixed mode
Set the blending mode of clips and clips in the following tracks, similar to the layer blending mode in ps.
The mixed mode is divided into six groups: normal mode group, darkening mode group, brightening mode group, contrast mode group, contrast mode group and color mode group.
Tip: Multiplication mode corresponds to positive superposition in Ps.
Time remapping control
The so-called time remapping is to map the recording rate to the playback rate, such as accelerating, decelerating, playing backwards, and even freezing.
Compared with the use of "proportional stretching tool" and "speed/duration", its biggest advantage is that it can set the gradient and the control is simpler and more intuitive.
Please refer to.
Attribute change control
The way to describe the transformation of attributes from a key frame to b key frame is usually called "interpolation method". By default, attribute changes are linear and uniform.
Pr provides two methods to control the change: key frame interpolation and velocity curve.
The speed curve is adjusted in the mini timeline on the right side of the effect control panel.
Keyframe interpolation is usually selected from the right-click menu of keyframes. Keyframe interpolation can be divided into temporary interpolation (temporal interpolation) and spatial interpolation.
Please refer to.
Use keyframes on the timeline panel
When using keyframes to create an animation, you can view and edit keyframes in the Effects control panel or the Timeline panel. Sometimes, it is more intuitive and convenient to use the timeline panel to set keyframes.
1. Editing keyframes in the Timeline panel is suitable for properties with only one-dimensional numerical parameters, such as opacity and volume. The effects control panel is more suitable for setting two-dimensional or multi-dimensional values, such as position, scale or rotation.
2. In the timeline panel, the transformation of key frame values will be displayed in the form of charts, so the trend of attribute values changing with time can be intuitively analyzed.
Tip: Press the left mouse button first, and then press Ctrl/Cmd for fine adjustment.
3. The effect control panel can display key frames of multiple attributes at the same time; Timeline panel can display multiple tracks and keyframes of multiple clips at the same time, but usually only one attribute can be displayed for each track.
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