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Avid Advanced Keyframes Parameter Options

Having the abilty to control your keyframes is very important. The only true way to decide which setting is best for you is to experiment with the different options and see which one works best for you. Once you use the different options and see the results then you will become more familiar with the one the works best for you effect.

You can select from the following options for controlling parameter changes at keyframes:

1. Shelf : The parameter value does not change between keyframes and then changes abruptly to the new value. Some applications call this Hold.
Use Shelf to hold a parameter value for a fixed length of time. For example, you can use Shelf with the Position parameters to create a PIP that appears to "pop" to a new location at each keyframe.

2. Linear: The parameter value ramps smoothly between keyframes but then changes abruptly at each keyframe. The change in parameter value at a keyframe happens with no ease-in or ease-out.
Effects with standard keyframes make linear parameter changes (with the exception of Spline for motion paths and Acceleration for other parameters). With advanced keyframes, you can use the Linear interpolation option for some parameters and not for others, depending on the effect you want to achieve.

3: Spline: The parameter value changes smoothly at each keyframe, creating a simple ease-in or ease out effect. Spline is sometimes called Natural Spline or Cardinal Spline because the line representing the parameter value always goes precisely through each keyframe.
With two keyframes, the parameter value changes slowly at the beginning of the effect, speeds up the rate of change, and then slows down to come to rest gently at the end of the effect. Use three keyframes to create an arc.
Use the Spline interpolation option or the Bézier interpolation option for any parameter for which you want to avoid abrupt changes, such as Scaling or Border width.

4. Bézier : The Bézier interpolation option is similar to the Spline interpolation option, in that the parameter value changes smoothly at each keyframe. In addition, the Bézier interpolation option provides direction handles at each keyframe. You adjust the rate at which the parameter value changes by manipulating the direction handles.

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When you click a direction handle and drag it, you change the height and angle of the curve. The curve responds as if you were gently tugging it like a piece of string. The curve remains anchored to the keyframes on either side of the active keyframe.
Use the Bézier interpolation option (or the Spline interpolation option) for any parameter for which you want to avoid abrupt changes.

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Use Sawmill to process Streaming Server Log Files was the previous entry in this blog.

Avid and custom transitions is the next entry in this blog.

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