[Cin] Manual Appendix: Keyframes and Plugins

[Andrea paz]

I have added a new section to the "Real-World" appendix. It is about a
workflow on "Keyframes and Plugins" and is written by DeJay as a post
in our forum. See if it is okay.

@Dejay
I've made minor changes, see if they work for you. If you have other
changes or additions let me know.

In addition to the .tex files I also attach the .txt file for everyone
to read and review.
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Workflow with keyframes and plugins


One of the most powerful functions of \CGG{} is the use of keyframes, which can be managed and applied for virtually anything you can do in the timeline, for example using them with plugins. See here(https://cinelerra-gg.org/download/CinelerraGG_Manual/Keyframes.html) for their in-depth description. Since they can be used in many ways, including very sophisticated ones, we present a workflow that can serve as an approach to the basic operation of keyframes applied to plugins(1).

Effects keyframing only works on the effect you are using, they are independently set for each effect you have added.

1- Put a multi-edits movie segment on the timeline, hit the "Ctrl-End" keys to get to the end and drag the effect(s) on to the whole timeline from the Resources window, then hit the "Ctrl-Home" keys to go to the beginning.
2- Enable keyframes autos button (Generate keyframes while tweeking) or hit "j", make an adjustment to the effect and a keyframe will be generated automatically.
3- Move the cursor until it becomes an arrow at the junction with the next clip and left click to put the playhead there.
4- Backspace one frame to the end of the first clip (hit "4" or "Alt-u" or click the left frame reverse transport button).
5- Adjust one parameter minutely and return it to its setting, one click on the mouse wheel rotation in each direction will do it, to set another keyframe which will hold the settings for the length of the clip. If you don't the settings will change as you adjust to set the next keyframe.
6- Go forward to the first frame of the next clip, reset the effect to set another keyframe, make any necessary adjustments.
7- Repeat as for the first clip and do that all the way down the segment. Do remember to disable keyframes afterwards or you might inadvertently change settings while fiddling!

Best bet by far is to Save As after each operation e.g. colour correction using (say) Histogram, Saturation and Unsharp, then there is a point to return to if the next operation goes belly up, or you want to make changes.

The final result is to have the first clip with a given plugin setting; the next edit with other settings; and so on throughout the timeline. The advantage is that you have only used the plugin once instead of adding a plugin to each edit.

It is preferable to put all the effects on the whole timeline and adjust them for each clip together, so you can see the overall result before moving on to the next clip. Effects are read from the top to the bottom of the stack and it is usually necessary to disable the effects lower down the stack while making adjustments. Using the example of Histogram, Saturation and Sharpen, disable Saturation and Sharpen while adjusting Histogram, or the Videoscope readings will be incorrect and so will the resulting settings, then enable Saturation and adjust that before moving to the next clip. Usually Sharpen is used as a track effect, meaning you don't keyframe it for each clip, keeping it disabled until the rest is complete.
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