Adobe 25510629 User Guide - Page 64
Changing sources for a layer, Unassigning content from a layer
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NOTE Changing sources for a layer The methods outlined previously work regardless of whether a source is already assigned to the layer. When you change the source assignment, the new source inherits most of the adjustments to the layer that were made on any of the tabs. The only exceptions are the In and Out points for trimming a video clip. This lets you experiment with different combinations without having to redo any of the settings. For example, you can review multiple takes of a given shot quickly and easily. If the source that you substitute differs substantially in lighting or key color background from the source that you originally keyed, you must recalibrate the keyer. You can change to a white, black, or checkerboard source by using the right-click menu for the layer thumbnail. With virtual sets, the assignment of sources to inset layers is preserved, even if you switch to a set that doesn't have all of the insets. If you later change back to a set that includes those sources, you do not have to reassign them. However, the scale, position, and orientation settings for the input clip and inset sources are overridden by those that are predefined for each virtual set. If you are creating several composited clips for a single scene within a given Master Set that has insets or to which you're adding overlays, you can eliminate the need to assign the same set of sources to those layers each time by copying the sessions. Rather than creating each related session from scratch, make a copy of one that's already set up. You can then switch the virtual set and input clip, preserving the assignment of sources to inputs and overlays. You must still assign sources to any layers that didn't exist in the session that you copied. Unassigning content from a layer If for any reason you want to remove a source from a layer, which leaves the layer blank, rightclick the layer thumbnail, and choose Unload Source or Remove Current Overlay. This option isn't available for the virtual set because something must be assigned at all times. If you want to delete the current set, you must assign another set. To remove a virtual set and return to the default, select the Simple Keyed Clip virtual set found in the Basic folder of the Virtual Sets tab. Setting the aspect ratio of the input source When you assign a video clip as a source, Ultra tries to determine its native aspect ratio but is sometimes unable to do so. If a clip or still image appears stretched or squeezed, you can correct it by selecting the correct setting from the Aspect menu on the Input tab. 64 How to