Autodesk 62205-051408-9001 User Guide - Page 285

The Timewarp Controls ❚❘❘ Interpolated frames are always created from two or more source frames. Select Skip Repeat Blend Trail Adaptive To Use the closest frame and do not interpolate. In other words, if the source frame (the Y coordinate) is 48.3, use frame 48 as the output frame; if the source frame is 36.8, use frame 36. This is the fastest option, as it does not produce any new frames and thus does not need to add any new frames to the cache. Perform a weighted addition of the two closest frames. Thus if the two closes frames are 62.3 and 65.7, create an interpolated frame from frames 62 and 65, using a weighted addition. Blend multiple frames before and/or after the current frame, with the current frame. Use the Pre Trail and/or Post Trail boxes to specify the type of trail (the location of the frames relative to the current frame), the number of frames you want to use to create that trail, and the fall-off (weight) you want to assign to the trail. Both trail types blend frames with the current frame. A pre trail blends frames that precede the current frame, and a post trail blends frames that follow the current frame. For example, if you want to blend the six frames that follow the current frame, with the current frame, set the Post Trail Sample box to 6. Use the Weight box to specify the weight to assign to the individual frames being blended. A value of 100 means to use each frame at 100%. A value of 0 means to use the current frame at 100% and diminish to 0% as you move away from the current frame. Use Trail mode but automatically compute the trail length based on speed. Reset Button The reset button is useful when you want to start the timewarp over from scratch. Reset All-Resets the timewarp to its default settings (the settings it has when you first create the Timewarp operator). The initial setting is a constant timewarp with the same duration as the source footage. Working in the Curve Editor In the Curve Editor, you can modify the shape of the timing curve by adding keyframes and then using the mouse or pen to adjust the position of those keyframes. Each keyframe has tangent handles you can use to refine the timing and speed curves at that keyframe. You can move or delete any keyframes you create. You can also zoom and pan to change the contents the Curve Editor displays. To add a keyframe: Do either of the following: • Click the timing curve at the point at which you want to add a keyframe. • Drag the current frame bar to the frame at which you want to add a keyframe and press SHIFT+A. To reposition a keyframe: Do either of the following • To reposition the keyframe vertically, click and drag it. • To reposition the keyframe horizontally, right-click and drag it. To delete a keyframe: Click the keyframe and press either DELETE or BACKSPACE. To refine the curves using a keyframe tangent: Click and drag the tangent handle. To break a tangent, or reconnect a broken tangent, press CTRL and click the tangent handle. 269