In the previous exercise, you marked the Timeline to replace portions of clips already in the sequence. But you can also replace the full length of one clip with another. You do this with the Replace edit function in the Edit Overlay. In the following exercises, you will duplicate the original Jimbo Tracks sequence and replace all but two of the original Jimbo video clips. Replace edit replaces any clip in the sequence with a new source clip from the Viewer. The clip length and position in the sequence remain the same. So whatever new source clip you replace it with must be at least the same duration as the clip that is being replaced. If you don't select a clip that's long enough to replace the Timeline clip completely, a message appears saying "Insufficient content for edit." An important consideration in replacing edits is where the playhead is located in both the source clip in the Viewer and the original clip in the Timeline. In fact, the Replace edit function is dependent on the alignment between the two playhead positions. Replacing edits in the Timeline is a very fast, easy process but requires a little thought and preparation to get the desired effect. Replacing from the Head of a ClipFor the first Replace edit you perform, let's park both the Viewer and Timeline playheads on the first frame of the two clips that are involved in the Replace edit. Here, the Replace function will fill the duration forward from the playhead position.
Replacing from the Tail of a ClipYou can also use the Replace edit function to backtime a replacement clip into position. This is similar to the backtiming exercise, except you are replacing an entire clip. You will place the Timeline playhead on the last frame of a clip in the sequence. Then choose the corresponding frame on a source clip in the Viewer. Final Cut Express will line up the two clips and fill in, or backtime, the duration from that point.
Replacing from a Specific PointThe most fun you can have with Replace edit is replacing a specific action point with another one. Maybe it's a certain action move, where the baby spits up or where the touchdown pass was caught. You select a replacement source clip and position the playhead in the Viewer on the frame that you want to align with the frame in the Timeline. Once again, Final Cut Express will align the frame at the Viewer playhead with the frame at the Timeline playhead. The question to ask yourself as you begin this type of Replace edit is: What frame from the new source clip do I want to be placed at the playhead location in the Timeline? This time, rather than filling from first frame forward (the first exercise) or last frame backward (the second exercise), Final Cut Express will fill out the frames before and after the playhead to fill the existing duration. In this example, you will find a spot in Jimbo's sound track to match with a different video clip.
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