Pre-trimming a clip and adding a transition
Typically, a transition overlaps portions of clips that are not essential to the video program, since these portions are likely to be obscured by the effect of the transition. So it often makes sense to pre-trim your clips, in order to make sure the transition occurs where you want it to. In the next few steps, you'll pre-trim clips, add them to the Timeline, and then insert the transition.
Double-click Eye.mov in Bin 1 of the Project window to view it in the Source view in the Monitor window. Or, simply drag the Eye.mov clip icon to the Source view in the Monitor window.
Double-click the timecode under the Source view (at the right), type 114, and press Enter (Windows) or Return (Mac OS) to locate a specific frame.
The timecode needs to be in 30 Frames per Second Non-Drop Frame (00:00:01:14) format. If necessary, click the Timeline window to make it active. From the title bar, choose Window > Window Options > Timeline Window Options. In the Timeline Window Options dialog box, select 30 fps Non-Drop Frame Timecode. Click OK.
Now, click the Mark Out button () under the Source view to set a new Out point for the Eye.mov clip. The Clip Duration shown under the Source view (at the left) now indicates that the clip has been trimmed to 1:16 to allow the transition to operate with the eye open instead of blinking.
Verify that the edit line is at the end of Earth.mov clip in the Timeline.
Now, do one of the following:
Make sure the Monitor window is active. From the title bar at the top of the Premiere screen, choose Clip > Insert at Edit Line.
Click the Insert button () at the bottom of the Source view to insert the trimmed Eye.mov clip into the Timeline after Earth.mov.
Drag the trimmed Eye.mov clip from the Source view to the Timeline at the edit line.
To add a transition between Earth.mov and Eye.mov, you will use the Transitions palette. But first, you'll change the duration of a transition.
Changing transition effect duration
You may remember that the default effect setting for effect duration was 30 frames, before you changed it to 15 frames earlier in the lesson. Before you add the transition from Earth.mov to Eye.mov, you need to reset the default effect setting for the effect duration.
Click Cross Dissolve in the Transitions palette.
In the upper right corner of the Transitions palette, click the menu button and choose Set Selection as Default.
Even if a transition is already the designated default (icon outlined in red), you choose Set Selection as Default to change the default effect settings for the default transition and all other transitions.
In the Default Effect dialog box, type 30 for the effect duration. While you are looking a the Default Effect dialog box, make sure that Effect Alignment is set to Center at Cut. Click OK.
Now the default effect duration has been restored to 30 frames.