Set sample-based audio In and Out points

In and Out points are set at time-base divisions—that is, between video frames. Although frame-based edits are adequate for audio as well, some audio edits require greater precision. For example, you may want to place an In point between two words in a sentence, but the tiny division between words doesn’t conveniently fall between frames. Digital audio, however, isn’t divided into frames, but into audio samples, which occur far more frequently. By switching the Source Monitor’s or sequence’s time ruler to audio samples, you can set more precise audio In and Out points.

Switch a time ruler to audio units in the Source or Program Monitor

  • In the Source or Program Monitor panel menu, choose Show Audio Time Units.
  1. Switch the time ruler in the Source Monitor or Timeline panel to audio units.
  2. To navigate, do one of the following:
    • Drag the current-time indicator in the time ruler to navigate smoothly through the clip.
    • Click the Step Forward or Step Back buttons to move the current-time indicator one audio sample at a time.
  3. Drag either end of the zoom scroll bar below the time ruler in the Source Monitor or Timeline panel.

Trim audio in sample view in a Timeline panel

  1. In a Timeline panel menu, choose Show Audio Time Units. The time rulers in a Timeline panel and Program Monitor switch to a sample-based scale.
  2. If necessary, expand the audio track containing the clip you want to edit, click the Set Display Style button , and choose Show Waveform.
  3. View the audio In point or Out point of the clip you want to edit in detail by dragging the zoom slider to the right.
  4. Trim the clip by doing one of the following:
    • To adjust the In point, position the pointer over the left edge of the clip’s audio so that the trim head tool appears, and drag left or right.
    • To adjust the Out point, position the pointer over the right edge of the clip’s audio so that the trim tail icon appears, and drag left or right.
  5. Use the waveform display or play the audio to make sure that you adjusted the In and Out points properly.

In the Project panel, clips that contain both video and audio appear as a single item, represented by . When you add the clip to the sequence, however, the video and audio appear as two objects, each in its appropriate track (provided you specified both the video and audio sources when adding the clip).

The video and audio portions of the clip are linked so that when you drag the video portion in a Timeline panel, the linked audio moves with it, and vice versa. For this reason, the audio/video pair is called a linked clip. In a Timeline panel, each part of the linked clip is labeled with the same clip name, which is underlined. The video is marked [V] and the audio is marked [A].

Ordinarily, all editing functions act on both parts of a linked clip. When you want to work with the audio and video individually, you can unlink them. When you do, you can use the video and audio as though they were not linked; even the clip names no longer appear underlined or bear the [V] and [A] labels. Even so, Premiere Pro keeps track of the link. If you relink the clips, they indicate whether they have been moved out of sync, and by how much. You can have Premiere Pro automatically resynchronize the clips.

You can also create a link between previously unlinked clips. This is particularly useful if you need to synchronize video and audio that were recorded separately.

Note:

You can link video only to audio—you cannot link a video clip to another video clip. You can link a video clip to multiple audio clips, or multiple audio clips together.

  1. Do the following in a Timeline:
    • To link video and audio, Shift-click a video and audio clip, or a series of audio clips to select them, and then choose Clip > Link.
    • To unlink video and audio, select a linked clip and choose Clip > Unlink.
    • To unlink video and audio from multiple clips, select the clips and choose Clip > Unlink.

    Note:

    After unlinking a clip, video remains selected while audio becomes deselected.

  2. (Optional) To use a set of linked clips multiple times, create a nested sequence from the set of synchronized clips, and place the nested sequence in other sequences as desired. For more information, see Create a nested sequence from a selection of clips.

Edit tracks of linked clips individually

  • In a Timeline, Alt-click/Option-click either part of a linked clip, and then use any editing tool. When you have finished editing the clip, you can reselect (click) the clip to edit it as a linked clip again. Alt/Option-dragging audio or video works well for adjusting a split edit.

Automatically synchronize clips that were moved out of sync

  1. Right-click/Control-click the number that appears at the In point in a Timeline panel of the out-of-sync video or audio clip. (The number indicates the amount of time the clip is out of sync with its accompanying video or audio clip.)
  2. Choose one of the following options:

    Move Into Sync

    Shifts the selected video or audio part of the clip in time to restore sync. Move Into Sync moves the clip without regard to adjacent clips and overwrites any clips to regain sync.

    Slip Into Sync

    Performs a slip edit to restore sync without moving the clip’s position in time.

    Note:

    For information about synchronizing multiple clips with each other for a multi-camera edit, see Synchronize clips with markers.

Create split edits

Ordinarily, you set one In point and one Out point for a source clip. Even if it’s a linked clip (a clip containing video and audio tracks), In and Out points apply to both tracks of the clip. Set in a sequence, the audio and video of the standard clip appear at the same time. Sometimes you want to set the video and audio In or Out points independently, however, in order to create split edits (also known as L-cuts and J-cuts). When placed in a sequence, a clip trimmed for a split edit will have its audio appear before its video, or its video before its audio.

Clip trimmed for J-cut (left), L-cut (right)
A. Clip trimmed for J-cut B. Clip trimmed for L-cut 

Create a split edit

  1. If necessary, click the triangle to the left of each track name in a Timeline panel to expand the audio tracks you want to adjust.
  2. Select one of the clips involved in the split edit, and choose Clip > Unlink. Repeat for the other clip.

  3. Select the Rolling Edit tool from the Tools panel.
  4. Starting at the audio edit point between the two clips, drag left or right.

    Note:

    If nothing happens, make sure that before you start dragging, you position the pointer over the visible audio edit point, not over an applied audio transition.

    A common editing technique is to Alt/Option-drag a clip’s audio or video to quickly adjust a split edit. It’s a lot faster than going to a menu to unlink a clip.

Set source In and Out points for a split edit

Although it’s common to create split edits after clips are assembled into a rough cut, it’s possible to trim clips for split edits in the Source Monitor before adding them to the sequence.

  1. Open a clip in the Source Monitor, and move the playhead to the frame you want to set as a video or audio In or Out point.

  2. In the Source Monitor, choose Marker > Mark Split, and select Video In, Video Out, Audio In, or Audio Out.

  3. Set the remaining video and audio In and Out points. (When you add the clip to a sequence, the video portion starts and ends at different times than the audio.)

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