Synchronizing Audio and Video with Merge Clips

Premium Pro is a function that provides a method to sync audio and video called merge clips. This function streamlines the process by which people can sync audio and video that have been recorded separately. One can select a video clip (MP4, MOV, etc.) and sync it with up to 16 channels of the audio clip by using the Merge Clip command. Clips that are created by the merged clip are often referred as component clips.


Generally, one can merge a clip by group selecting them in either the Timeline or the Project Panel. The Merge Clips command can be invoked through either the clip menu or a contextual menu. More than one clip should be selected in order to enable contextual command.

One or more audio clips can be merged into a single AV clip. The maximum number of audio tracks permissible in a merged clip is 16 that includes a combination of mono, stereo, or surround 5.1 clips. A single mono clip counts as one track, whereas a single stereo counts as two tracks, and a 5.1 clip counts as six tracks.

Merging the clips in the Project Panel:

Follow this procedure to merge video and audio clips in the Project Panel:

  1. Choose the video clip that you want to merge with an audio clip. Note that you can have only one video clip in any merged clip.
  2. Use Shift or Control-click to choose the audio-only clips that you wish to merge with the video clip.
  3. Perform either of the following tasks:
  • Select Clip > Merge Clips.
  • Right-click and then choose Merge Clips from the shortcut menu.

Merge Clip dialog box will launch now. Select from one of the following options for the point of synchronization.

  • Based on the In point: For locating sync based on the In point, at the clap of the slate, for instance.
  • Based on the Out point: To locate sync based on the Out point, at the clap of the tail slate, for instance.
  • Based on matching timecode: To locate sync based on the common timecode between the two clips.
  • Based on clip makers: To locate a sync point based on a numbered clip marker in the middle of the shot. This function will be disabled as long as all the component clips have at least one numbered marker.

Now, click OK. Your merged clip will now be displayed in the Project Panel, with a name that matches the video clip, or the top most chosen audio clip if there is no video “-Merged” is appended to the end of the new merged clip’s name. You can rename this name if necessary.

Merging the clips in the Terminal:

Follow these steps to merge clips in the Terminal panel:

  1. Choose the clips and then perform one of the following:
  • Drag and drop the component clips into the Project panel.
  • Select Clip > Merge Clips.

Now, the Merge Clips dialog box will be launched.

  1. Now, click OK. The merged clip will now appear in the Project Panel.

Synchronizing clips in the Timeline panel:

Synchronizing the clips aligns multiple clips in the Timeline panel. After synchronizing the clips, you can create a merged clip. For synchronizing the clips in the Timeline panel, first edit the clips into the Timeline panel, and then perform one of the following:

  1. Manually align the clips by dragging them into a place until they are synchronized.
  2. Now, make use of synchronization function to align the clips. To do so, do the following:
  • Choose the clips that you want to synchronize.
  • Then, choose Clip > Synchronize.

Now, the synchronize dialog box will be launched. Then, select from one of the following options for the point of synchronization.

  • Based on the start of the clip.
  • Based on the end of the clip.
  • Based on matching timecode.
  • Based on the clip markers.

Now, click OK to complete the process of synchronization. Now, you are done with synchronizing the clips.

As said earlier, you can choose MP4, AVI, or other video formats for synchronizing with the audio clip. You can even edit the merged audio and video clips and trim the file. However, there are chances that you may face out of sync error after you edit the merged video file. As a result, audio codec may go lagging behind the video or vice versa. In situations like this, how to overcome the issue? As the efforts and time spent in synchronizing the clips will go in vain. Don’t be panic, as you can fix audio sync MP4 or other video file with the help of Repair QuickTime software. This advanced repair software is built with completely automated repair process that can fix any kind of issues associated with MP4, and MOV video files. The trail version of this software is available for free download, just download and install it, and start fixing audio video sync issues in MP4 file.