Instrucciones para facilitar el uso y sincronización de material de audio y video separados en fcp 7. Se trata de dos formas de crear clips en la ventana de proyectos que contienen las pistas de video y audio externo sincronizadas, para no tener todo el material sobre la línea de tiempo de forma desordenada y caótica.

Tomado del Manual Online de Final Cut.

Using Synchronization Points to Create Merged Clips

Before actually merging clips, you need to find a synchronization point between them. There are different ways of doing this, depending on how you shot your footage:

If the timecode of your video and audio clips isn’t identical, and you slated all your shots at the beginning with a clapboard: You can use In points to line up all the clips you want to merge.
If the timecode of your video and audio clips isn’t identical, and you have one or more shots that you tail-slated at the end: You can use Out points to line up all the clips you want to merge.
If the timecode of the video and audio recorders used on the shoot was synchronized: You can use the timecode of both the video and audio clips to synchronize them.

If you have a complicated combination of syncing In and Out points, and your video and audio clips don’t have matching, synchronized timecode, you can add auxiliary timecode to each clip so that the clips’ sync points all fall on the same timecode number. You can then use the auxiliary timecode track (Aux TC 1 or 2) to merge your clips. This is just like using the main timecode track for syncing, but auxiliary timecode tracks are useful because you keep the original timecode track intact, which is critical for recapturing your media from the original source tapes. For more information about adding auxiliary timecode to a clip and its media file, see Modifying Timecode in Media Files.

To synchronize video and audio clips using In or Out points

Open the video clip you want to synchronize in the Viewer.
Scrub through the beginning or end of the clip and find the frame where the clapper on top of the slate first closes.
Set an In point if the “clap” appears at the beginning of your clip, or an Out point if at the end.
Note: If you decide to use an In point, you should use an In point for each clip you want to include in the merged clip. If you don’t set an In point yourself, the first frame (Media Start) of the clip is used instead. If you decide to synchronize by Out points, you should use an Out point for each clip to be merged. If you don’t set an Out point yourself, the last frame of the clip is used.
Open each audio clip you want to merge in the Viewer, and repeat steps 1 through 3, identifying instead the frame of audio where you first hear the clap.

Once all your clips are synchronized, you can merge them.

NOTA: Para hacer el "Merge", hay que seleccionar los puntos como explica el manual, y luego seleccionar los clips en la ventana de proyecto. Finalmente, se hace ctrl + click (o click derecho) sobre los archivos y se selecciona "Merge Clips". Así se crea un clip nuevo en la ventana de proyecto.

Creating Merged Clips from the Timeline

You can also create merged clips by dragging a group of linked clip items from the Timeline to the Browser. This can be useful if you want to synchronize a group of audio and video clips visually, changing their sync relationship and duration using the various editing tools available in the Timeline. Viewing each clip item’s timecode in the Canvas timecode overlays can also be helpful for synchronizing items.

To create a merged clip from two or more clips in the Timeline

In the Timeline, edit the clip items you want to merge into a sequence so that they overlap.
Use the Selection, Ripple Edit, and Slip tools to line them up in the sync relationship you want.
Using the Selection tool, select all the clip items you’ve lined up.
Choose Modify > Link (or press Command-L) to link the clip items together.
Drag the linked clip items from the Timeline to the Browser.