Previewing and Rendering Transitions

Many transitions can play back in real time, depending on your system and the transition you’re applying. Those that can’t need to be rendered. Rendering is the process of combining your video and audio with the applied effects, such as transitions or filters, one frame at a time. The result is a new file, called a render file, that can be played back in real time. The render bar, above the ruler in the Timeline, indicates the render status of all transitions you’ve edited into your sequence (as well as other items in your sequence).

Figure. Timeline window showing multiple transitions and  a render bar that indicates the render status of each transition.

The render bar has two regions, one for video and the other for audio. Because you may have audio transitions that need to be rendered associated with sections of video that don’t need rendering, audio and video are kept separate.

Determining the Render Status of Transitions

Colors in the render bar above items indicate whether the items need to be rendered. Items that don’t need to be rendered have dark gray bars above them. For more information about real-time effects, see Using RT Extreme. For more information on rendering, see Rendering and Video Processing Settings.

Previewing Transitions Before Rendering Them

If you have to render your transitions, it’s a good idea to preview complex transitions first. You can preview transitions while you’re modifying them or any time before rendering them.

To preview a transition
Do one of the following:
  • Move the playhead in the Canvas or Timeline to a frame just before your transition, then choose Mark > Play > Every Frame (or press Option-Backslash or Option-P).

    Final Cut Pro plays every frame of your transition, although not in real time.

  • Move the playhead in the Canvas, the Timeline, or the Transition Editor over a frame of the transition.

    That frame of your transition is rendered and displayed in the Canvas, on your external monitor, or both, depending on how your external video settings are configured.

    Note: Make sure the Caps Lock key is not engaged. The Caps Lock key disables rendering.

Rendering Transitions

If you need to render your transitions, you can render all the transitions and effects in your sequence or only selected transitions. Rendering transitions is just like rendering clips with filters applied. For detailed information on setting up and using render quality settings, see Rendering and Video Processing Settings.

To render a single transition in your sequence
  1. Select a transition in the Timeline.

  2. Choose Sequence > Render Selection > Both (or press Command-R).

To cancel rendering, click Cancel in the status dialog or press Esc.

To render only transitions and effects that can’t play in real time
  1. Open a sequence in the Timeline.

  2. Choose Sequence > Render All, and make sure Needs Render is the only option turned on in the submenu.

  3. Choose Sequence > Render All > Both.

To cancel rendering, click Cancel in the status dialog or press Esc.

To render all transitions and effects in your sequence
  1. Open a sequence in the Timeline.

  2. Choose Sequence > Render All > Both (or press Option-R).

To cancel rendering, click Cancel in the status dialog or press Esc.