Apple Compressor 3 Bedienungsanleitung PDF herunterladen (Seite 218)

4 Decide whether you want the GOP pattern to be open or closed and click the appropriate

button.

Working with MPEG-2 I-Frames

The Compressor Preview window offers additional MPEG-2 transcoding flexibility by

allowing you to manually insert I-frames into your output MPEG-2 file at any frame

location, regardless of your chosen GOP pattern and size. These are known as forced

I-frames, and may be useful for improving the quality of the MPEG-2 file in the vicinity

of the scene change. See Understanding GOPs and Frame Types for more information

on I-frames.

In addition, adding I-frames to your clip allows you to create chapter markers that

DVD Studio Pro can understand and use. See Adding Markers to a Clip and Adding

Chapter or Podcast Markers to a Clip for more information.

See Understanding GOPs and Frame Types, Things to Consider When Choosing a GOP

Setting, More About GOPs and Markers, and GOP Tab for more information about GOPs.

Stage 4: Choosing Extras Settings

You can control the inclusion or exclusion of specific MPEG-2 authoring information in

the Extras tab.

To open the Extras tab and choose Extras settings

1 Click the Extras button in the MPEG-2 Encoder pane to open the Extras tab.

2 Select the “Add DVD Studio Pro metadata” checkbox if you want Compressor to parse

specific MPEG-2 authoring information rather than parse the information later in

DVD Studio Pro.

Important: Selecting this checkbox may make your MPEG-2 files incompatible with any

DVD authoring tools other than DVD Studio Pro 2 (or later).

3 Select the “Include chapter markers only” checkbox if you want to exclude automatic

compression markers from the stream but still retain the chapter markers.

218 Chapter 18 Creating MPEG-2 Output Files

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Apple Compressor 3 Bedienungsanleitung Seite 218