Apple Compressor 3 Bedienungsanleitung PDF herunterladen (Seite 286)

Note: If you want to transcode a normal size standard definition (SD) source media file

(720 x 486) using an MPEG-2 NTSC setting, your output media file will be automatically

cropped (two pixels from the top and four from the bottom) to achieve the MPEG-2

required dimensions of 720 x 480, unless you already specified cropping attributes. This

crop attribute is only temporary and is not saved in the setting. You can see the

automatic crop in the usual way, by double-clicking the setting in the job to open the

Preview window. See About the MPEG-2 Encoder Pane for more information about the

Video Format pop-up menu.

• Custom: Choose this option to manually enter values in the Left, Right, Top, and

Bottom cropping fields, or to adjust these values by dragging the red frame bars in

the Preview window. For more information, see Making Geometry Adjustments to a

Setting.

• 4:3 (1.33:1): Applies an automatic center crop with an aspect ratio of 4:3.

• 16:9 (1.78:1): Applies an automatic center crop with an aspect ratio of 16:9.

• Panavision (2.35:1): Applies an automatic center crop with an aspect ratio of 2.35:1.

• Europe Standard (1.66:1): Applies an automatic center crop with an aspect ratio of

1.66:1.

• UK Standard (1.75:1): Applies an automatic center crop with an aspect ratio of 1.75:1.

• Academy (1.85:1): Applies an automatic center crop with an aspect ratio of 1.85:1.

• Letterbox area of source: This option allows Compressor to detect whether the source

media file has been letterboxed, and if it has, to enter crop values to remove the

letterbox.

• Left, Right, Top, and Bottom: The four cropping fields (Left, Top, Right, and Bottom)

allow you to crop the frame of your source media file in pixel increments. Most broadcast

video files have overscan areas. If the output file will be shown exclusively on a computer

screen rather than on a television screen, you can safely remove some edging from

your file without affecting the picture area. The numbers give the distance (in pixels)

between the edge of the original frame and the resulting cropped frame. All fields

default to 0.

Note: The regular (action safe) overscan area is the outer 5 percent of the image on all

four sides. Cut in an additional 5 percent and you have the more conservative title safe

area. So you can safely crop anywhere between 5 and 10 percent of your outer frame

area and still preserve the essential material.

286 Chapter 24 Adding Geometry Settings

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Apple Compressor 3 Bedienungsanleitung Seite 286