Adobe 65009626 User Guide - Page 82

Viewing area controls, Pre-encoding tasks, Automatic deinterlacing, Crop the source before encoding

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USING SOUNDBOOTH CS4 78 Saving audio and video files 1:1 Pixel Preview Displays the image using a square PAR. If the source file native PAR uses non-square pixels, the image appears distorted on a computer screen. Viewing area controls • To scale the video image, choose a scale setting from the View Zoom Level menu. Fit scales the image to fit into the available image area. The zoom level affects only the image in the dialog box; it does not affect the source file or exported file. You can zoom out by pressing Ctrl+ hyphen (Windows), or Command+ hyphen (Mac OS). You can zoom in by pressing Ctrl+ equals (Windows), or Command+ equals (Mac OS). Do not use the numeric keypad. • To cue the video numerically, drag the timecode display; or click the timecode display and enter a valid number. • To cue the video using timeline controls, click or drag in the timeline under the image to set playhead. Pre-encoding tasks In general, it's best to apply certain processing options-such as deinterlacing and cropping-to an exported file before encoding it to a particular format. Doing so can prevent visual artifacts associated with performing the same tasks after encoding. These tasks are pre-encoding tasks. The cropping options, deinterlacing options, and filters options you specify in the Export Settings dialog box are applied before encoding. Note: You can access the Gaussian Blur filter option (a pre-encoding task) by selecting the Filters tab. Automatic deinterlacing Adobe Media Encoder deinterlaces video before encoding whenever you choose to encode an interlaced source to a noninterlaced output. Crop the source before encoding 1 In the Export Settings dialog box, select the Source tab. 2 Select the Crop button and do any of the following: • To crop the image interactively, drag the sides or corner handles of the crop box around the source image. • To crop numerically, enter the values for Left, Top, Right, Bottom, in pixels. • To constrain the proportion of the cropped image, choose an option from the Crop Proportions menu. 3 Click the Output tab to preview the cropped image. 4 From the Crop Setting menu, choose one of the following: Scale To Fit To eliminate letterboxing and pillarboxing resulting from cropping, or from using video of different pixel size. Black Borders Applies a black border to the video even if the target dimension is smaller than the source video. Change Output Size To automatically set the frame height and frame width of the output to the height and width of the cropped frame. Choose this setting if you want to export content for use with Flash Player or other web applications without black borders such as those used with letterboxing or pillarboxing. Exporting video at the same dimensions or aspect ratio as the source video will prevent the black borders created when scaling or cropping. Note: The minimum size to which you can crop an image is 40 pixels by 40 pixels. Updated 15 July 2009

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78
USING SOUNDBOOTH CS4
Saving audio and video files
1:1 Pixel Preview
Displays the image using a square PAR. If the source file native PAR uses non-square pixels, the
image appears distorted on a computer screen.
Viewing area controls
•
To scale the video image, choose a scale setting from the View Zoom Level menu. Fit scales the image to fit into the
available image area. The zoom level affects only the image in the dialog box; it does not affect the source file or
exported file. You can zoom out by pressing Ctrl+ hyphen (Windows), or Command+ hyphen (Mac
OS). You can
zoom in by pressing Ctrl+ equals (Windows), or Command+ equals (Mac OS). Do not use the numeric keypad.
•
To cue the video numerically, drag the timecode display; or click the timecode display and enter a valid number.
•
To cue the video using timeline controls, click or drag in the timeline under the image to set playhead.
Pre-encoding tasks
In general, it’s best to apply certain processing options—such as deinterlacing and cropping—to an exported file before
encoding it to a particular format. Doing so can prevent visual artifacts associated with performing the same tasks after
encoding. These tasks are
pre-encoding tasks.
The cropping options, deinterlacing options, and filters options you
specify in the Export Settings dialog box are applied before encoding.
Note:
You can access the Gaussian Blur filter option (a pre-encoding task) by selecting the Filters tab.
Automatic deinterlacing
Adobe
Media
Encoder deinterlaces video before encoding whenever you choose to encode an interlaced source to a
noninterlaced output.
Crop the source before encoding
1
In the Export Settings dialog box, select the Source tab.
2
Select the Crop button and do any of the following:
•
To crop the image interactively, drag the sides or corner handles of the crop box around the source image.
•
To crop numerically, enter the values for Left, Top, Right, Bottom, in pixels.
•
To constrain the proportion of the cropped image, choose an option from the Crop Proportions menu.
3
Click the Output tab to preview the cropped image.
4
From the Crop Setting menu, choose one of the following:
Scale To Fit
To eliminate letterboxing and pillarboxing resulting from cropping, or from using video of different pixel size.
Black Borders
Applies a black border to the video even if the target dimension is smaller than the source video.
Change Output Size
To automatically set the frame height and frame width of the output to the height and width of
the cropped frame. Choose this setting if you want to export content for use with Flash Player or other web applications
without black borders such as those used with letterboxing or pillarboxing.
Exporting video at the same dimensions or aspect ratio as the source video will prevent the black borders created when
scaling or cropping.
Note:
The minimum size to which you can crop an image is 40 pixels by 40 pixels.
Updated 15 July 2009