Adobe Premiere Pro CS4 Bedienungsanleitung PDF herunterladen (Seite 294)

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USING ADOBE PREMIERE PRO CS4

Effects and transitions

Last updated 11/6/2011

The terms progressive and noninterlaced are thus closely related and are often used interchangeably, but progressive

scanning refers to the recording or drawing of the scan lines by a camera or monitor, whereas noninterlaced refers to

the fact that the video data itself isn’t separated into fields.

Chris Pirazzi provides technical details of fields and interlacing on his Lurker's Guide to Video website.

Trish and Chris Meyer provide a variety of materials about interlacing, field order, field dominance, field rendering,

and separating fields:

• article (PDF) introducing interlacing and field separation on the Artbeats website

• article introducing interlacing and field order on the ProVideo Coalition website

• article clarifying meanings of the terms field order and field dominance on the ProVideo Coalition website

• video overview of fields and interlacing on the Lynda.com website

About field dominance and field reversal

Fields in a clip can become reversed from the state in which they were originally acquired in any of the following ways:

• The video capture card used to capture the footage is set to the field dominance opposite that of the source device,

• The editing or animation software that last rendered the clip had the field dominance set opposite that of the

original clip,

• The clip is set to play backward.

Create interlaced or non-interlaced clips

Ordinarily, individual interlaced fields aren’t apparent to a viewer. However, playing a clip in slow-motion, creating a

freeze frame, or exporting a field as a still image can make a single field distinguishable. For these purposes, it is

sometimes preferable to deinterlace the image—that is, replace pairs of consecutive interlaced fields with single non-

interlaced frames. Premiere Pro can generate these new non-interlaced frames from the fields in one or two source

frames.

One unwanted interlacing artifact arises from a mismatch between the field order of a clip, and that of a sequence. Field

order specifies whether the field of odd-numbered lines (the upper field) or the field of even-numbered lines (the lower

field) is drawn first. For example, placing a clip with upper field order in a sequence using lower field order could result

in jerky playback. You can correct this problem by reversing the field order of the clip so that it matches that of the

project. You use the Reverse Field Dominance option to reverse the field order.

1 Select a clip in a Timeline panel, and choose Clip > Video Options > Field Options.

2 Select Reverse Field Dominance to change the order in which the clip fields play back.

3 For Processing Options, select one of the following choices:

None Doesn’t apply any of the Processing Options. Selecting this option does not disable Reverse Field Dominance,

if that option is checked.

Interlace Consecutive Frames Converts each pair of consecutive progressive-scan (non-interlaced) frames into the

two interlaced fields of a single frame. This also results in the clip running at twice its original frame rate. This option

is useful for interlacing clips created by animation applications not capable of generating interlaced frames. Ideally,

you could use it to convert 60-fps progressive-scan animations into 30-fps interlaced video.

Always Deinterlace Converts interlaced fields into non-interlaced, progressive-scan, frames. This option is useful for

clips you want to play in slow motion or in freeze frame. This option discards one field (retaining the dominant field

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Adobe Premiere Pro CS4 Bedienungsanleitung Seite 294