Apple QuickTime 7 Betriebsanweisung PDF herunterladen (Seite 16)

Avid Guide for AMA Workﬂow

QuickTime

Making a compatible QuickTime movie

Many QuickTime movies you edit may not come from an Avid editor, but from a graphic artist or an editor using

a different editing environment or device. These ﬁles may be After Effects animations or Maya 3D movies. You

can also exchange media with other editing systems such as Apple Final Cut Pro and Adobe Premiere.

Movies from all of these sources are viable for QuickTime AMA linking into your Avid software if they meet the

requirements mentioned earlier. Additionally, if these ﬁles are rendered in these applications as Avid codec

movies, they will link via QuickTime AMA and deliver the best possible performance in your editing environment.

We mentioned earlier that the Avid codecs are available for both the Mac and PC from the Avid website. Install

these codecs on your authoring stations for these other applications, and you can choose an Avid codec for

the render target.

Possible issues

All software applications have different render dialogs, so here are some general guidelines you will need to

interpret for rendering ﬁles in your particular third-party application. These are the three most common issues:

Ensure that the frame size of your movie is an Avid-approved frame size. Each codec has a legal frame size,

and if the movie’s dimensions are off by even a single pixel, you won’t be able to use it. For example, an old

Meridien-compressed codec requires a 720 x 486 raster, while many programs commonly composite for TV

at 720 x 480 pixels. For details about frame sizes for these codecs, see the Avid Media Composer Advanced

Guide.

Ensure that your video levels are set correctly. Speciﬁcally, be sure to encode any movie made using “graphics”

levels (where digital 0 is black and 255 is white) as RGB. Encode any movie using “TV” levels (where black is

16 and white is 235) as 601(SD) / 709 (HD). Generally, most graphics applications use RGB levels internally

(this includes Photoshop and After Effects), and RGB is often the correct render setting.

Ensure that the ﬁeld order is correct or motion artifacts will occur. Progressive or Interlaced:

NTSC: LFF, Lower Field, Even Field,

PAL: UFF, Upper Field, Odd Field

HDTV: UFF, Upper Field, Odd Field

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Apple QuickTime 7 Betriebsanweisung Seite 16