Apple QuickTime Especificações descarregar pdf (Página 22)

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MAKING A COMPATIBLE QUICKTIME MOVIE

Most QuickTime movies we edit with may not come from Avid editing systems, but from

a Graphic Artist or another editing environment or device. These may be After Effects

animations, or Maya 3D movies. We also exchange media with other editing systems

such as Apple Final Cut Pro or Adobe Premiere.

Movies from all these sources are viable for QuickTime AMA linking into Avid if they

meet the requirements mentioned earlier. Additionally, if they are rendered in these

applications as Avid codec movies, they will link via QuickTime AMA and deliver the best

possible performance in this editing environment.

We saw earlier that the Avid codecs are available for both the Mac and the PC from the

Avid web site. Install these on the Authoring stations for these applications, and choose

an Avid codec for the render target.

Possible Problems

All applications have different render dialogues, so below are general guidelines you will

need to interpret for your particular third party application. If something goes wrong

with the link or the playback of the final movie, these are the big three common

problems:

Ensure the FRAME SIZE for your movie is the Avid approved frame size. Each codec has

a legal frame size and if the movies dimensions are off by even a single pixel it is ‘illegal’.

For example, the Meridien compressed codecs require 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, available for download

from the Avid web site.

Ensure VIDEO LEVELS are set correctly. Specifically, encode as RGB any movie made

using ‘graphics’ levels (where digital 0 is black, 255 is white). Encode as 601(SD) / 709

(HD) any movie using ‘TV” levels (where black is 16 and white is 235). Generally, most

graphics applications use RGB levels internally (this includes Photoshop and After

Effects) and RGB is often the correct render setting.

Ensure FIELD ORDER is correct or motion artifacts will occur.

NTSC

LFF, Lower Field, Even Field,

PAL

UFF, Upper Field, Odd FIeld

HDTV

UFF, Upper Field, Odd FIeld

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