Apple Compressor 3 Manual do Utilizador descarregar pdf (Página 278)

The lower frame rate also has the advantage of requiring fewer frames per second of

video, leading to smaller file sizes. The reverse telecine feature makes it easy to do this.

A BA B B CC D D DA A B B B C C D D D A A B B B C C D D D A A B B C C D D D A A B BB CC D D D A BA B B CC D DB D

A B C D A D A B C D A B C D A B C D A B C D

B C

A B C D

A A B B C C D D

Field

Before (29.97 fps)

After (23.98 fps)

One second

3:2 Pull-Down Removal

About the Cadence

When film is telecined to NTSC video, it has a constant cadence. This means that the 3:2

pattern is consistent and uninterrupted. It is relatively easy to remove the telecine from

a constant cadence clip since you only have to determine the pattern once.

If you take these telecined clips and edit them as NTSC video, the result will be a final

video file that has a broken cadence with an inconsistent 3:2 pattern. It is much more

difficult to remove the telecine from this clip since you have to constantly verify the

cadence to make sure you don’t inadvertently choose incorrect fields when creating the

23.98 fps video.

The Reverse Telecine feature included with Compressor automatically detects broken

cadences and adjusts its processing as needed.

Other Reverse Telecine Issues

There are a few other issues to be aware of when you use the Reverse Telecine feature.

All Other Frame Controls Settings Are Disabled

Since the goal of the Reverse Telecine feature is progressive 23.98 fps video, all the other

options of the Frame Controls pane are disabled when Reverse Telecine is selected.

278 Chapter 23 Working with Frame Controls

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Apple Compressor 3 Manual do Utilizador Página 278