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Determining the field capture information – Apple Cinema Tools 3 User Manual

Page 114

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114

Chapter 6

Preparing the Source Clips for Editing

Determining the Field Capture Information

You need to enter field capture information in the Reverse Telecine dialog. Typically, all
of your clips are generated with the same hardware and settings, so you only need to
look at a few frames of one clip to determine the field capture mode. A clip can be
captured as one field or both fields, with field 1 or field 2 dominance.

Look at the key number and timecode window burn on the video frames to determine
the frame sequence and verify whether the video has one or two fields. The key
number window burn usually includes the A, B, C, and D frame type indicators. (Also,
the timecode often has the number “1” at the end to indicate field 1, and “2” to indicate
field 2.) In the Clip window, use the arrow keys on your keyboard to step through a few
frames of a clip and observe the sequence of film frame numbers. Refer to the table
below to find out your field information.

If the repeating frame
sequence is

Then your video contains

In the Reverse Telecine dialog,
select as Capture Mode

AA, BB, BC, CD, DD

or

A1A2, B1B2, B3C1, C2D1, D2D3

Both fields, with field 1
dominance

F1 - F2

AB, BB, CC, DD, DA,

or

A2B1, B2B3, C1C2, D1D2, D3A1

Both fields, with field 2
dominance

F2 - F1

A, B, B, C, D

or

A1, B1, B3, C2, D1

One field, with field 1
dominance

Field 1 Only

A, B, C, D, D

or

A2, B2, C1, D1, D3

One field, with field 2
dominance

Field 2 Only

UP01101.Book Page 114 Thursday, March 10, 2005 3:16 PM