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Overview
This appendix provides general information about using various Matrox Axio
sequence presets and codecs for working with different types of sequences in
Adobe Premiere Pro. Workflow diagrams and descriptions are used to help
explain the specific workflow details.
Working with SD "24P" material
Matrox Axio allows you to choose a Premiere Pro preset to work with SD
material originally acquired at 23.98 fps or 24 fps. When you select the Matrox
486p @ 23.98 fps sequence preset, you can edit SD material as 23.98 fps
progressive video as long as the source video was originally acquired at 23.98 fps
or 24 fps. This includes video that was captured to tape by a camera capable of
shooting 486p @ 23.98 fps video, and SD film footage that was shot at 24 fps,
then transferred to tape by telecine processing. You cannot use the 486p @
23.98 fps sequence preset to capture or edit video that was originally acquired as
NTSC or PAL.
Regardless of its origin, SD material that is acquired at 23.98 fps (or 24 fps then
transferred to video tape using telecine processing) must undergo a format
conversion to NTSC (486i @ 29.97 fps) when it is recorded to tape. This means
that the output from your source device and input to Matrox Axio is always
NTSC. Your source device outputs the 23.98 fps material as NTSC by applying a
pulldown method when it records the material.
Some DV cameras that are capable of shooting 23.98 fps progressive video have
the option of performing either a standard or advanced pulldown for recording
material to tape. Matrox Axio allows you to capture 486p @ 23.98 fps DV
material natively over the 1394 interface to a Matrox .m2v file so that you can
import the file to Adobe Encore for DVD authoring. During capture, Matrox
Axio detects the original pulldown method in the DV stream, and then performs
either a standard or advanced reverse pulldown.
For film footage shot at 24 fps, standard 2:3 pulldown is the method most often
used in the telecine process to insert the additional video fields required for the
24 fps to 29.97 fps conversion. In this case, Matrox Axio performs a standard
reverse 2:3 pulldown during capture of analog or SDI video. To do this, Matrox
Axio identifies the A frames of a sequence as those frames that have time code
ending in 0 or 5. The analog or SDI output from your 486p @ 23.98 fps sequence
on Matrox Axio is always NTSC. Axio provides the option to apply either an
advanced or standard pulldown. In most cases, you would want to perform a
standard 2:3 pulldown when you export your 486p @ 23.98 fps sequence to tape.
For more information about pulldown, see
Standard and Advanced
Appendix B, Matrox Axio Workflows
Appendix A, "Understanding
Pulldown."
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