User guide

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Appendix B, Matrox Axio Workflows
Overview
This appendix provides general information about using various Matrox Axio
project presets and codecs for working with different types of projects 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 project 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, Panasonic P2 or other footage shot at 486p @
23.98 fps and recorded directly to disk as .mxf files, or SD film footage that was
shot at 24 fps, then transferred to tape by telecine processing. You cannot use the
486p @ 23.98 fps project 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, or recorded
to disk in the case of .mxf files. 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 to tape or disk.
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 or disk. In order to use the video with Matrox Axio, we
recommend that you set your camera to use advanced pulldown (called 24PA or
24P Advanced mode on some devices) to convert the footage to 29.97 fps
interlaced video. Matrox Axio will then apply an advanced reverse pulldown
method to convert the source video to 486p @ 23.98 fps for editing clips in
Adobe Premiere Pro.
¡ Importan t When using a Panasonic P2 camera to shoot 486p @ 23.98 fps
material for use with Matrox Axio, you must set the camera to Advanced
mode (486/24pA).
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. To do this, Matrox Axio identifies the A
frames of a sequence as those frames that have time code ending in 0 or 5.
Axio Installation and User Guide.book Page 256 Monday, July 14, 2008 8:00 AM