User guide

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Working with HD material
Working with HD material
Matrox Axio provides Premiere Pro project presets for many of the common HD
video formats. For each HD video format, Axio provides different HD video
codecs that allow you to capture and export your video at different video
qualities. You can capture your footage using the appropriate codec for the source
material and then combine the footage as needed. For example, you can mix
offline HD, MPEG-2 I-frame HD, HDV, DVCPRO HD, and uncompressed HD
files on the same timeline. For more information about working with Matrox
codecs in your HD project workflow, see the next section, “About the Matrox HD
codecs.”
In some cases, Matrox Axio applies a pulldown method so that you can capture
an HD video format (input format) that is different from the HD format that’s
defined by your project settings. For example, to capture 1080i @ 29.97 fps
source video for use in a 1080p @ 23.98 project, Axio will perform a standard
reverse pulldown on your input video during capture. For more information about
how pulldown can be applied in your HD project, see “Applying pulldown in HD
projects” on page 272.
About the Matrox HD codecs
When creating an HD video project there are a number of editing decisions that
must be made, including the selection of an appropriate HD video codec. Your
Matrox Axio system provides you with different HD video codecs to perform
offline edits and finishing-quality online edits. The following provides a
summary of some Matrox HD video codecs and their most suitable uses:
• Matrox Offline HD codec Captures and exports video to a proxy HD
format to create offline edits that use less disk space. A Video for Windows
(VFW) version of the offline HD codec is available for use with VFW
applications. When this codec is installed on a system without Matrox Axio
hardware, such as a laptop computer, the system can be used to complete
offline editing projects in Adobe Premiere Pro. For some examples of
workflows that use the Matrox Offline HD codec, see “Using the Matrox
Offline HD codec” on page 260.
• Matrox MPEG-2 I-frame HD codec Captures and exports video to an
MPEG-2 I-frame HD format that produces high-quality, low bit-rate video
that can be used for either offline editing projects or online editing projects.
The Matrox VFW MPEG-2 I-frame HD codec allows you to render material
to full HD video using VFW applications, such as Adobe After Effects. On a
system without the Matrox Axio hardware, this codec can be used to render
and play back 1440×1080i/p clips only. For examples of workflows that use
the Matrox MPEG-2 I-frame HD codec, see “Using the Matrox MPEG-2
I-frame HD codec” on page 267.
Axio Installation and User Guide.book Page 259 Monday, July 14, 2008 8:00 AM