User guide

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Using the Matrox MPEG-2 I-frame HD codec

The Matrox MPEG-2 I-frame HD codec allows you to control the data rate of the

video that you are capturing or exporting. At low data rates (about 50 Mb/sec) the

codec can be used to capture video for an offline editing project. At high data

rates (100 Mb/sec or higher), the codec can be used to capture high-quality video

for an online editing project that uses less disk space than an uncompressed video

project. For HD projects that do not require uncompressed video data for

compositing, the MPEG-2 I-frame HD codec can be used to export

finishing-quality HD broadcast video. The VFW MPEG-2 I-frame HD codec

allows you to render and play back MPEG-2 I-frame HD clips in VFW

applications, such as Adobe After Effects. On a system without the Matrox Axio

hardware, the VFW MPEG-2 I-frame HD codec can be used to render and play

back 1440×1080i/p clips only.

MPEG-2 I-frame HD codec workflow example

for offline editing

In this workflow example, the Matrox MPEG-2 I-frame HD codec is used to

capture video clips for use in an offline editing project. The clips are captured

with Matrox Axio at a data rate of 50 Mb/sec and then used to complete an

offline editing project. When the offline edit is complete, the project is trimmed,

and the offline clips are unlinked and then recaptured using a finishing-quality

HD video codec, such as the Matrox MPEG-2 I-frame HD codec at a data rate of

100 Mb/sec or higher or a Matrox Uncompressed HD codec. The online editing

project is then exported to tape for broadcast.

Axio Installation and User Guide.book Page 267 Monday, July 14, 2008 8:00 AM