Matrox Electronic Systems Matrox RT.X2 - Manual (Page 191)

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Using the Matrox MPEG-2 I-frame HD codec
Using the Matrox MPEG-2 I-frame HD codec
¦ Note The Matrox MPEG-2 I-frame HD codec is not supported for capture or
export on Matrox RT.X2 SD.
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 and export video for an offline editing project. At
high data rates (about 90 Mb/sec), the codec can be used to capture and export
high-quality video for an online editing project. 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
RT.X2 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 RT.X2 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 the Matrox MPEG-2
I-frame HD codec at a data rate of 90 Mb/sec or higher. The online editing
project is then exported to tape for broadcast.