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This codec is supported only for 1080i and 720p sequences (in 1080p
sequences, DVCPRO HD clips are supported for playback only). The
Matrox VFW DVCPRO HD codec lets you render material to DVCPRO HD
format using VFW applications, such as Adobe After Effects.
¦ Note
The Matrox VFW MPEG-2 I-frame and Uncompressed codecs are also
available in "+ Alpha" versions that let you render compositions to an .avi file
that includes the alpha-key information. For details, see
Matrox Axio with Video for Windows
Using the Matrox MPEG-2 I-frame HD codec
for online editing
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 high data rates (100 Mb/sec or
higher), the codec can be used to capture high-quality video for online editing,
and uses less disk space than required for uncompressed video. For HD projects
that do not need uncompressed video data for compositing, the MPEG-2 I-frame
HD codec can be used to export finishing-quality HD broadcast video. The
Matrox 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.
MPEG-2 I-frame HD codec workflow example
for online editing
In this workflow example, the Matrox MPEG-2 I-frame HD codec is used to
capture video clips for online editing. The clips are captured with Matrox Axio at
a data rate of 100 Mb/sec or higher and then used to complete an online editing
sequence in Adobe Premiere Pro. A VFW application is also used to render the
clips in a compositing project using the Matrox VFW MPEG-2 I-frame HD
codec. When the edit is complete, it is exported to tape for broadcast.
Using the Matrox MPEG-2 I-frame HD codec for online editing
Chapter 10, "Using
Programs."
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