Matrox Axio Installation And User Manual page 83

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1440 × 1080i/p clips are automatically upscaled when added to a 1080i/p (1920 × 1080)
sequence, and don't require you to use Adobe Premiere Pro's "Scale to Frame Size"
feature.
Remarks
Realtime scaling is not supported for the following:
720p clips in an SD sequence, and SD clips in a 720p sequence.
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Matrox offline HD clips.
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Matrox .avi files with alpha.
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Matrox 10-bit uncompressed interlaced clips in a sequence that has a
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progressive video format, such as 10-bit uncompressed NTSC clips in a
1440 ×1080p @ 29.97 fps sequence.
Sony XDCAM HD422 .mxf files.
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Sony XDCAM EX 1080p @ 23.98 fps SP-mode (1440 ×1080) .mp4 files
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in an SD sequence.
Sony XDCAM EX 1080i/p HQ-mode (1920 ×1080) .mp4 files in an SD
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sequence.
Mixing SD and HD clips in a sequence
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