Matrox Electronic Systems Matrox RT.X2 - Manual (Page 28)

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Chapter 3, Defining Your Adobe Premiere Pro Settings
Mixing SD and HD clips in a project
Matrox RT.X2 supports realtime playback of SD clips in an HD project, and HD
clips in an SD project. To do this, however, the clips must be scaled to your
project’s frame size. If you want the scaling to be performed when you import the
clips into your project, choose
Edit > Preferences > General and select
Default scale to frame size . This option does not affect clips that have already
been imported into your project. To scale individual clips in a sequence,
right-click the clip in the
Timeline panel and choose Scale to Frame Size .
Because you can also mix interlaced and progressive clips that have the same
frame size and frame rate in a project, when you apply realtime scaling to a clip it
will play back in real time even if the clip’s scanning mode (interlaced or
progressive) doesn’t match your project.
Depending on your project’s video format, realtime scaling of clips is supported
as shown in the following table:
Remarks
Realtime scaling is not supported for the following:
$
Matrox offline HD clips.
$ Matrox .avi files with alpha.
$
Sony XDCAM EX 1080p @ 23.98 fps SP-mode (1440 × 1080) .mp4 files
in an SD project.
$
Sony XDCAM EX 1080i/p HQ-mode (1920 × 1080) .mp4 files in an SD
project.
Project video format Supported realtime scaling of clips
NTSC Downscale 1440 × 1080i/p @ 29.97 fps
PAL Downscale 1440 × 1080i/p @ 25 fps
486p @ 23.98 fps Downscale 1440 × 1080p @ 23.98 fps
486p @ 29.97 fps Downscale 1440 × 1080i/p @ 29.97 fps
576p @ 25 fps Downscale1440 × 1080i/p @ 25 fps
1440 × 1080i @ 25 fps Upscale PAL and 576p @ 25 fps
1440 × 1080i @ 29.97 fps Upscale NTSC and 486p @ 29.97 fps
1440 × 1080p @ 23.98 fps Upscale 486p @ 23.98 fps
1440 × 1080p @ 25 fps Upscale PAL and 576p @ 25 fps
1440 × 1080p @ 29.97 fps Upscale NTSC and 486p @ 29.97 fps