User guide

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Chapter 3, Setting Up Realtime Effects with Adobe Premiere Pro
What is XtremePreview?
XtremePreview lets you edit and preview numerous video and graphics layers
without having to render. You can preview all sources (including multiple Matrox
effects in any order) for the segment you are editing, even if the segment requires
rendering (that is, there is a red bar above the time ruler on the Premiere Pro
Timeline). In addition, with XtremePreview, many combinations of Matrox
effects remain realtime.
Adaptive degradation
Certain complex effects or combinations of effects can cause dropped frames
when previewing. In these cases, XtremePreview performs an adaptive
degradation of the video playback by analyzing the segments and dropping
frames systematically. With each subsequent playback, that is, every time you
replay the clips during the same work session, the segment progressively
becomes smoother.
¦NoteOnce playback of the Timeline has stopped, a red bar will appear over the
segments that have dropped frames to indicate that these segments will require
rendering to perform a Matrox realtime export to disk or export to DV tape. If
you close your project before rendering, the red bar won’t re-appear until you
play your project again.
Rendering while previewing the Timeline
Depending on which XtremePreview mode you chose in the Matrox Advanced
Settings
dialog box (see page 14), you can use different methods to preview
effects on your Timeline. If you are using the
Preview all effects mode, when
you play or scrub the Timeline, XtremePreview performs an on-the-fly render
whenever a non-realtime segment is encountered (that is, an automatic render-
play or render-scrub is performed).
When using the
Preview realtime effects only mode, segments that include
non-realtime effects appear as a “not yet rendered” (X) graphic when played back
from the Timeline. In these cases, you can choose to
Ignore unsupported
effects
, which lets you ignore Premiere Pro’s non-realtime video effects and
transitions, as well as unsupported clip settings, such as field processing options
applied to a clip. To see your segment with all effects applied, you can render-
play (
ALT+SPACEBAR), or render-scrub (ALT+scrub) the Timeline.
The render-play feature is system dependent (that is, the video quality and frame
rate degrade during complex segments). It should, however, provide a good
indication of how a segment will look with all effects applied.
Remarks
• Adjustments to Premiere Pro’s Program view Quality settings affect
segments on which you are using the render-play feature.