It’s a style you’ve probably seen at the end of theatrical features –
during the rolling titles listing the credits, small windows also roll
onto the screen showing highlights or outtakes from the production.
Here, we’ll combine VelocityHD’s DVE capabilities with HD title rolls
in real time to create this effect, with an additional layer of motion
video in the background. This tutorial is based on using 1080/59.94i
uncompressed HD material. To start, bring your background video clip
onto the timeline and place it on track V1.

We don’t want the background video to be too prominent and detract from
the credits and foreground, so we’ll remove the color from it, and
partially fade it. Select this clip on the timeline and hit
on the keyboard (or click the video effects button or right-click) to
open the Apply Effects dialog box. Double-click on the Video Proc Amp
effect (under Real Time Filters) to expand the effects window to
include Proc Amp controls. Lower the chroma saturation to 0, and click
the Apply/Close button. Now right-click on the clip and select Custom
Fade. Set the transparency to 50 percent and hit Apply/Close. The
background video is now much more subtle.

Take your credit roll (created with the bundled Inscriber TitleMotion
HD Pro) and put it on V2. You can drag the "in" and "output" of the
title roll to time-stretch or compress it to your desired duration,
thus affecting the roll speed. You can play the timeline now to
immediately see the roll playing over the background in full quality,
so you can adjust the speed and duration if desired.

Choose a line of the credit roll with which you want to line up the top
of the foreground video window as it rolls on, and scrub the playhead
to the point in the timeline just before that line of text rolls onto
the screen. Double-click on the foreground video clip in the Gallery to
load it into the Trim Window, and trim its length as desired. You want
the clip to be placed on track 3 in the timeline, so hit
(the number-pad 3 key) or select V3 in the target
track drop-down selector in the Trim Window. Hit <=> on the
keyboard (or click the "Overwrite from In Point" button in the Trim
Window) to place the track on the timeline starting at the playhead
position.

Select the newly added clip, and double-click on DVE Effect in the
Apply Effects dialog box. On the Perspective tab, use the Image Size
control to scale the foreground clip to 25 percent of its original
size. In the Position control, change the X value to horizontally
position the window relative to your credits text- in our example,
0.250. Use the Cursor in the Apply Effects window to scrub until the
line of text chosen in Step 4 is aligned with the top of the foreground
video window, and click the Add button to create a keyframe. Now we
just have to make it roll on. Move the Cursor back to the beginning,
and set the Y position to 0.600. Now the foreground video should roll
on at the same speed as the text, with the top of the window lined up
with the desired text line, and stopping and holding when it reaches
the center of the screen. The timing can be refined if necessary by
adjusting the Y position. Throughout this process, you will see instant
feedback on the HD output monitor as you make adjustments, and you can
click the Play button at any time in the FX window to check your timing.

Finish the effect by clicking the Transparency tab in the DVE Effect
window and selecting the 15 percent Fade Out preset. This will cause
the foreground video window to fade out (after rolling onto the screen
and holding its position while playing). Using the DVE’s additional
features, you can also add borders, expand the foreground window to
full-screen when it lands in position and more. Click Apply/Close to
finish. It’s ready to play back in real time. You can also add another
dynamic graphics layer on track V4- a static logo overlay, a text crawl
or another text roll- and still have instant full-quality playback.

Mike Nann
Product Marketing Manager
Leitch Technology

Mike has focused his technical and marketing background on
computer-based media production solutions since desktop editing was in
its infancy, and joined Leitch with its acquisition of DPS (Digital
Processing Systems) in 2000. Mike holds a Computing Science degree from
Simon Fraser University.

Traditionally, even just doing a title roll in high definition required
rendering in a nonlinear editing system. VelocityHD’s real-time
capabilities make such rolling titles easy, allowing two dynamic
graphics streams (including rolls, crawls and static overlays) to be
easily combined with motion video and other effects in real time in
full quality, immediately ready for final output.

Extensive format flexibility, including 720p, 1080i, 1080PsF and SD
formats; uncompressed and full-raster compressed video lets you choose
your preferred balance of quality and storage; HDV support includes the
ability to seamlessly mix content from HDV sources with other HD
formats on the timeline; Panasonic VariCam variable frame-rate
processing lets you take full advantage of VariCam’s advanced modes and
fully integrated multi-camera editing.

Leitch Technology
www.leitch.com/post
150 Ferrand Drive
Toronto, Ontario, M3C 3E5 Canada
ph. 416.445.9640