user manual

5. Delete the audio and video tracks you created in step 1.
After synchronizing the events, you will have a paired stereoscopic subclip in the Project Media window. You can drag these
clips to the timeline as stereoscopic 3D media.
Tip: If your camera rig used mirrors or inverted cameras and produced flipped or rotated images that were not corrected in
camera, you can correct the clip with the Stereoscopic 3D Adjust plug-in. For more information, see Aligning left- and right-eye
views and adjusting depth on page 55.
Aligning left- and right-eye views and adjusting depth
It is very important that stereoscopic 3D video have differences between the views only in horizontal displacement. Any vertical or
rotational misalignment will detract from the viewing experience and may even cause viewer discomfort. Also, it is important to
limit the amount and direction of horizontal offset to create comfortable depth.
For example, when shooting with parallel-axis cameras, all of the action is usually in front of the screen, and you need to use
horizontal image translation to push most of it behind the screen.
Use the 3D glasses in combination with viewing the output without the glasses to create good alignment and depth settings. You
usually want all of the action behind the screen plane, only crossing the screen plane for dramatic or special effect. However, make
sure never to create divergence, where the left-eye picture would appear more than 2.5 inches to the left of the right-eye picture on
the largest screen where your movie will be shown.
For example, if the largest screen to be used is 16:9 with a 106-inch diagonal, the width is 87 percent of the diagonal, or about 92
inches. With 1920x1080 content, 2.5 inches is only 52 pixels, so make sure your distant objects are never more than 52 pixels apart.
You can use the Stereoscopic 3D Adjust plug-in to adjust horizontal offset, vertical offset, keystoning, and rotation. This plug-in can
be applied at the event level, track level, or video output level. For more information about applying video effects, see Adding video
effects on page 47.
You can use the plug-in’s controls as follows:
Item Description
Horizontal Offset Drag the slider to adjust the horizontal alignment of the left- and right-eye views to
set the perceived position of the video relative to screen depth.
Vertical Offset If left- and right-eye views are not aligned vertically, drag the slider to correct the
offset.
Zoom If left- and right-eye views are not zoomed identically, drag the slider to correct the
offset.
Keystone Drag the slider to correct for image keystoning. Image keystoning occurs when the
left- and right-eye cameras are not parallel.
Rotation Drag the slider to correct for camera tilt in the left- and right-eye views.
Auto Correct Click to analyze video and automatically calculate values for Vertical Offset, Zoom,
Keystone, and Rotation.
Flip Horizontal Choose a setting from the drop-down list to flip the image for horizontally inverted
cameras.
Flip Vertical Choose a setting from the drop-down list to flip the image for vertically inverted
cameras.
Automatic Crop Select this check box if you want to automatically crop the left- and right-eye views
during adjustment to prevent black borders created by the plug-in’s adjustments.
Crop When the Automatic Crop check box is cleared, you can drag this slider to adjust
image cropping.
Tip: 3D depth adjustment is a complex process and is out of the scope of this document. For more information, please review a
reference such as 3D Movie Making: Stereoscopic Digital Cinema from Script to Screen by Bernard Mendiburu.
STEREOSCOPIC 3D EDITING | 55