Apple DVD Studio Pro 4 - Manual (Page 75)

• You cannot use still images in the V2 through V9 streams. You can use still images in
the V1 stream as long as they are outside of the mixed-angle areas (places where video
is present in the V2 through V9 streams).
Requirements for MPEG Streams in Multi- and Mixed-Angle Video
The integrated MPEG encoder produces streams that meet the criteria for multi- and
mixed-angle use:
• With multi-angle tracks, all streams must be the same length. With mixed-angle tracks,
all alternate streams in each mixed-angle section must be the same length.
• All streams must have the same resolution and frame rate.
• The length and pattern of GOPs (Group of Pictures) must be the same for all streams
(angles). If you are not using the integrated MPEG encoder, use an encoder that allows
you to turn scene detection off.
• All GOPs should be closed. You will not be able to cleanly switch between the streams
if you use open GOPs.
Using Final Cut Pro and Compressor
In addition to the chapter and compression markers you can manually add to a video
clip in Final Cut Pro and Final Cut Express, compression markers are automatically added
at each edit point.
The manually added chapter and compression markers (also known as named markers)
are processed by the integrated MPEG encoder and by Compressor when used directly.
Be sure to add identically placed chapter and compression markers to each video clip
you intend to use in a mixed- or multi-angle track.
The integrated MPEG encoder ignores the automatic compression markers, because they
can alter the GOP structure and make the clip unusable for mixed- and multi-angle tracks.
You can either set Compressor to process the automatic compression markers or ignore
them. The Extras pane of the Compressor MPEG-2 presets includes an “Include chapter
markers only” checkbox. Select the checkbox to force Compressor to ignore the automatic
compression markers if you are encoding clips for use in a mixed- or multi-angle track.
See
Using Compression Markers to Improve the MPEG Encode for more information about
compression markers.
Maximum Bit Rates for Multi- and Mixed-Angle Tracks
The maximum bit rate for a multi- or mixed-angle track is different from other tracks. Due
to the way the DVD specification requires video streams to be multiplexed together, the
number of video streams determines the maximum video bit rate you can use. Following
is a list of maximum combined bit rates (highest bit rate video stream + all audio streams
+ all subtitle streams) you can use for each multi- and mixed-angle track.
75 Chapter 4 Preparing Video Assets