public class SampleGroupDescriptionBox
This description table gives information about the characteristics of sample
groups. The descriptive information is any other information needed to define
or characterize the sample group.
There may be multiple instances of this box if there is more than one sample
grouping for the samples in a track. Each instance of the
SampleGroupDescriptionBox has a type code that distinguishes different sample
groupings. Within a track, there shall be at most one instance of this box
with a particular grouping type. The associated SampleToGroupBox shall
indicate the same value for the grouping type.
The information is stored in the sample group description box after the
entry-count. An abstract entry type is defined and sample groupings shall
define derived types to represent the description of each sample group. For
video tracks, an abstract VisualSampleGroupEntry is used with similar types
for audio and hint tracks.
Fields inherited from class net.sourceforge.jaad.mp4.boxes.FullBox