vcdimager: Access Point Sectors
1.5.3.2 Access Point Sectors
............................
An "Access Point Sector", APS, is an MPEG video sector on the VCD/SVCD
which is suitable to be jumped to directly. APS are required for entry
points and scantables.
APS have to fulfill the requirement to precede every I-frame by a GOP
header which shall be preceded by a sequence header in its turn. The
start codes of these 3 items are required to be contained all in the
same mpeg pack/sector, thus forming a so-called "access point sector".
This requirement can be relaxed by enabling the 'relaxed aps' option,
i.e. every sector containing an I-frame will be regarded as an APS.
*Warning:* The sequence header is needed for a playing device to figure
out display parameters, such as display resolution and frame rate,
relaxing the aps requirement may lead to non-working entry points.
Info Catalog
vcdimager: Alignment
vcdimager: Common Constraints