User manual

Appendices : MPEG Settings (MainConcept Encoder)
Page 221
Multiplexer Settings
In this Tab you can control whether your exported MPEG files will be multiplexed (also referred to as “muxed”).
Multiplexed output means that the video and audio are exported in a single file. This Tab also offers some more
professional settings for muxing.
In general, the basic settings for this pane and the other advanced panes are set by the options in the Output for-
mat section of the main window.
Here are the Multiplexer Settings in detail:
Multiplexing Type: The drop-down menu offers the options of MPEG-1, VCD, MPEG-2, SVCD, DVD, TS
(transport stream), None and many more parameters, such as HDV HD1, HDV HD2, DVB
(which can also be used for transport streams), and MircoMV. The settings are usually
defined by the parameters of the MPEG Encoder.
Variable Bitrate When checked VBR is on. This option sets the muxing mode to variable or constant
bitrate. If it is turned off (constant bitrate), the output data stream will contain padding
packets (if needed) to maintain the constant bitrate. In variable bitrate muxing no pad-
ding packets are added.
Pack Options:
Under this heading you find the options Size (bytes) and Packets/Pack. Pack size is the number of bytes in each
pack (or sector); VCD and SVCD use 2324 bytes, DVD uses 2048 and general MPEG-1/2 can use up to 4096 bytes
(4096 is our limit, not MPEG's limit). The muxed bitstream is broken up into these 'packs' with a pack header start-
ing each one and they contain 1 or more PES (= Program Elementary Stream) packets (chunks of the video or
audio stream). The Packets/Pack setting specifies the number of PES packets that are placed in each pack. VCD,
SVCD and DVD always want 1 PES packet per pack.
Mux. Rate (kbps):