Appendix A — General Registry Settings 87The Mux Registry TableThe Mux Registry TableMost of the entries in the Mux Registry location relate to the multiplexing of audioand video elementary streams into an MPEG system, program, or transport stream.Note that if AdjustGopTimeCode is set to 1, then the GopTcStart field identifiesthe first GOP time code. The GopTcStart value is automatically set by Filter Man-ager during Cue(), based on the mark-in value in the VTR tableSpectrum users note that when the Ligos multi-stream option is turned on, twomux components are created: one for the primary stream and another for theLigos MPEG-1 stream. The Mux Registry table for the primary stream is called“Mux.” The table for the Ligos stream is called “LigosMux.”The Filter Manager automatically sets all of the LigosMux keys except Adjust-GOPTimeCode, which the application developer may set to either 0 or 1.Mux Registry TableProperty Registry Key DataType Value Set CommentsAudio PESPacket SizeAudioPktSize Long Default is 1728 Size in bytes of an audio PESpacket. May be overridden,especially for transportstreams.Video PESPacket SizeVideoPktSize Long Default is 1728AudioStream IDAudioStreamID0AudioStreamID1Long Default is 0 forfirst audiostream, 1 forsecond audiostream.PES-header stream ID of audiostream.VideoStream IDVideoStreamID Long Default is 0 PES-header stream ID of thevideo stream.AudioStream PIDAudioStreamPID0AudioStreamPID1Long Default is 640for first audio,641 for second.Transport-stream PID for audiostream.VideoStream PIDVideoStreamPID Long Default is 512 Transport-stream PID for videostream.Table A-5. Mux Registry Table
