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Argus Encoder Family Version 2.6 API Developer’s Guide
Setting the Registry for Ligos Encoding
If you assign a value of 1 to the Ligos Flag, the Real Flag, or the Windows Media
Format Flag in the
DualEnc
Registry table, you'll also need to configure the Reg-
istry table pertaining to the activated stream type. The next three sections of this
document describe in detail the key settings for Ligos, Real Networks, and Win-
dows Media Format multi-stream encoding.
Setting the Registry for Ligos Encoding
If you want your secondary stream to be in MPEG-1 format, select the
LigosEn-
abled
option in the
DualEnc
Registry table. When this feature is turned on, your
encoding session will result in a primary MPEG-2 stream and a secondary
MPEG-1 stream. Encoded by the Ligos GoMotion MPEG-1 software encoder
and muxed by Vela's proprietary Mux software, the MPEG-1 stream starts on
precisely the same frame as the MPEG-2 stream, matching its content frame-by-
frame to the end of the encode. (The Ligos stream will end one frame before the
primary stream.) It can be encoded in SIF (352 x 240/288) or QSIF (176 x 120/
144) resolutions, as defined in the
DualEnc
Registry table, with the QSIF requir-
ing less CPU usage than the SIF.
Use the Registry keys in the
LigosMpeg1
table (Table B-3) to set most of the
properties for the Ligos MPEG-1 stream. Note that the audio sample frequency
for the MPEG-1 stream will be set automatically to that of the MPEG-2 stream.
However, note that the Ligos encoder does not support a sample rate of 32,000.
