Telestream Lightspeed Live Capture User Manual page 243

Managing Video Sources
245
Configuring SDI Sources
SDI cable from router port 152 to the SDI port you're configuring, which does not
change.
Force 8-Bit Video—8-bit video should only be used with 8-bit codecs such as XDCAM.
When enabled, activates 8-bit down-sampling of the SDI video. Using 8-bit sampling
should be used
offers more efficient compression. Disable to utilize 10-bit video, which
for all 10-bit codecs such as ProRes.
Ignore VPID—An SDI source displays Loss of Signal when the embedded VPID data is
not valid for the source. In normal use, VPID data should match the SDI source and it is
expected that a new source process is created when the source changes; for example,
when the frame size or frame rate changes.
If the VPID does not match the source frame rate and frame size after an upstream
source is switched, you can enable Ignore VPID to ignore the VPID data to avoid loss of
signal during recording.
Freeze on LOS—When enabled, causes the source to hold the last good frame if the
signal is lost. When disabled, LOS causes the LOS Video Test Pattern to be displayed. For
details, see Loss of Signal Behavior.
Preferred Processor
Note: If this control doesn't display, processor balancing on this model server is
performed automatically, and no end-user adjustment is available, or advanced mode
is disabled (see Managing System Settings). Use only when capturing SD/HD SDI
sources—disable it when capturing UHD/4K.
When enabled (C2+ and earlier), processing associated with each Capture | Tape job is
assigned to the assigned CPU on the server's multi-core CPU to prevent inefficient
process mapping across CPU sockets during heavy loads, typically when several
sources are capturing concurrently.
On C4 and later models, for IP sources you can manually set affinity to a specific socket.
If you create IP sources in order and use them in order, balancing is automatic. However,
for example, if you delete every other IP source, the remaining sources do not balance
and you can use can use this control to balance them. If IP sources are maintained long
term, it may be helpful to assign each source a preferred processor.
Disabling this option during multi-source capturing may result in excessive CPU usage.
When Preferred Processor is disabled, affinity is set to 0 (Balancing CPU Processor Group
Affinities).
LOS Video Test Pattern—Applies only when Freeze on LOS is disabled. Specifies the
test pattern to display during LOS. For details, see Loss of Signal Behavior.
LOS Audio Test Signal—Specifies the audio signal to use during LOS.
Max Time-Shift—Specifies the maximum duration of video that the time-shift frame
buffer can hold, which is used to delay the source for workflows using this source.
Specifies the duration in seconds (maximum: 10). Some limitations may exist for higher
bit rates and frame rates.
Lightspeed Live Capture User Guide