You will need to nullqueue these events.
These look like process monitoring events, so dropping just the events with your noisy process is the way to go.
I am going to assume these arrive with the sourcetype=proccess_logs.
I am also going to assume that whilst you have version 5.7 installed today it could be 6.0 in the future.
On your HF, or Indexers (whichever occurs first in the Splunk event flow path)
props.conf
[proccess_logs]
TRANSFORMS-drop_cctv_events=drop_cctv_events
transforms.conf
[drop_cctv_events]
REGEX=ProcessName\=.+camera\ssystem\scenter\s\d\.\d\\camerasystem\.exe
DEST_KEY=queue
FORMAT=nullQueue
This will only apply for data arriving from the time of the change, but this should prevent these logs being indexed in the future.
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