Vivotek IP7138 - Manual (Page 51)

“Send Post-event images” The number of post-event images
“File name prefix” The prefix name will be added on the file name of the snapshot
images.
“Add date and time suffix to file name” Check it to add timing information as file
name suffix.
Here is setting for video clip
“Source” The source of stream, stream1 or stream2.
“Pre-event recording” The interval of pre-event recording in seconds
There are two limitations for video clip file.
“Maximum duration” The maximal recording file duration in seconds
“Maximum file size” The maximal file size would be generated.
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“File name prefix” The prefix name will be added on the file name of the video clip.