Filter to catch video white-noise frames

[ed2003wd]

I am using VLC to monitor a drone video transmitter. The signal occasionally drops for a second or two which inserts white-noise frames (TV static or "snow") into the stream which is visually unpleasant.

I want to be able to identify these frames in near realtime and skip them, essentially freezing the displayed picture by repeating the last "good" frame.

Is there an existing plug-in that I could adapt for this purpose?