Replacing single frames single, completely, hardware, previous, content

andy

Hello avisynth experts,

is there a possibility in avisynth to dynamically replace single frames with their previous frame, based on the frame content ?

Sounds complicated ? Well, I rushed over an old VHS captured video, that due to slow capture hardware has now and then dropouts that result in completely empty pure blue frames.
This is very disturbing, when watching the video. So I thought there should be a possibility to replace these frames by copies of there previous frames which would result in small stuttering but not in blue flashes during the video ? I have done quite some processing (filtering cutting rendering) with avisynth over the last few years, but I have no clue if my current problem can be fixed with this fantastic tool. Can anybody help me or just confirm that it will not work.   

Thank you in advance
lupus

You could remove those frames containing the blue flashes, which would be a better option I think.

For e.g: If frames 101, 205, 336 amp; 445 are the ones with the blue flashes, then:

Trim(0,100)+Trim(102,204)+Trim(206,335)+Trim(337,444)+Trim(446,..)

You get the idea..[?]

It should be no big deal to create a small function for your problem, but I have no pc I can work with before next week.
So or so a small sample would be nice.