Looking far a "bad motion detection" effect

[Wanka]

Hi all,

My request is a bit special, I am trying to configure my video encoder to get an effect you may have seen before, but is a bit hard to explain...

Let's say that we have two scenes : a landscape, and right after, a smiling face; AFAIK the encoder detects the scene change and puts a key frame at the beginning of the "face scene". BUT now, sometimes, maybe because the key frame is corrupted or whatever, the scene change doesn't occur well : the landscape is then distorted according to the face movements, but keeps its color until the next scene... You see what I mean ?

I don't know if this effect has a name, anyway I think it's very cool and would like to make it happen intentionally. I currently have the K-Lite Codec Pack, that has a lot of options but is quite poorly documented... I made some tests and got some fun stuff, but not really what I want

Any idea would be welcome

Thanks !

EDIT : Here is a little exemple with a video which has this "bug"

[jagabo]

AviSynth's MergeLuma() and MergeChroma() will let you combine the luma channel of one video with the chroma channels of another.

[edDV]

The normal similar transition is called a mosaic.

[Wanka]

Thanks for your answers;

What I'm looking for is quite different, I edited my post with a more explicit exemple I just managed to find among my vids ^^
A first clue is that the video where it's from claims it's 14 hours long, while the real length is rather 1h30.

(PS : I just tried AviSynth, it look like an ImageMagick for videos... Nice 8) )

[guns1inger]

There are a couple of expensive bad video effects plugins for the likes of After Effects and Fusion that might do it, but I suspect to get exactly what you want will require you creating custom masks and effects.

[jagabo]

Or take an MPEG file and write random garbage in random locations to cause similar decoding errors.

[Wanka]

Or take an MPEG file and write random garbage in random locations to cause similar decoding errors.

It's the best way I found yet

In theory, I'm convinced it's possible to create this effect by removing a keyframe in the compressed file... But I didn't find any editor who can do that "without thinking".

I'll post if I find something new.

[jagabo]

You might be able to use Ts Packet Editor to locate a key frame and then use a hex editor to screw it up.

[guns1inger]

Not quite the same, but certainly digital damage - this requires After Effects though - http://vfxschool.blogspot.com/