The Secret Life of Machines. Download all three series here. %100 legal and 
authorized by Tim Hunkin.

http://sciencezero.4hv.org/tslom.htm

The problem is in Series 2, Episode One, The Car. About the last third of it 
the field order is backwards. It starts at the segment where a car body is 
shown being straightened. There are lower resolution copies on other sites and 
the series is on YouTube. Every one has the same exact problem, they must all 
have been made from the same bad video capture.

Apparently a field got lost during capture and instead of quitting with a sync 
error or cleanly correcting it, the capture software just blindly went ahead 
and continued.

Since the AVI output was converted to progressive scan there's no *simple* way 
to correct it. Clip the video at the error point, flip the field order of the 
later part then join them back together - easy if it was interlaced.

A normal deinterlace filter just blurs the interlacing artifacts and does 
nothing for the juddering, making the video even worse.

What I'm thinking of is some way to mask every other line starting at the top 
then every other line starting at the second line to create fake fields then 
re-assembling them correctly to restore a properly interlaced image, converted 
to progressive scan to join back to the first part which is good.

I wonder how long it'd take to do that to 16,748 frames in Photoshop... field 
the frames with transparency, re-order the faux fields, flatten, save as an 
image sequence then import into AP and render. Would probably have to convert 
the first part to an image sequence too and render the whole lot to video to 
avoid problems joining the original first part and the rebuilt second part.


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