I thought some fun might be appropriate while we all hide out from the zombie apocalypse.

Objective:

Create a telecine that is judder free.

(I've tried to adjust text wrapping so that the lines don't wrap. I hope it works.)

Mental Preparation:

Here are the 2 flavors of telecines (which I call "t30")

p24 = [A/a__________][B/b__________][C/c__________][D/d__________]

t30e = [A/a_______][B/b_______][B/c_______][C/d_______][D/d_______] ...2-3 pull-down

t30o = [A/a_______][A/b_______][B/c_______][C/c_______][D/d_______] ...3-2 pull-down

|<--------------------------1/6s-------------------------->|

(I hope you see what my peculiar notation is trying to convey.)

Action:

Starting with t30e (i.e., 2-3 pull-down), make a 60 FPS that's judder free.

t30e = [A/a_______][B/b_______][B/c_______][C/d_______][D/d_______] ...2-3-2-3

t60e = [A/a_][A/a_][B/b_][B/b_][B/c_][B/c_][C/d_][C/d_][D/d_][D/d_] ...2x FPS

(c) (c) (b) (c) (p) (u) (p) (c) (c) (c) ...fieldmatch, top matching

t60 = [A/a_][A/a_][A/b_][B/b_][B/b_][C/c_][C/c_][C/d_][D/d_][D/d_] ...5-5-5-5 result

As you can see, applying the (ccbcpupccc) top fieldmatch filter, the result should be judder-free.

Action:

Starting with t30o (i.e., 3-2 pull-down), make a 60 FPS that's judder free.

t30o = [A/a_______][A/b_______][B/c_______][C/c_______][D/d_______] ...3-2-3-2

t60o = [A/a_][A/a_][A/b_][A/b_][B/c_][B/c_][C/c_][C/c_][D/d_][D/d_] ...2x FPS

(c) (c) (c) (u) (p) (u) (c) (n) (c) (c) ...fieldmatch, top matching

t60 = [A/a_][A/a_][A/b_][B/b_][B/b_][C/c_][C/c_][C/d_][D/d_][D/d_] ...5-5-5-5

As you can see, applying the (cccupucncc) top fieldmatch filter, the result should be judder-free.

So using the appropriate fieldmatch, judder-free 60 FPS can be achieved from either t30e or t30o.

I assume this has not been tried before.

Can someone try it or help me to construct the appropriate command line?

Regards,

Mark.

PS: If this works, I'll next try to apply it (or something similar) to a 30 FPS stream that is a mix

of telecine & NTSC interlace (such as found in "Making of" movie extras).

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