absolutedestiny

For

quu and

trythil

Based on previous discussions, a telecine script for converting 24fps to 29.97fps using blankclip with showframes as base clip.

The following has a number of predefined functions that can be easily called from an external script for simplicity.

Have fun, guys :D

(EDIT: I think there's a problem with the 196 model which means that the last section isnt a multiple of 4. However, given our telecine pattern, it should be fine I think.)

(EDIT2: Actually, no this isnt perfect- frame 799 gets its fields swapped - or so it seems.... we'll have to rethink the pattern a little. I think copying frames 0,201,402,603 might be ok, though.

Yeah, it seems to work better. Script updated with changes)

function Telecine(clip c)
{
c.AssumeFrameBased()
SeparateFields()
SelectEvery(8, 0,1, 2,3,2, 5,4, 7,6,7)
return Weave()
}

function min(int m, int n)
{
return (m < n) ? m : n
}

function NullClip(clip c)
{
return c.BlankClip(length=0)
}

function Trim2(clip c, int start, int "end", int "length")
{
assert(!(defined(end) && defined(length)),
\ "Trim2: end and length parameters cannot be used together")
assert(!defined(length) || length >= 0, "Trim2: invalid length")

end = defined(length) ? (start + length) : default(end, c.FrameCount())
end = (end < 0) ? (c.FrameCount() + end) : end

assert(start >= 0 && start <= c.FrameCount(), "Trim2: start frame out of bounds")
assert(end >= start && end <= c.FrameCount(), "Trim2: end frame out of bounds")

# we can't use Trim(start, end - 1) in case end == 1
return (start == end)
\ ? c.NullClip()
\ : c.Trim(start, -(end - start))
}

function NewTelecineHelper(clip c, int iterLeft)
{
iterLeft = iterLeft - 1

start = iterLeft * 800
end = min(c.FrameCount(), (iterLeft + 1) * 800)

seg = c.Trim(start, -800)

seg1 = seg.Trim( 0, -1) + seg.Trim( 1, 200).Telecine()
seg2 = seg.Trim(201, -1) + seg.Trim(202, 401).Telecine()
seg3 = seg.Trim(402, -1) + seg.Trim(403, 602).Telecine()
seg4 = seg.Trim(603, -1) + seg.Trim(604, 0).Telecine()

c = c.Trim2(0, start) + seg1 + seg2 + seg3 + seg4 + c.Trim2(end)

return (iterLeft == 0)
\ ? c
\ : NewTelecineHelper(c, iterLeft)
}

function NewTelecine(clip c)
{
c.NewTelecineHelper(Ceil(c.FrameCount() / 800.0))
AssumeFPS(29.97)
return AudioDub(last, c)
}

video= BlankClip(length=14400, width=720, height=480, fps=24, color=$000000).ShowFrameNumber()
NewTelecine(video)