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IVTCycles

Bases: CustomEnum

Enum representing different decimation patterns for IVTC (Inverse Telecine) processes.

These patterns are used to remove duplicate frames after double weaving fields into frames. Each pattern defines a sequence of frame indices to keep during decimation.

cycle property 

cycle: int

Get the total number of available pattern variations for this cycle.

cycle_05 class-attribute instance-attribute 

cycle_05 = [
    [0, 1, 3, 4],
    [0, 1, 2, 4],
    [0, 1, 2, 3],
    [1, 2, 3, 4],
    [0, 2, 3, 4],
]

Pattern for standard frame-based 2:3 pulldown.

cycle_08 class-attribute instance-attribute 

cycle_08 = [
    [0, 3, 4, 6],
    [0, 2, 5, 6],
    [0, 2, 4, 7],
    [0, 2, 4, 7],
    [1, 2, 4, 6],
]

Pattern for 2:3:3:2 pulldown.

cycle_10 class-attribute instance-attribute 

cycle_10 = [
    [0, 3, 6, 8],
    [0, 2, 5, 8],
    [0, 2, 4, 7],
    [2, 4, 6, 9],
    [1, 4, 6, 8],
]

Pattern for standard field-based 2:3 pulldown.

pattern_length property 

pattern_length: int

Get the length of the pattern cycle in frames.

decimate 

decimate(clip: VideoNode, pattern: int = 0) -> VideoNode

Apply the decimation pattern to a video clip with the given pattern index.

Source code 
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def decimate(self, clip: vs.VideoNode, pattern: int = 0) -> vs.VideoNode:
    """Apply the decimation pattern to a video clip with the given pattern index."""

    assert 0 <= pattern < self.cycle
    return clip.std.SelectEvery(self.pattern_length, self.value[pattern])

VFMMode

Bases: CustomIntEnum

Enum representing different matching modes for VFM.

The mode determines the strategy used for matching fields and frames. Higher modes generally offer better matching in complex scenarios but may introduce more risk of jerkiness or duplicate frames.

THREE_WAY_MATCH class-attribute instance-attribute 

THREE_WAY_MATCH = 4

3-way match (p/c/n).

THREE_WAY_MATCH_FOURTH_FIFTH class-attribute instance-attribute 

THREE_WAY_MATCH_FOURTH_FIFTH = 5

3-way match + 4th/5th matches on combed (p/c/n + u/b). Highest risk of jerkiness but best at finding good matches.

TWO_WAY_MATCH class-attribute instance-attribute 

TWO_WAY_MATCH = 0

2-way match (p/c). Safest option, but may output combed frames in cases of bad edits or blended fields.

TWO_WAY_MATCH_THIRD_COMBED class-attribute instance-attribute 

TWO_WAY_MATCH_THIRD_COMBED = 1

2-way match + 3rd match on combed (p/c + n). Default mode.

TWO_WAY_MATCH_THIRD_FOURTH_FIFTH class-attribute instance-attribute 

TWO_WAY_MATCH_THIRD_FOURTH_FIFTH = 3

2-way match + 3rd match on combed + 4th/5th matches if still combed (p/c + n + u/b).

TWO_WAY_MATCH_THIRD_SAME_ORDER class-attribute instance-attribute 

TWO_WAY_MATCH_THIRD_SAME_ORDER = 2

2-way match + 3rd match (same order) on combed (p/c + u).