TYPE: COP
TITLE: Shift COP

This operation shifts an image sequence in time. An optional second input can
be used as a reference, so that this sequence becomes 'linked' to the start or
end of the reference sequence and shifts if they change.

This operation does not use any cache memory.

Parameters
    Shift Method - Sequences can be shifted in several ways if no reference
                   input is connected.
	Relative Shift             - Shifts the amount specified by the Shift
                                     Value.
	Shift Start to Shift Value - Starts at the point specified by Shift 
                                     Value.
	Shift End to Shift Value   - Shifts the image sequence such that it 
                                     ends at the point specified by the Shift
                                     Value.

    Input Shift  - If a reference input is connected, several different ways
                   of linking the two sequences together can be used. The
                   sequence will always follow any changes in the reference
                   sequence's start or end time.
	Align Start with 2nd Input's Start - ~s
        Align End with 2nd Input's End - ~s
        Shift To Precede 2nd Input - ~s
        Shift To Follow 2nd Input - ~s

    Shift Value   - The amount to shift by, in either frames or seconds.
    Units         - The shift units, either Frames or Seconds.

Local Variables:
    L   - Sequence length
    S   - Start of sequence
    E   - End of sequence
    IL  - Input sequence length
    SR  - Sequence frame rate  
    NP  - Number of planes in sequence
    W,H - Width and height of image

See Also: Shuffle, Sequence, Snip, Trim
