resize - Extend or crop input buffer.
Inputs:
in [BUFFER] [REQUIRED]: input buffer.
start [FLOAT] [OPTIONAL]: start position in seconds.
end [FLOAT] [OPTIONAL]: end position in seconds.
Outputs:
out [BUFFER]: output buffer.
resize will crop or extend the given buffer based on the start and end parameters.
start can be negative in which case a blank will be prepended to the output buffer.
end can exceed the input buffer duration in which case a blank will be appended to the output buffer.