mcorr fails if input video has less than 1000 frames

[kushalkolar]

traceback, this input video had 300 frames:

---------------------------------------------------------------------------
BatchItemUnsuccessfulError                Traceback (most recent call last)
Cell In [24], line 2
      1 df = df.caiman.reload_from_disk()
----> 2 df.iloc[-1].mcorr.get_output()

File ~/repos/mesmerize-core/mesmerize_core/caiman_extensions/_utils.py:24, in validate.<locals>.dec.<locals>.wrapper(self, *args, **kwargs)
     22 if not self._series["outputs"]["success"]:
     23     tb = self._series["outputs"]["traceback"]
---> 24     raise BatchItemUnsuccessfulError(f"Batch item was unsuccessful, traceback from subprocess:\n{tb}")
     25 return func(self, *args, **kwargs)

BatchItemUnsuccessfulError: Batch item was unsuccessful, traceback from subprocess:
multiprocessing.pool.RemoteTraceback: 
"""
Traceback (most recent call last):
  File "/usr/local/lib/python3.10/multiprocessing/pool.py", line 125, in worker
    result = (True, func(*args, **kwds))
  File "/usr/local/lib/python3.10/multiprocessing/pool.py", line 48, in mapstar
    return list(map(*args))
  File "/home/kushalk/repos/CaImAn/caiman/summary_images.py", line 784, in local_correlations_movie_parallel
    mv = cm.load(mv_name, subindices=idx, in_memory=True)
  File "/home/kushalk/repos/CaImAn/caiman/base/movies.py", line 1447, in load
    return load_movie_chain(file_name,
  File "/home/kushalk/repos/CaImAn/caiman/base/movies.py", line 1774, in load_movie_chain
    m = load(f,
  File "/home/kushalk/repos/CaImAn/caiman/base/movies.py", line 1706, in load
    images = images[subindices]
  File "/home/kushalk/python-venvs/mescore/lib/python3.10/site-packages/numpy/core/memmap.py", line 334, in __getitem__
    res = super().__getitem__(index)
IndexError: index -700 is out of bounds for axis 0 with size 300
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/home/kushalk/repos/mesmerize-core/mesmerize_core/algorithms/mcorr.py", line 95, in run_algo
    Cns = local_correlations_movie_offline(
  File "/home/kushalk/repos/CaImAn/caiman/summary_images.py", line 773, in local_correlations_movie_offline
    parallel_result = dview.map_async(local_correlations_movie_parallel, params).get(4294967)
  File "/usr/local/lib/python3.10/multiprocessing/pool.py", line 771, in get
    raise self._value
IndexError: index -700 is out of bounds for axis 0 with size 300

The issue actually comes from computing the local correlations, we set the default window_size to 1000: https://github.com/nel-lab/mesmerize-core/blob/master/mesmerize_core/algorithms/mcorr.py#L98

We should probably allow a parameter outside of "main" where these things can be set.

[kushalkolar]

this is basically done in #183