Can't record video stacks in camera module

[campagnola]

Clicking the "record stack" button in camera module results in the following:

Traceback (most recent call last):
  File "C:\Users\lukec\acq4\acq4\util\imaging\record_thread.py", line 133, in run
    self.handleFrames(newFrames)
  File "C:\Users\lukec\acq4\acq4\util\imaging\record_thread.py", line 191, in handleFrames
    self.writeFrames(recFrames, dh)
  File "C:\Users\lukec\acq4\acq4\util\imaging\record_thread.py", line 211, in writeFrames
    self.currentStack = dh.writeFile(data, 'video', autoIncrement=True, info=frames[0][1], appendAxis='Time', appendKeys=['translation'])
  File "C:\Users\lukec\acq4\acq4\util\DataManager.py", line 746, in writeFile
    fileName = fileClass.write(obj, self, fileName, **kwargs)
  File "C:\Users\lukec\acq4\acq4\filetypes\MetaArray.py", line 41, in write
    data.write(os.path.join(dirHandle.name(), fileName), **args)
  File "C:\Users\lukec\Miniconda3\envs\acq4\lib\site-packages\MetaArray\__init__.py", line 943, in write
    return self.writeMa(fileName, **opts)
TypeError: writeMa() got an unexpected keyword argument 'appendKeys'

[outofculture]

appendKeys is not supported by the old .ma format MetaArray files. pip install h5py to use the newer format.

[campagnola]

Turned out that the hdf5 package was broken, but this error was silently hidden. Better to require hdf5 by default and allow writing old-mode only by explicit request.

[outofculture]

Hmm. That would break existing code that depends on MetaArray, but I can start the deprecation cycle on MetaArray now. We can also just make the requirement explicit and early in ACQ4's startup. I'll do that, too.