If not providing a filename for video rendering functions, always use the latest self.filename of the corresponding object

[balintlaczko]

Would make everyday use much simpler.

I imagine it as something like this:

lala = mgmodule.MgObject('lala.avi', etc.......) it does all the processes like trim, skip, contrast-brightness, crop, and results in 1 video in the folder which is named 'lala_trim_skip_cb_crop.avi' ...and now I just say: lala.motionvideo() or lala.history() or lala.motionhistory() or just lala.show() and so on... In each case, since I haven't specified an input file, it will automatically use 'lala_trim_skip_cb_crop.avi'.

[balintlaczko]

Done!