btw. is there some way to roughly predict the size of the LWLibavVideoSource index.
Since I can't specify where the index should be created, I normally use to let LWLibavVideoSource create the index inside the RAM, problem is on large files the index gets to large for Avisynth to handle, so I would like to predict the size before indexing a file so I can decide whether to use LWLibavVideoSource or not.