Fix an issue that would not let the associated audio be removed if it was not found.
Process the filter chain in a parallel manner with a controlled amount of parallelism.
Fix a memory hogging bug in Nutcracker. When it was loading movie images, it was loading them all up a once and then iterating across them. if you get to many of these going at the same time, i.e. show rendering, it will blow memory out big time. Fix to load a file name list of the images and then only load the image one at a time when rendering and then dispose of it.