Finally got around to ripping old blurays and am following the MakeMKV > MP4Tools > iTunes/Apple TV(3) formula. MakeMKV process worked fine. When trying to go from .mkv to m4v vis MP4Tools I'm running into difficulty. The process seems to be running normally up an through the "Finalizing..." phase. I note two large m4v files generated, one with an "out_..." prefix and another with the "expected" file name, both several GB large. However, once MP4Tools hits completion, just a single .m4v file remains, but with a size of a few MB, amounting to essentially the first few seconds of the movie. Am I missing something/committing newbie sin?