Convert FLV to Other Formats with high speed for Mac Convert more in less time by converting them in batches simultaneously ? without slowing your computer down! Customize File Size and Format File size and the parameters can be flexible to customize and choose. If you want to compress or expand your file size, you could do so by using the bit rate calculator, just type in the file size you want and the calculator will do the rest for you. Preview and Snapshot You can preview original and edited movie with the built in player; take a snapshot of a scene you like and save as JPEG picture file. Split Video Split a large file into several so you can fit them to play on your device by segments; you can set a split time or split size so it automatically divides these files uniformly. Convert Video Segment Clip only a segment from a video you choose by specifying the start time and duration.