Hello Tiffhan,
SolveigMM products don't do the entire file recompression, but do a remultiplexing of your source file. However, the remultiplexing this does not make your file much larger whereas the recompression sometimes does. So our products should not add much to your file, but the best way is to test it yourself with the specific file. Solveig products have an evaluation period when you can try the software with some restrictions.