Handbrake is easier to use, one can see, that it was made for Mac OS X, it can take advantage of all your cores and threads, no one will spam the hell out of it on this forum and it is free.
Example for SPAMMING (might be deleted already when you look): https://forums.macrumors.com/showthread.php?p=12432887#post12432887
if i download a ripped version of a movie and its only a avi file, but it was at one point, HD is there a way to rip and transform it back to its original state in an mkv file with better resolution?
if i download a ripped version of a movie and its only a avi file, but it was at one point, HD is there a way to rip and transform it back to its original state in an mkv file with better resolution?
Not really, as the source was HD and now the result is SD and the SD result does not remember how it was when it was HD, thus you can't get HD out of SD*.
* You can, but it will look abysmal, better to get the HD source.