Usability Enhancements

[befocken]

Hey there, nice work with this tool so far (as it's the only thing I could find that also works on Linux...).

While using it, I came across two things that I though might improve the usability of the program with not much work.

• support multiple files as input, to avoid always having to use a for loop when wanting to convert multiple files
  • of course, the -o must then be disabled/ignored, as all files would result in the same filename otherwise
• adding a -q flag for less output (maybe only the name of the output file and the duration it took) and maybe even a -qq flag for no output at all. Can be quite terminal-filling if converting lots of files otherwise ^^.
  • I might even suggest making the proposed -q behavior the default and adding a -v flag for verbose output, which could basically just be all of the output that printed at the moment.