Re: format factory
Not that many of us have Windows, so we're not immediately familiar with Windows programs and exactly what they do. We also don't know what features you use in whatever program it is.
As far as I can tell, Format Factory is an ad-supported program that converts between video, audio and image formats. I'm not aware of anything on Linux that can do all three types, but Handbrake is pretty decent all-around for converting to video formats for popular media playing devices. If you want more formats, you could try any video editor or just use FFMPEG on the command-line as it's both powerful AND very easy to use, even on the command-line.
For audio formats, Sound Converter is what I tend to use.
For images, you can use Imagemagick or just open them in GIMP and save out.
I try to treat the cause, not the symptom. I avoid the terminal in instructions, unless it's easier or necessary. My instructions will work within the Ubuntu system, instead of breaking or subverting it. Those are the three guarantees to the helpee.