I think it's the batch thing. They can put in one input file and get out multiple formats and resolutions. Also, they have very specific requirements like only

I think it's the batch thing. They can put in one input file and get out multiple formats and resolutions. Also, they have very specific requirements like only encoding 5 seconds at a time for DASH streaming, so they can build the chips with a specific amount of RAM and leave out features like B-frames or whatever they're not using.