@Traviss What make/model camera are you using? Does it have an A/V output?
Your current solution is certainly one fine way to convert HDMI to YPbPr. If you want to ditch the computer, there are many different converter options out there. Simply search for “HDMI to component (or YPbPr)” converters online. Some people even use an HDMI to SDI converter into an SDI to analog converter.
Here’s a thread on the forum that offers a number of user experiences and suggestions: