Fortunately, Compressor can access QuickTime plug-ins such as the x264Encoder plug-in that you can download at MyCometG3. Note that the developer of the site, Takashi Mochizuki, discontinued ...
I have a TV channel that runs at 720/60fps progressive. Much of the content is 24fps sourced, so I usually do an Inverse Telecine (IVTC) to get get back to 24 FPS, when I compress for storage. Just ...