It doesn't come up often, but occasionally we get a ProRes file that we need to convert to DPX. In the case of the current situation, it's a ProRes 422HQ 1080p file, but we need DPX for our restoration system. Normally I'd do this in AfterEffects, but I'm wondering if there's a better/more efficient way to do it, say with ffmpeg? Since we don't have AE installed on the restoration system, doing it on one machine and then moving the files means a lot of waiting for file copies to complete. So I'd like to be able to do it right on the restoration PC to save some time.
Googling mostly brings up conversions in the other direction: DPX->ProRes, but that's not what we want here.
My main concern is avoiding any color-related issues when using ffmpeg - gamma shifts, color space changes, etc.
Any suggestions or recipes?