Actually, I was wondering about this. If you have 2 instances of DCP-o-matic running on same machine and other machines on the network running as encoding servers, is there any risk that frames from the 2 DOM instances get mixed up together? (i.e. encoding servers send frames back to the wrong DOM instance, creating two Frankenstein monster DCPs) James, in answer to your original question: Even if you can do this, I'm not sure why you'd want to. Given that encoding will take up 100% of the CPU, there's no advantage in doing 2 encodes simultaneously. They'll both take twice as long, and I would imagine probably a bit longer as there's the added overhead for the machine of switching between the two processes. As Igor said, you're probably better off using the batch encoder which allows you to queue up as many as you want and it'll run each encode one after another. Hope that helps. Jim On 26/09/2018 13:48, iva_co via DCPomatic wrote: