How many camera sources, HDMI/SDI plus NDI, can I input to a Wirecast Gear 3 before performance starts to fall?
I would like to use a Wirecast Gear 3 HD SDI or a Wirecast Gear 3 4K HDMI for a setup that has 4 cameras (or 5 if it's the 4K HDMI model) coming in via SDI or HDMI plus 4 cameras coming in over NDI.
Just to give an idea of the processing load: I will be using it to stream to a single destination (YouTube or restream) at 1080p. I will have lower thirds and some of my shots (maybe no more than 3) will have multiple cameras similar to what can be seen on the popular news networks (fox, cnn). At the same time I would also like to be able to record my program feed to the local HD at 1080p. I will have two displays attached - one for the wirecast interface and the other for Multiview showing the various camera feeds.
My concern is if the system is built to comfortably handle the load above without any drop in performance. Can anyone advise based on actual experience?
There are variables including the encoders and file sources. Generally, you want the CPU to stay under 60% and never hit 80%. Using NVENC encoder can be lower than x264. Local recording using ProRes or using the same encoder as streaming can help as well. If you don't need 4K sources use HD. SDI and HDMI otherwise are similar in resource use. NDI will use more decode resources than SDI or HDMI. NDI HX even more than NDI. Use 30fps instead of 60fps which may only be important for fast action sports. Again there are a lot of variables. You do need to know how to avoid using more resources than necessary.
Thank you very much for your prompt response. I have tried to contact Gear Specialist multiple times but no one has ever contacted me. I just tried again. I'll keep my fingers crossed. 🤞🙂
I understand your advice basically regarding making sure that all settings are optimized to reduce resource usage. Thanks. I was just wondering if, given all the best settings, anyone was able to use one of the Gear models with the number of cameras that I would like to use (i.e. 4 via HDMI and 4 via NDI). Hopefully if I get through to the specialist they can add to your advice.
One question though. You said "If you don't need 4K sources use HD." My only reason for considering the Wirecast Gear 3 4K HDMI model is because it has 4 HDMI and 1 SDI which is 5 camera inputs. Which hopefully can all function simultaneously. Can I connect a 720p or 1080p camera feed as an input into the Wirecast Gear 3 4K HDMI model or will it only accept 4k camera video feeds?
Howdy David! Apologies, we haven't seen anything come through. The Gear 610 4K HDMI could handle that workflow (4 HDMI / 4 NDI connections). That's a heavy front end so we'd need to watch the outputs. With 8 connected sources we'd need to limit the outputs to 1 stream and 1 program record. That would be recommended, of course we could test 2 streams and task the GPU specifically. The safe answer would be 1 stream 1 program record! A good point was brought up here. You can use 1080p cameras in a Wirecast 4K canvas. I do it all the time and it looks great (bumped resolution holds quality). You can connect a 720p, 1080p, 4K camera. The SDI input on the 610 and 620 are a 1080p 60fps connection. I would stay in a 30fps workflow with that many connections. Happy to walk you through the workflow or iron out any questions!