NDI GPU decoding

I own 2 iMac Pros. I want to use one for creation and the other one only to stream to Restream with Wirecast.

I use the NDI to bring my creation to the computer with Wirecast and works great, but I do not know what is the  GPU Decoding supposed to do? would it be better to activate it?

My streaming/wirecast machine specs are:


iOS Catalina

3,2 GHz 8-Core Intel Xeon W

Radeon Pro Vega 56 8 GB

32 GB 2666 MHz DDR4


What would be, with that setup, the highest quality output you'd chose for Youtube at 1080p30:

x.264 H.264 or Apple H.264?


Thanks a lot

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  • In some cases NDI GPU decoding can lower the CPU as it moves some decoding to the GPU. The impact varies from negligible to significant depending on the Mac and the GPU so test and see if it has an impact if you're having high (over 60%) CPU use.

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