I've tested AV1 encoding in vMix 27 using an Nvidia RTX 4070ti with exciting results. Watch this YouTube video for details .

But the RTX 4000 series GPUs are out of reach ($$$) for many folks especially some that could really benefit with outstanding video at lower bandwidth (churches, school sports venues, rural livestreamers, portable streaming systems with slow bandwidth and more).

So, I have ordered an Intel ARC GPU ($94) with an AV1 encoder. But the question arises... Can that new card peacefully coexist with my RTX 4070ti? Will vMix care? Will vMix/PC performance suffer like it would with two Nvidia GPUs?

I'll be testing this for sure but I wanted to hear your thoughts.

- Tom

Also interested in the result. It feels like it should be possible but might depend on how vMix detects what hardware encoders are available on the machine - and if they are happy to move the frames between devices.

I just did a test on an Nvidia machine without Arc and vMix tried to use av1_nvenc to encode in ffmpeg, so the Nvidia specific codec. V27 release notes say AV1 on Arc is supported but that might not be tried if you have Nvidia configured as your main GPU in vMix.

With the next gen of Intel processors rumoured to have hardware accelerated AV1 encoding I could those, plus a 2/3000 series card, being popular setup if supported.


(If vMix won't use the Arc encoder, you could try running OBS on the same machine, configured to run using the Arc card, and use that to take NDI from vMix and stream it. You may aulo be able to run two instances of vMix, one on each gpu, but I think the GPU config would be shared.)

Unfortunately, it is unlikely vMix will ever support running two GPUs in the system at the same time, as the potential for poor performance and conflicts is too high.

When selecting the hardware encoder, vMix will search for the encoder available on the same GPU used by the rest of vMix.

The GeForce 4060 can already be found for under $300 USD on Amazon and NewEgg and no doubt cheaper options will start to become available in the near future
(such as the long rumoured 4050)

Finally, HEVC is an option to achieve almost the same quality as AV1 when streaming to YouTube and is available right now in vMix 27 on GeForce 2000 series or higher.

Regards,

Martin
vMix