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vMix NDI output bandwidth.
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g7pfv  
#1 Posted : Friday, January 13, 2023 7:10:46 AM(UTC)
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I'm running a few NDI HX devices 1080p at around 7.5kbps.

When I enable vMix NDI output this ramps the bandwith usage up to 200+ kbps, is there any way to define vMix NDI out bandwidth at a reduced level or output as NDI HX rather than full NDI ?

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paco3346  
#2 Posted : Friday, January 13, 2023 7:19:16 AM(UTC)
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Short answer: No, NDI HX is licensed which is why a lot of software doesn't offer it out of the box.


Long answer: Some clients support 'low bandwidth' mode. This may help.

NDI HX isn't necessarily a good use case for vMix. On a camera you can add a hardware chip to do the compression in real time. On vMix your GPU is already busy doing other stuff and you probably don't want the added latency of software compression. I'm a believer in allowing software users to shoot themselves in the foot and not excluding features because you're trying to protect the user. Personally, I'd never use HX but I'm also not opposed to it existing for people such as yourself.
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thanks 1 user thanked paco3346 for this useful post.
g7pfv on 1/13/2023(UTC)
g7pfv  
#3 Posted : Friday, January 13, 2023 8:26:45 AM(UTC)
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Thank you - for this particular application low bandwidth mode does the trick perfectly (no cables can be run so its 4 NDI HX sources over a dedicated wifi link) tested and zero drops or glitches with bandwith usage reduced 50%.
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gamerxp  
#4 Posted : Tuesday, January 31, 2023 2:54:39 PM(UTC)
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NDI have a tool pack called "NDI Tools" which bundle with Bridge that allow you to transcode normal NDI to NDI HX with Nvidia GPUs. Keep in mind that Geforce cards can do up to 3 encoding.

ndi.tv/tools

From my experience. Normal NDI use SpeedHQ under the hood and NDI HX use H264/H265.
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