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anson  
#1 Posted : Tuesday, January 14, 2020 8:55:35 PM(UTC)
anson

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Hi,

I have 2 PCs running vMix, One output NDI video, another one received it. They are both connected to the same cisco 3750E switch. The problem is in the receiving end, source dropped value keeps increased and the NDI video is a bit lagged. Both PC's CPU, memory and network usage are low. Do you have any idea where should I look for to find the root cause? what is the minimum requirement for NDI?

Thanks
anson  
#2 Posted : Wednesday, January 15, 2020 6:10:38 PM(UTC)
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my network guy confirm that there is no packet drop in the switch. The PC config is : CPU i7-7700, 16GB ram, windows 10 64-bit, NVIDIA geForce GTX 1060 3GB. Still can't find out what went wrong.
doggy  
#3 Posted : Wednesday, January 15, 2020 6:37:22 PM(UTC)
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any file transfers happening at times by any chance ?
admin  
#4 Posted : Wednesday, January 15, 2020 8:43:48 PM(UTC)
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Any switch is unlikely to drop packets. At first glance it sounds like one or both of the ends are only connected at 100mbit, due to cabling or connection issues.
This is actually surprisingly common so it is worth double checking even if you are sure both are gigabit.

The easiest way is to run PowerShell in Windows and run this command:

Get-NetAdapter | where Status -eq "Up" | select InterfaceDescription, LinkSpeed
anson  
#5 Posted : Wednesday, January 15, 2020 8:49:38 PM(UTC)
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Originally Posted by: doggy Go to Quoted Post
any file transfers happening at times by any chance ?


No, that switch is dedicated for NDI.
anson  
#6 Posted : Wednesday, January 15, 2020 8:53:18 PM(UTC)
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Originally Posted by: admin Go to Quoted Post
Any switch is unlikely to drop packets. At first glance it sounds like one or both of the ends are only connected at 100mbit, due to cabling or connection issues.
This is actually surprisingly common so it is worth double checking even if you are sure both are gigabit.

The easiest way is to run PowerShell in Windows and run this command:

Get-NetAdapter | where Status -eq "Up" | select InterfaceDescription, LinkSpeed


Both ends are 1Gb connection.

I have reviewed NewTek website for the requirement of NDI. Those PCs fulfill all requirements. Still wondering what goes wrong.
admin  
#7 Posted : Wednesday, January 15, 2020 10:34:39 PM(UTC)
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Did you run the powershell to double check? While the cable, network cards and switches
can appear to be gigabit, sometimes issues will cause them to connect at 100mbps, so you will need to double check to be sure.
anson  
#8 Posted : Thursday, January 16, 2020 2:47:31 AM(UTC)
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Originally Posted by: admin Go to Quoted Post
Did you run the powershell to double check? While the cable, network cards and switches
can appear to be gigabit, sometimes issues will cause them to connect at 100mbps, so you will need to double check to be sure.


Below is output of the both ends

Get-NetAdapter | where Status -eq "Up" | select InterfaceDescription, LinkSpeed

InterfaceDescription LinkSpeed
-------------------- ---------
Intel(R) Ethernet Connection (5) I219-LM 1 Gbps


Get-NetAdapter | where Status -eq "Up" | select InterfaceDescription, LinkSpeed

InterfaceDescription LinkSpeed
-------------------- ---------
Broadcom NetXtreme Gigabit Ethernet 1 Gbps

I have updated vMix to version 23. But still no luck.
admin  
#9 Posted : Thursday, January 16, 2020 4:54:21 AM(UTC)
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I would suggest dropping us an email and send us a support report in vMix while the issue occurs:
https://www.vmix.com/contact-us.aspx
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