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Thread: Laptop NDI issues

  1. #1
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    Laptop NDI issues

    Hi,

    I have been having a lot of trouble with NDI when I connect up my ASUS ROG i7 Laptop. I have the laptop connected to a simple Ubquitii Edgeswitch 8 and I also for test purposes have an i7 Desktop connected to the switch. I am playing 2 video files using VMix on both. I have run NDI analysis and this is the results.

    1: name="ASUS-VIDEO-LAPTOP (vMix - Output 1)"
    host="192.168.79.38"
    port="5961"
    type="NDI|HX"
    2: name="BUSINESS (vMix - Output 1)"
    host="192.168.79.39"
    port="5961"
    type="NDI"

    As you can see the Laptop output is stating it is a NDI/HX source but how is this possible. Below are the source readings for both NDI streams:
    Laptop Stream
    10:20:15.723: Video receiver creation succeeded.
    10:20:15.723: Audio receiver creation succeeded.
    10:20:23.730: Video connection opened.
    10:20:23.733: Audio connection opened.
    10:20:23.737: Tally program=false preview=true
    10:20:23.737: Product, Long name=vMix 4K - 22.0.0.66 x64
    10:20:23.737: Product, Short name=vMix
    10:20:23.738: Product, Model=4K
    10:20:23.738: Product, Manufacturer=vMix
    10:20:23.738: Product, Version=22.0.0.66
    10:20:23.739: Audio format changed. 48000Hz, 2 channels.
    10:20:23.763: Video format changed. 1920x1080, progressive, aspect ratio=1.78, frame-rate=50.00, no alpha channel.
    10:20:25.739: Video data rate (MBps). Avg=129.23
    10:20:25.739: Video size (kB). Min=277.90 Avg=310.10 +/- 23.93 Max=359.46
    10:20:25.740: Video recv (mS). Min=10.22 Avg=20.00 +/- 3.91 Max=30.93
    10:20:25.740: Video send (mS). Min=17.77 Avg=20.00 +/- 0.87 Max=21.98
    10:20:25.741: Audio data rate (MBps). Avg=0.00
    10:20:25.741: Audio size (kB). Min=0.00 Avg=0.00 +/- 0.00 Max=0.00
    10:20:25.741: Audio recv (mS). Min=12.95 Avg=20.01 +/- 2.86 Max=26.99
    10:20:25.742: Audio send (mS). Min=19.45 Avg=20.00 +/- 0.28 Max=20.99
    10:20:25.744: Video receiver destroyed.
    10:20:25.761: Audio receiver destroyed.

    Desktop Stream
    10:21:31.626: Video receiver creation succeeded.
    10:21:31.626: Audio receiver creation succeeded.
    10:21:39.630: Video connection opened.
    10:21:39.631: Audio connection opened.
    10:21:39.632: Product, Long name=vMix 4K - 22.0.0.60 x64
    10:21:39.632: Product, Short name=vMix
    10:21:39.633: Product, Model=4K
    10:21:39.633: Product, Manufacturer=vMix
    10:21:39.635: Product, Version=22.0.0.60
    10:21:39.643: Audio format changed. 48000Hz, 2 channels.
    10:21:40.670: Video format changed. 1920x1080, progressive, aspect ratio=1.78, frame-rate=50.00, no alpha channel.
    10:21:41.642: Video data rate (MBps). Avg=99.22
    10:21:41.642: Video size (kB). Min=232.73 Avg=245.77 +/- 8.79 Max=277.08
    10:21:41.643: Video recv (mS). Min=16.04 Avg=20.01 +/- 1.92 Max=24.64
    10:21:41.644: Video send (mS). Min=16.32 Avg=20.02 +/- 1.85 Max=23.62
    10:21:41.644: Audio data rate (MBps). Avg=1.54
    10:21:41.644: Audio size (kB). Min=3.85 Avg=3.85 +/- 0.00 Max=3.85
    10:21:41.644: Audio recv (mS). Min=18.63 Avg=20.00 +/- 0.54 Max=21.44
    10:21:41.645: Audio send (mS). Min=18.79 Avg=20.00 +/- 0.51 Max=21.18
    10:21:41.646: Video receiver destroyed.
    10:21:41.653: Audio receiver destroyed.

    Can anyone shed any light on this. The problems I have is as soon as I plug the laptop into the workflow NDI traffic between sources on my network breakdown, lose connection or just have framehold issues. The laptop is using a Thunderbolt 3 dock with a 1Gb Lan socket.

  2. #2
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    Encoding NDI|HX is only done using dedicated hardware. So NDI Analysis is incorrect in the assertion that the stream created by vMix (or OBS) is NDI|HX.

    So the problem must be something else. It's NOT an NDI|HX stream.

    That said, if NDI Analysis is misreading the stream it's possible that it shares some code with the Tricaster Mini. There could be a bug impacting both systems.

    Note: the reference to the Tricaster Mini comes from a post in the vMix NDI forum: https://forums.vmix.com/posts/t20159...sending-NDI-HX
    Last edited by mjgraves; 07-31-2019 at 02:51 PM.

  3. #3
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    Interesting that you added the idea that the Tricaster and NDI Analysis might be sharing the same code and it effecting the Tricaster. I have mentioned in a few postings the issues I have had integrating this laptop running VMix and my Tricaster Mini. I use my Tricaster for my main production but I wanted to have a laptop running VMix so I can record inputs seperately, add captions from GT Designer and also to stream to Facebook. Unfortunately whenever I have tried to use Vmix and the Tricaster together my production has slowly ground to a halt with network issues. I have had better success by using OBS on the Laptop but that limits my ability to record and also I can't integrate VMix captions into my production.

  4. #4
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    It's extremely common for a company to use a shared code-base across multiple products. That way any changes to fundamental bits of code are uniformly implemented across the product range.

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