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Slightly off topic, quality of streamed content on Zoom via NDI
Rank: Advanced Member
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Joined: 7/28/2019(UTC) Posts: 351  Location: Santa Rosa Thanks: 1 times
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I'm usually am successfull are convincing clients to stream events, but this one want to go through Zoom Webinar.
I know this is a Zoom issue with real time communications, but I was wonndering if someone had any tricks up their sleeve to improve quality at all.
Our NDI feed to Zoom is crystal clear, becomes absolute garbage once sent to Zoom, HD is enabled. Is this everyone's else's experience?
The client is used to seeing shared content which I know is clearer, but mostly because Zoom prioritizes this and drops frame rate, I don't think this is an option here?
Thanks for any input.
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Rank: Advanced Member
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Joined: 7/11/2015(UTC)
Posts: 354
Location: NJ
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Keep in mind that when you are viewing your own video feed in zoom, that is a local representation, not what the audience sees. For example, if you have mirror turned on, you see a mirrored image, and the audience does not.
I don’t know about the current default for webinars, but in a regular Zoom meeting, since early last year, in basic and Pro zoom accounts, as soon as a third participant joins, the resolution drops to 360p for video.
I know that HD can be enabled in large webinars, but that requires a request to .zoom support.
HD is a available in Business and Enterprise Zoom accounts, but again, it has to be requested from support.
I hope this helps.
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Rank: Newbie
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Joined: 7/28/2020(UTC) Posts: 2 
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For Zoom and Teams I utilise screen share rather than a virtual Webcam for any PowerPoint / VT content. I have found that Zoom and Teams treats the Virtual webcam as a webcam and allocates it an adaptive bitrate. Screen share, however, is treated differently. For Screen share I utilise NDI Monitor full screen on a dedicated display on the share computer. Hope this helps?
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Rank: Advanced Member
Groups: Registered
Joined: 7/28/2019(UTC) Posts: 351 Location: Santa Rosa Thanks: 1 times
Was thanked: 53 time(s) in 51 post(s)
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We ended up setting Group HD in the admin panel which gave us 720P (much better), but the client had a business account, so we had them request 1080P via support, and it's looked very good, close to streaming quality at 8 Mbps.
Thanks for the tips.
On the screen sharing option, I was under the impression that this caused the frame rate to drop drastically?
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Rank: Newbie
Groups: Registered
Joined: 7/28/2020(UTC) Posts: 2
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Never had a problem with frame rate, have had issues with virtual webcams on various platforms. Screen share allocates more resource and has always been reliable for me. Also stereo audio is available in teams with screen share.
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