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Loss of resolution when outputting to Zoom
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Joined: 3/22/2020(UTC) Posts: 50  Location: River Hills Thanks: 3 times
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I'm feeding 1080p NDI video to vMix and outputting it to Zoom where it is noticeably appearing in a lower resolution. Here's our setup: The input camera is a Mevo Start running 1080p at 15Mbps. It is sending NDI via wired Ethernet. In vMix Settings for Output, we are configured for 1920x1080 (which matches the NDI camera). In the vMix Program window, everything looks crystal clear. I'm using vMix External to provide a direct video feed to Zoom (i.e., I'm able to directly select the vMix video in the Zoom video camera selection). In vMix External Settings we are configured for 1920x1080. In other words, I believe I've done everything possible in vMix to preserve 1080p resolution in what gets sent to Zoom. Yet, in Zoom the video resolution is noticeably degraded for the vMix participant. I also tried a second approach where I enabled vMix NDI output and had Zoom input it by way of NDI Virtual Input, and there was no difference than the direct External method. Any ideas on what would cause such a marked degradation of resolution in Zoom? I've tried with and without the HD option in Zoom video settings. We have a regular Zoom business account; should I be down-scaling the video in vMix (e.g., to 1280x720) before I send it to Zoom?
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Joined: 10/24/2020(UTC) Posts: 21 Location: CA Thanks: 10 times
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Are you using Zoom Meeting or Webinar? Zoom only goes to 720p (@ 1 mbps iirc) except for enterprise accounts that have 1080p enabled on the backend. Also, Zoom only does 720p for two people. Once you add a third it drops to SD. Good info here - https://streamgeeks.us/h...r-video-quality-in-zoom/
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Joined: 7/28/2019(UTC) Posts: 351 Location: Santa Rosa Thanks: 1 times
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Is the degradation on a remote Zoom computer, or while viewing you own camera on the local computer? I use Zoom via NDI and the local quality is always prestine, but Zoom compresses it to complete garbage.
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Joined: 3/22/2020(UTC) Posts: 50 Location: River Hills Thanks: 3 times
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We are doing Zoom meetings. We have a business account with the 1080p option enabled. We've selected Enable Group HD. On the Zoom computer that's receiving the vMix video feed (via direct vMix External), the HD option is selected in Video Settings. When this computer becomes the Active Speaker, our hope is all would see it as 1080p, including the outbound RTMP live stream. Alas, such is not the case.
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Joined: 5/26/2021(UTC) Posts: 1 Location: New York
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I am using Wirecast's virtual camera for IT training in Zoom. include screenshots explaining the workflow and showing the quality loss. other participants but your Wirecast output quality will be vastly improved. expressHR
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Joined: 12/2/2021(UTC) Posts: 1  Location: Florianopolis
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Originally Posted by: Bob Brazner  I'm feeding 1080p NDI video to vMix and outputting it to Zoom where it is noticeably appearing in a lower resolution. Here's our setup: The input camera is a Mevo Start running 1080p at 15Mbps. It is sending NDI via wired Ethernet. In vMix Settings for Output, we are configured for 1920x1080 (which matches the NDI camera). In the vMix Program window, everything looks crystal clear. I'm using vMix External to provide a direct video feed to Zoom (i.e., I'm able to directly select the vMix video in the Zoom video camera selection). In vMix External Settings we are configured for 1920x1080. In other words, I believe I've done everything possible in vMix to preserve 1080p resolution in what gets sent to Zoom. Yet, in Zoom the video resolution is noticeably degraded for the vMix participant. I also tried a second approach where I enabled vMix NDI output and had Zoom input it by way of NDI Virtual Input, and there was no difference than the direct External method. Any ideas on what would cause such a marked degradation of resolution in Zoom? I've tried with and without the HD option in Zoom video settings. We have a regular Zoom business account; should I be down-scaling the video in vMix (e.g., to 1280x720) before I send it to Zoom? hi did find a solution for this? this is also my problem
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Joined: 3/22/2020(UTC) Posts: 50 Location: River Hills Thanks: 3 times
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I'm afraid I don't have a good answer for @jerome13003. When I originally posted, we were feeding vMix to Zoom, and then using Zoom to RTMP upstream to BoxCast and from there to YouTube, Facebook and the BoxCast player on our website. So, Zoom resolution was critically important to us at that time. Now, we use vMix to do our RTMP upstreaming to BoxCast at 1080p and we are successful in that endeavor to reach our primary audience. We continue to feed 1080p from vMix to Zoom, but frankly we haven't spent any time trying to improve the resolution for that audience.
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@jerome13003, did you read yimmyo's post?
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