Maintaining resolution when sending Pearl-2 video to Zoom


#1

We’re running an event where we need to send computer video to Zoom via screen-capture on a Pearl-2 (signal flow computer -> Pearl -> Zoom running on a second computer). The computer video looks good in the Pearl but is getting unacceptably fuzzy in Zoom. I know Zoom does very heavy compression, but I’m wondering if there’s anything we could be doing to optimize the Pearl’s output to minimize the degradation. Any ideas?


#2

Your channel encoding settings in Pearl play a large part in the output quality. I’d recommend setting a static frame size, as well as selecting a larger bitrate if the file sizes for recordings is not an issue.
As an example, if your channel frame size is set to 1920 X 1080, try setting a static video bitrate bitrate of 10000 kbps. This will result in less compression for the video encoded channel.
Zoom does have a 1280 X 720 frame size limit so there will be some downscaling once it’s captured into Zoom, however the quality from Pearl should be higher with a larger bitrate.


#3

Thanks. Since Zoom sends 720, would there be any benefit to downscaling the video in the pearl to minimize the compression and scaling Zoom is doing?


#4

You could definitely aim for a 1:1 to avoid downscaling which may improve the quality by not having to downscale, but the issue is typically more prevalent when the attempt is to upscale