04-23-2020 10:18 AM
I'm experiencing the same and have yet to find any good information. Any update? I was hoping you'd have found some useful and knowledgable responses, but I'm disappointed to see the opposite.
05-05-2020 01:21 PM
This issue is simple, the resolution of the live view over USB is very low, this has become more evident now that Canon has put out EOS webcam utility, which presumably uses a similar live view resolution. From this page about a new special firmware for stop motion, it seems that the EOS R's live view normal resolution is 960 x 640 which is very low for manual focusing on a big screen. It may be a limitation of the hardware of these cameras, because with that firmware, increasing the resolution to 1920x1280 on the EOS R kills the HDMI output.
With the webcam utility, using an EOS R over USB 3.1 Gen 1 (5Gbps), the test here indicates that the stream resolution is just 576p (1024 x 576), the fps capped at 30 fps, and throughput about 15-16 megabytes per second. This is very well within USB 2.0 capabilities as well.
06-15-2020 09:50 AM
I can confirm my video on my GX7 Mark III is 1024x576 from the Beta webcam utility. I'm not happy at all with the quality. This beta webcam software allows you to use your high dollar camera like a $100 web cam. No thanks. My Logitech c922 looks better at 1920x1080.
Come on Canon... Sony is whooping you on this front.