pure black image is shown regularly in the camera image stream

[jewes]

In some cases, pure black image is shown regularly in the camera image stream(like once a second, a pure black image is shown followed by correct camera image, and so on....)

[mjxu96]

This is a known issue when streaming images on Windows or streaming very quickly on Linux. I am working on a fix.

[mjxu96]

This should be fixed in https://github.com/mjxu96/carlaviz/pull/62