GoScan | GoScan是采用Golang语言编写的一款分布式综合资产管理系统，适合红队、SRC等使用

If scanning is already working, you're nearly there. Ensuring the video preview is visible basically requires stepping through the layers of your application and confirming that the layer isn't obscuring the preview.

Start by inspecting the DOM of your app while it's running on the device. Try setting a background of none transparent on each element covering the view, including the body and html elements. In almost all cases, you'll find a rogue container with a white background somewhere in the layers of your app.

If you're entirely convinced the entire web view is transparent (note: this is very unusual), you'll need to inspect the native layers of your app to determine if another plugin or configuration setting is interfering with visibility. Instructions for this step would be very platform specific, so it's best to consult documentation/forums for the platform in question.