backgroundImage property

String? backgroundImage
getter/setter pair

Field description: background image of the mixed video image.

Recommended value: default value: null, indicating not to set the background image

Note: you need to upload the background image in "Application Management" > "Function Configuration" > "Material Management" in the console in advance.

       After the upload is successful, you can get the corresponding "image ID". Then, you need to convert it into a string and set it as `backgroundImage`.

       For example, if the "image ID" is 63, you can set `backgroundImage = "63"`;

Implementation

String? backgroundImage;