RCRTCVideoEventCode

未知错误

摄像头资源被其他应用抢占

摄像头资源恢复

对应Camera.ErrorCallback#CAMERA_ERROR_UNKNOWN 目前应用退后台后，摄像头自动停止采集这种场景Camera会报CAMERA_ERROR_UNKNOWN，应通知开发者

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Returns an array containing the constants of this enum type, in the order they're declared. This method may be used to iterate over the constants.