1: You can achieve the conversion between internal and external shooting through the settings function in the Douyin APP. After the update, the Douyin APP has added a new "shooting settings" function, which can achieve the conversion between internal and external shooting. In the updated version of the Douyin APP, a new "shooting settings" function has been added, which can be used to convert the camera between internal and external shooting. First, after entering the Douyin APP, find the "+" button to enter the shooting page, and then find the "settings" button at the bottom of the page. After clicking to enter, you can see the camera setting options, including video clarity, aspect ratio, and lens reversal. Lens reversal supports internal and external conversion, where "built-in" represents the front camera and "external" represents the rear camera. Users can convert between internal and external shooting as needed.