If you want to broadcast live on a green screen, you usually broadcast live on OBS and then edit it on a green screen. However, Tik Tok, Aote Express and Taobao do not support OBS live broadcast. We can use the live broadcast assistant of the small gourd e-commerce, which uses OBS for live broadcast. After the software is done, we still need to make some hardware preparations. First of all, we need to do some preparatory work on the hardware equipment. First of all, we must prepare the "green curtain". The so-called green curtains are solid color curtains, not necessarily green, but definitely solid color. With the green screen as the background, the lighting needs to be uniform. Try not to have wrinkles and shadows, otherwise it will affect the matting effect. In addition, the anchor and the displayed goods cannot have the same or similar color as the background green screen, otherwise the live broadcast effect will be affected after the matting. After the hardware facilities are ready, you can start the green screen live broadcast. First, add a camera to the OBS to take an anchor picture, and then right-click the source video capture device. Select a filter in the menu, click the+sign under the effect filter, and then select the chroma key in the pop-up menu. In the color key setting, we can select the color to be cut in the key color type. If there is no "green screen" color in the drop-down menu of the key color type, we can choose the last customization and click to select the color. In the pop-up window, we can choose the color we want to cut. If we don't know what color to choose, we can use the color selector to get the color in the camera directly on the screen. We can further optimize the matting effect by adjusting the similarity, smoothness and light leakage reduction of the main color. After setting, click Close, and you can see the effect in the preview page of OBS. At this time, you can add the background of the live broadcast room. If there is only one picture as the background, we can add the picture source. After clicking, we can find the prepared background picture and add it. If we need more than one picture as the background, we need to add an image slide. It is worth noting that when setting the slide show, we can change the slide show mode to manual mode, so that we can manually change the hotkey setting of the live broadcast background through hotkeys. We can find the image slide show under OBS Settings-Hotkeys, and set the hotkeys of each function. The last item in the Image Slide Show Properties window is to add an image file. Click the+sign to add an image file or directory. After adding multiple images, we can change the display order of the images by dragging, that is, after adding the display order, we can see the corresponding effect in the OBS preview window.