1. Get the required audio and picture materials: Select the image to be used as the video background and prepare the audio file to be added to the video.

2. Import material: use video editing software to import audio and background pictures. You can drag and drop images into the software's time track and import audio files into the software's audio track.

3. Adjust the duration: adjust the duration of audio and images to the desired video duration, which can be achieved by stretching or cutting images and audio.