How is frame rate defined in video production?

Frame rate in video production refers to the number of individual frames or images that are displayed in one second of video playback. This measurement is crucial as it directly affects the smoothness and quality of motion in the video. A higher frame rate results in smoother motion, making it particularly important for fast-moving scenes in action films or sports broadcasts, where clarity and fluidity are essential. Common frame rates include 24 frames per second (fps) for cinema, 30 fps for television, and even higher rates like 60 fps or 120 fps for specific applications, particularly in gaming and high-definition video.

In contrast, the other options relate to different aspects of video production. The total number of pixels in a video pertains to resolution, which affects the clarity and detail of the image, but not the motion portrayal. The size of each video file is determined by factors such as resolution, compression, and duration, rather than frame rate alone. Lastly, the duration of the entire video is simply the length of time the video plays and does not provide insight into the motion quality or fluidity of the images, which is the essence of frame rate.