What is FPS? Its meaning and application in professional filmmaking.

In filmmaking and editing, FPS (frames per second) is not just a dry technical number, but a crucial factor in determining how movement appears on screen. From the smoothness of the image and the rhythm of movement to the overall cinematic style, everything is directly influenced by FPS. So what is FPS? Let's explore this in detail in the article below.

What is FPS?

When watching a video or movie, the smoothness or unnaturalness of the image, whether it feels cinematic or realistic, is influenced by a factor called frame rate. Simply put, frame rate is the number of static frames recorded or displayed per second during video playback. This parameter indicates how many consecutive images make up one second of moving footage. The higher the frame rate, the smoother the motion; a lower frame rate creates a more cinematic and natural feel.

FPS is a unit of measurement for the frame rate when recording video. 

Frame rate is measured in FPS (Frames Per Second). FPS indicates how many frames are recorded in one second; for example, 24 FPS means 24 frames are recorded in one second. A higher FPS results in smoother motion, while a lower FPS creates a more cinematic and natural feel for the viewer. This is a crucial factor in how motion is reproduced, and it's not solely dependent on a high-quality camera or high resolution.

Common FPS levels in video recording

In filmmaking, choosing the right FPS (frames per second) directly impacts the smoothness of motion and the visual style of the video. Each FPS level has its own characteristics and is used for different purposes in image production.

Different frame rates (FPS) make motion in recorded video feel different. 

Specifically:

• 16 FPSThis speed is quite slow and is hardly used anymore today. However, if you watch old black and white films from the past, you can still come across these scenes, usually silent videos shot at this speed. 
• 24 FPS: Cinematic frame rate, creating a natural, realistic, and emotionally rich sense of movement, similar to experiencing it with the naked eye. This FPS level is commonly used for theatrical films, TV commercials, short films, etc.
• 25 FPS: This index represents the standard television broadcast speed in some European and Asian countries, commonly used for filming TV programs and documentaries.
• 30 FPSThis is one of the common frame rates for online videos, live streams, sports programs, etc., generally videos with fast-moving scenes. This frame rate ensures that continuous movement is captured clearly and accurately, with high realism. Additionally, videos shot with a phone can also be set to 30FPS when recording action videos or live streams for better quality.
• 60 FPSSimilar to 30 FPS, 50-60 FPS also produces smoother motion effects, suitable for sports, events, and scenes with a lot of movement. However, this frame rate is more suitable if the video needs to be broadcast on large screens, TVs, or outdoor billboards. Videos requiring slow-motion effects are also shot at this speed, then adjusted to 30 FPS or 24 FPS in post-production.
• 120 FPS or higherThis frame rate is primarily used for slow-motion filming, helping to smoothly slow down movement without blurring, ensuring a satisfying visual experience for viewers. This frame rate is often used in TV commercials, such as hair removal scenes in shampoo advertisements or action and chase scenes in movies, etc.

The significance of FPS in filmmaking.

FPS (frames per second) is not simply a technical specification, but a direct factor determining video quality through how movement and emotion are conveyed to the viewer. Choosing the right FPS makes images smoother, more natural, and more realistic, as if you were experiencing them firsthand. FPS significantly affects the rhythm of movement, visual sensation, and cinematic quality of the footage, thereby impacting the overall viewing experience.

FPS directly affects the smoothness, naturalness, and realism of a video. 

Furthermore, FPS plays a crucial role in post-production, especially in slow motion, controlling fast movements, and optimizing video for different distribution platforms. Therefore, in professional filmmaking, FPS is not just a number set on the camera, but a visual storytelling tool that helps cinematographers master the style and emotion of their work.

In general, anyone wanting to learn about professional filmmaking needs to thoroughly understand FPS (frames per second) parameters to apply them appropriately to different situations and purposes, ensuring the best video quality.

FPS applications in professional filmmaking.

In filmmaking, FPS (frames per second) is used as a tool to control motion, emotion, and visual style. Depending on the production purpose, FPS will be applied in different ways to achieve optimal visual results.

• 24 FPS is commonly used for feature films, short films, TV commercials, and corporate videos to create a natural, emotionally rich, and cinematic feel; this FPS level is suitable for playback in movie theaters, brand websites, and professional video platforms.
• 25 FPS is primarily used in television programs, documentaries, and news broadcasts to ensure stability and compatibility with broadcast standards; this FPS level is suitable for television systems in Vietnam and Europe.
• 30 FPS is commonly used for promotional videos, marketing videos, vlogs, and other creative digital content to deliver clear, easy-to-view images; suitable for release on online platforms such as YouTube, Facebook, and websites.
• 50–60 FPS is used for videos with a lot of movement such as sports, events, action vlogs, or hand-cranking videos, with the aim of increasing smoothness and reducing stuttering; this FPS level is suitable for YouTube, social media, and large screens.
• 120 FPS or higher is primarily used for slow-motion filming in commercials, art films, and fast-moving scenes, aiming to highlight detail and visual emotion; it is often post-produced and released on digital platforms or in professional presentation projects.

Some things to note when setting FPS.

In fact, not only professional video cameras but also current smartphones allow you to set this frame rate when recording video. However, setting a higher FPS isn't always better; you need to carefully consider your needs, the purpose of the shoot, the equipment, the lighting, and whether or not you plan on post-production.

FPS settings should depend on your needs and purpose; higher isn't always better. 

Some things to keep in mind when setting FPS for professional video recording.

• Clearly define the purpose of the filming from the start: Before setting the FPS, you need to determine the purpose of the video, such as a movie, commercial, vlog, or social media. Each purpose will suit a different FPS level, avoiding shooting at a high FPS if it's not used.
• Higher FPS isn't always better: High FPS (frames per second) results in smoother footage but also requires more light and creates larger files. In many cases, shooting at 24 or 30 FPS properly will produce a more beautiful and natural image than trying to shoot at a higher FPS.
• Combine FPS with a reasonable shutter speed: FPS needs to be paired with a suitable shutter speed (usually double the FPS) for motion to remain natural. Setting a high FPS but using the wrong shutter speed will result in harsh images or a lack of motion blur.
• Consider the lighting conditions and equipment: For devices that aren't very powerful or for shooting in low-light environments, a low FPS (frames per second) is preferable to ensure image quality and minimize noise and loss of detail.
• Synchronize FPS throughout the recording process: Arbitrarily changing the FPS between scenes can make editing difficult. It's best to agree on a consistent FPS from the start for easier post-production and a seamless visual experience.
• Note the release platform: Each platform has a different FPS standard, such as television, social media, or movie theaters. Setting the appropriate FPS right from the recording stage will help ensure the video displays correctly and minimize errors when exporting the file.

In filmmaking practice, FPS (frames per second) isn't just a parameter to "choose and get it over with," but a decision that impacts the entire process from shooting to post-production. FPS doesn't determine whether a video is good or bad, but it determines how movement is perceived. When used correctly, FPS becomes the foundation for clearer, more emotional, and consistent visuals.