Video Formats Is There a Best Video File Format? 10 Top Video Formats 5 Ways to Change Videos to Any Format Lossless Video Format: 7 Popular Formats and How to Choose All You Need To Know About MP4 To MOV Conversion Choosing Your Codec: AVC (H.264) vs. HEVC (H.265) Decoding the Future: x264 vs. x265 Mastering HEVC: The Future-Ready Video Compression Standard Pixel Perfect: H.264 VS H.265 Explained FFmpeg: Features, Use Cases, and Pros/Cons You Should Know VP9 vs. H.264 What Are Container File Formats (Media Containers)? VP8 vs VP9: 8 Key Differences and How to Choose What Is the M4A Format? | M4A vs. MP3 vs. WAV What Is MPEG-DASH? And MPEG-DASH vs. HLS What Are Video Subtitles? Common Formats and Best Practices H.264 Video Encoding: How It Works, Benefits, and 9 Best Practices QuickTime File Format (MOV): Apple’s MPEG-4 Predecessor MP4 Format (MPEG-4 Part 14): How It Works, Pros and Cons MKV Format: How It Works and How It Compares to MP4 AVI Format: Should You Still Use AVI? Windows Media Video (WMV) Format: What You Should Know HD Format: History of HD Video and 8 Formats You Should Know M4V Format: How It Works and MP4 vs. MPV FLV Format: Security Concerns and 5 Reasons to Switch to MP4 Top Six Web-Video Formats of 2024 What Is Video Transcoding? Video Frame Rates Explained Along With Tips for Picking the Right FPS A Primer on Video Codecs Open-Source and Royalty-Free AV1 Compresses Video Efficiently and Effectively Convert Video Formats: Six Essential Features of Video-Conversion Tools OGG Format: An In-Depth Look WebM Format: Basic Facts, Compatibility, and WebM vs. MP4

Video Frame Rates Explained Along With Tips for Picking the Right FPS

video frame rates

What is Frame Rate?

A frame rate or frame frequency, which is measured in frames per second (FPS), represents the number of individual frames presented to video viewers within a certain time. That rate is an important measurement in video production, requiring an understanding of how the human eye and brain perceive moving images. The frame rate at which you can distinguish individual stills projected as part of a series is lower than 12 FPS. Faster rates, such as 20 or higher, would cause images to appear as if they were moving.

Depending on the industry, standard frame rates vary. For example, cinema experts usually apply the following:

  • The standard 24 FPS for traditional films.
  • A refresh rate of 30 Hz., which depicts the number of times a monitor display is refreshed, for digital video.
  • Interlaced scanning, a technology that raises the frame rate without increasing the data rate while maintaining the resolution.

In addition to these industry standards, it’s important to note that the 24 FPS standard also extends to TV broadcasts, streaming video content, and even the capabilities of modern smartphones. This consistency across various devices and formats allows for a more unified viewing experience.

What is Video Resolution?

Video resolution refers to the dimensions of a video display in terms of pixel count. Essentially, it defines the number of pixels that make up the width and height of a video frame, and these pixels are the tiny dots that come together to form the visual content we see on our screens. The more pixels there are, the sharper and more detailed the image appears. This clarity and detail are particularly important when viewing high-action sequences or intricate scenes where fine details matter. High video resolution means that images remain clear and free from distortion even when significantly enlarged or reduced.

Video resolution can be broadly categorized into standard definition (SD) and high definition (HD). SD video resolution, which is below 1280×720 pixels, is becoming increasingly obsolete as technology advances. 

More commonly encountered resolutions today are 1920×1080 pixels (often referred to as Full HD) and 1366×768 pixels. The recent advent and popularity of 4K resolution, known as Ultra High Definition (UHD), and technologies like QLED (Quantum Dot Light Emitting Diode) illustrate the tech industry’s continuous push for more vibrant and sharper visuals.

From gaming and watching TV to photography and design work, a higher resolution enhances the viewing experience, making it more immersive and visually pleasing while also providing benefits for those with visual impairments or prolonged screen exposure by making text and images clearer and easier to read.

This post, part of a series on video formats, addresses the following topics:

How Frame Rate Relates to Resolution

Resolution depicts an image size in pixels. This scenario, for example—

  • HD: 1920 x 1080 or 4K: 3840 x 2160 pixels, which can achieve a 16-megapixel (MP) resolution in total
  • A 30 FPS refresh rate on the display

—means that you must update 16 million pixels in each of the 30 frames every second, and that it would take 0.033 second or 33.3 milliseconds to render a frame. The rendering time must never exceed the frame rate.

The resolution multiplied by the frame rate sets the system-required data rate. For example, an HDMI v1.3 supports delivery of 1,080p at 120 FPS, but a 4K resolution supports only up to 30 FPS.

Resolution and Frame Rate in the Gaming Industry

In video games, scene complexity might overwhelm the rendering task and impact the resolution because you must lower the resolution or frame rate to properly render the image. The rendering of the image is made easier by dropping the resolution from 16 MP to 4 MP, 2 MP, or half of the maximum resolution, thereby reducing the quality.

For gamers and PC users, understanding and managing frame rate is crucial for optimal gaming experience. To check the FPS in games on a PC, you can use tools like the Xbox Game Bar. By pressing the Windows Key + G, opening the Performance tab, and ensuring ‘fps – frames per second’ is checked under the Metrics section, users can monitor their game’s performance in real-time.

Improving frame rates in gaming can be achieved through hardware upgrades such as a more powerful graphics card, adding more RAM, or even by lowering the game’s resolution. These adjustments can significantly enhance the gaming experience, providing smoother motion and better overall performance.

Developers’ Preference

Since 30 FPS is most commonly available in displays (30 Hz.), many developers prioritize resolution over frame rate. They consider anything above 30 to be high end, which typically prevails in niche markets of gamers and graphics aficionados.

On the other hand, even though, under typical viewing conditions, you might notice the difference in resolution between 720p and 1080p, you definitely cannot see the difference in higher resolutions like 4K and 8K.

How You Should Choose the Best Frame Rate

The appropriate frame rate is determined by several factors, such as the video type and the delivery context.

When deciding on the best frame rate for your project, consider the specific requirements and desired visual impact. For standard video content, especially when aiming for a high resolution and a cinematic look, 4K at 30 FPS is often ideal. However, for capturing faster movements with smoother motion, such as in sports or action sequences, 4K at 60 FPS might be more appropriate. This consideration ensures that the chosen frame rate aligns with the content’s nature and the audience’s expectations.

Video Style

The frame rate of a video defines how realistic the video can be, significantly affecting the video’s style. Since humans perceive motion as being slightly blurry, the frame rate must mimic that blurriness for a touch of realism.

If the frame rate is too high, the “soap-opera effect” might apply to your video, displaying too many details and making the scenes seem unnatural. Conversely, if the frame rate is too low, the scenes might look choppy, leading to a rotten viewing experience.

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Motion-filled videos might benefit from a high frame rate. However, due to legacy electricity and television standards, 30 FPS is the standard for TV viewing.

Video Delivery

Before choosing a frame rate, consider the means of delivery for the video and the viewing device. Remember, not all broadcast TV and viewing devices support certain frame rates; do your research before pinning down the rate.

Online Performance

You can deliver video online with various frame rates. No specific standard—like the 24 FPS for cinema—applies. Instead, guidelines vary according to the platform. YouTube, for example, accepts all frame rates but recommends encoding and uploading at exactly the same rate at which you captured the video.

Motion Capture

Even though motion-heavy videos can benefit from a high frame rate, that does not mean that you must capture motions at that rate. Instead, capture them at a higher frame rate for more details and for greater flexibility in editing. An example is sports games, which are usually recorded at a high frame rate to enable a display of crisp and clear recaps in slow motion.

How Frame Rates Affect Video File Size

According to a study by Larry Jordan on 8K videos with the Apple ProRes codec, higher frame rates require more storage, bandwidth, and consumption—regardless of frame size. For example, for a video set to 24 FPS with storage at 100%, the table below shows how a higher frame rate increases the video’s file size, necessitating more storage capacity and bandwidth:

Frames Per Second (FPS) File-Size Increase Compared to 24 FPS
25 104%
30 125%
50 208%
60 250%

As shown above, 60 FPS requires 2.5 times the capacity and bandwidth of 24 FPS.

How Automation With Cloudinary Fosters Video Management

Cloudinary is great for optimizing and delivering video and adapting it to accommodate the user device and network speed. You can set up the appropriate parameters in several ways without having to learn the nitty-gritties of frame rates and the related lingo.

Let’s have a look at some of Cloudinary’s remarkable video-management capabilities.

Automatic Format Selection and Transcoding

By setting the f_auto parameter in video URLs, you direct Cloudinary to automatically select the best format for the user device with optimal bandwidth and speed. For example, Chrome users would receive an AV1-encoded WebM file; Safari users, an HEVC-encoded MP4 file.

If those formats do not work on the user device, Cloudinary delivers the video as an H.264-encoded MP4 file, which enjoys universal support.

Content-Aware Cropping

Cloudinary identifies the best, must-show sections of videos by analyzing those videos with advanced AI and machine-learning techniques, churning out intelligently downsized footage in any aspect ratio.

To take advantage of that capability, set crop mode to fill and gravity to auto. The cropped video then follows its most interesting content throughout the play session, retaining all the features you desired during the filming process and filling the screen—no matter the aspect ratio.

Cloudinary is a breeze to work with for nontechnical folks, too. Its rich, verbose Media Library uploads and manages videos from the UI, as well as offers numerous intuitive, versatile, and rich features. Do check them out.

QUICK TIPS
Kimberly Matenchuk
Cloudinary Logo Kimberly Matenchuk

In my experience, here are tips that can help you better optimize video frame rates for various applications:

  1. Match frame rate to content type For cinematic films, stick to 24 FPS for a classic, filmic look. For live broadcasts or sports, consider 60 FPS to capture smooth motion. Always align the frame rate with the nature of your content to maintain the intended viewer experience.
  2. Optimize for platform delivery Each platform has different frame rate standards. For example, YouTube supports various frame rates but performs best at the native capture rate. Understanding and optimizing for the specific platform ensures better playback quality and viewer satisfaction.
  3. Use higher frame rates for slow-motion effects Capture at higher frame rates (e.g., 120 FPS or 240 FPS) when planning to use slow-motion effects. This allows for smoother playback when slowed down, preserving detail and fluidity in motion sequences.
  4. Balance resolution and frame rate for streaming When streaming, especially in environments with limited bandwidth, it’s crucial to balance resolution and frame rate. Lowering the resolution while maintaining a higher frame rate can enhance the viewing experience by reducing buffering and latency.
  5. Consider frame rate implications on storage and processing Higher frame rates increase file size and require more storage and processing power. Plan accordingly by ensuring your infrastructure can handle the increased demands, especially when dealing with 4K or 8K content.
  6. Avoid the ‘soap-opera effect’ with narrative content Narrative films and dramas are best kept at 24 FPS or 30 FPS to avoid the ‘soap-opera effect,’ where the ultra-smooth motion at higher frame rates can make content look unnaturally sharp or overly realistic.
  7. Test across devices Before finalizing your frame rate, test the video on different devices (e.g., smartphones, tablets, and desktop monitors). Some devices handle frame rates differently, and testing ensures consistent playback quality across platforms.
  8. Utilize variable frame rates for complex scenes Consider using variable frame rates in complex scenes where certain segments benefit from higher frame rates, such as fast action sequences, while others can maintain a lower frame rate to save resources.
  9. Experiment with new standards like 120 FPS for immersive content As technology advances, 120 FPS is becoming more accessible, especially for VR and AR content. Experimenting with these higher frame rates can offer more immersive experiences, though they require careful consideration of hardware and software compatibility.
  10. Use content-aware adjustments Leverage AI-driven tools to automatically adjust frame rates based on content complexity. This allows for optimized performance without sacrificing quality, particularly useful in dynamic or resource-intensive environments.

These tips can significantly improve the quality, performance, and viewer experience of your video content, ensuring that your frame rate choices are aligned with both technical requirements and creative intentions.

Last updated: Sep 15, 2024