Video Resolution – The Ultimate Guide to Display Resolution for Broadcasters

“Resolution” is a term that is thrown around a lot in the video streaming world. Consumers often associate “high-resolution” or “high-definition” with stellar video quality, and in a sense, they are right.

However, video resolution is more than that. It is actually an important measurement in online broadcasting that can be manipulated to optimize the viewers’ experience.

In this post, we’re going to discuss everything you need to know about video resolution and related technology. We’ll start by defining video resolution and two similar measures before we take a close look at common video resolutions. We will also compare SD vs. HD and describe the importance of each.

To wrap things up, we will talk about how to change a video resolution and take a look at some suggested encoder settings to yield the best results.

Table of Contents:

• What is Video Resolution?
• Measurements Related to Video Resolution
• Common Video Resolutions
• HD vs. SD
• What is the Best Video Resolution?
• How to Check Video Resolution
• Multi-Bitrate Streaming: Different Qualities for Different Viewers
• YouTube Video Resolution and YouTube Video Dimensions
• How to Change a Video’s Display Resolution
• Conclusion

What is Video Resolution?

Video resolution is the measurement of a video’s width by height in pixels. For example, a video with a 1920 × 1080 aspect ratio would measure 1920 pixels along the bottom and 1080 pixels in height.

Video resolution depends on a few things, including encoder settings and the capabilities of the camera that you are recording with. Even if your camera is capable of capturing high-resolution content, you may have to experiment with the camera settings to figure out what will produce the best results.

Sometimes, video resolution is referred to by just the height of the video. For example, the 1920 x 1080 resolution can be shortened to 1080i or 1080p. In these abbreviations, “i” stands for “interlaced,” and “p” stands for “progressive.” These two terms refer to how the pixels are displayed on the screen. Progressive is a more fluid image, whereas interlaced is more “pixelated.”

Using resolution to describe the width and height of a video player is called spatial resolution. Spatial resolution is the most common type of resolution in video streaming, but there is also the concept of “temporal resolution.”

Temporal resolution describes the frame rate or the number of frames displayed per second.

Measurements Related to Video Resolution

There are two other measurements that we should discuss before digging further into video resolution: video aspect ratio and video bitrate. Let’s take a look at each of these measurements.

Video Aspect Ratio

Video aspect ratio is the width-to-height ratio of a video. This number is generated by simplifying the ratio of the video resolution.

For example, a video with a 1920 x 1080 resolution would have an aspect ratio of 1920:1080. This figure is simplified to 16:9 by reducing each side by the greatest common multiple. In this case, it is 120.

The most common video aspect ratio is 16:9. This is used for most video players on both modern televisions and mobile streaming devices. In the past, 4:3 was the standard since it was suitable for the size of older television screens, but this has mostly been phased out.

Some social media platforms use different aspect ratios. For example, 9:16 is the standard for video sharing on TikTok and any platform that uses “Stories.” Instagram had previously only supported streaming with a 1:1 aspect ratio, but this has since become more flexible.

Video Bitrate

Video bitrate, on the other hand, measures how much data is being transmitted over a specific amount of time. In video streaming, bitrate is often measured in the unit “kilobits per second,” or ”kbps.” Bits per second (bps) and megabits per second (Mbps) are also used.

Common Video Resolutions

Understanding and knowing the most common video resolutions will help you select the best video quality for your requirements. Below are the standard video resolutions:

• SD (Standard Definition): 480p, 4:3 aspect ratio, 640 x 480 pixels. Suitable for basic viewing. Often used in older content and broadcasts.
• HD (High Definition): 720p, 16:9 aspect ratio, 1280 x 720 pixels. Offers better clarity. Ideal for general viewing on smaller screens.
• Full HD (FHD): 1080p, 16:9 aspect ratio, 1920 x 1080 pixels. Common for most modern content. It provides excellent detail and clarity.
• QHD (Quad HD): 1440p, 16:9 aspect ratio, 2560 x 1440 pixels. Offers higher resolution than Full HD. Great for high-quality video and gaming.
• 2K Video: 1080p, 1:1.77 aspect ratio, 2048 x 1080 pixels. Slightly wider than Full HD. Used in some professional formats.
• 4K Video or Ultra HD (UHD): 2160p, 1:1.9 aspect ratio, 3840 x 2160 pixels. Provides ultra-high definition. Perfect for large screens and high-end productions.
• 8K Video or Full Ultra HD: 4320p, 16:9 aspect ratio, 7680 x 4320 pixels. The highest current resolution. It delivers unparalleled detail and clarity for future-proofing content.

HD vs. SD

Over the past decades, we’ve witnessed a massive transition from standard definition (SD) to high-definition (HD) streaming. HD streaming (or better) is definitely the norm at this time. Just about any new television will come with HD streaming at the absolute least.

The only thing that is keeping SD hanging on by a limb is bandwidth constraints. Sometimes broadcasters drop to SD to make their streams more suitable for streaming over slower internet or to ration bandwidth allotments.

It is also important to note that SD is more commonly used with older television sets that support streaming with a 4:3 aspect ratio. Since these television sets are rather outdated, standard-definition streaming is inching towards death.

The bottom line is that most modern broadcasters are using HD streaming or better.

What is the Best Video Resolution?

Many broadcasters are left wondering what the best video resolution is, and it is difficult to answer that question. There is not one single “best” video resolution. Different resolutions are suitable in different use cases.

For optimal video quality, you must select the right resolution for your needs. For example, YouTube influencers often use Full HD (1080p) for clear, professional-looking content that looks great on both computers and mobile devices. Streaming services such as Netflix offer 4K Ultra HD (2160p) for their best movies and TV shows, providing incredible detail and the most vibrant colours on larger screens. Furthermore, gaming enthusiasts often prefer QHD (1440p) to balance performance with quality. And HD videos (720p) are perfect for quick uploads and less demanding content.

Each of these HD resolutions caters to specific needs and ensures the best viewing experience.

How to Check Video Resolution

To check video resolution and understand its quality, there are a few simple steps to follow. First, video resolution refers to the number of pixels displayed on the screen, which impacts clarity and detail. Some of the most common resolutions include HD (1280×720), Full HD resolution (1920×1080), and 4K (3840×2160).

To determine a video’s resolution on your computer, right-click the video file and select “Properties” (Windows) or “Get Info” on Mac. Under the “Details” or “More Info” tab, look for the resolution. Typically, this is displayed as width x height, such as 1920×1080.

When using media players such as VLC, you can check the resolution by opening the video and then selecting “Tools”. Then, select “Codec Information”. The “Resolution” field will show thedimensions for HD video and other resolutions.

It’s important to understand the video quality types and differences. HD video resolution (720p) is suitable for basic viewing, but it’s rather dated and most screens and devices can display more. Full HD video (1080p) offers superior clarity for most purposes. The term “1080p” refers to 1080p video resolution. What does 1080p mean? It refers to the video having 1080 horizontal lines of vertical resolution. This provides excellent image resolution.

Knowing how to check video resolution ensures you choose the best video quality for your needs. Whether it’s streaming, editing, or general viewing, knowing and understanding video screen resolution and video sizes helps you select the best video resolution for optimal video quality.

Multi-Bitrate Streaming: Different Qualities for Different Viewers

As we mentioned, sometimes streaming at a high resolution is great in theory, but when even a small part of your audience has slow or unreliable internet, this is simply not possible.

Multi-bitrate streaming comes in handy for broadcasters who want to accommodate every viewer in your audience, no matter what sort of internet connection they have. This helps to reduce lagging and buffering, which are two things that can hinder a viewer’s experience.

With multi-bitrate streaming, you can distribute multiple renditions of a video stream that are of different sizes. This accommodates different internet connections by sending the optimal version of the video based on the viewer’s internet speed. That means that viewers with slower internet will be delivered a smaller rendition, and viewers with faster internet will be delivered a larger rendition.

Multi-bitrate streaming paired with an adaptive bitrate video player makes it possible to automate the entire process. This is a more advanced alternative to a more dated setup that requires that viewers manually choose a video resolution.

Not all streaming platforms or broadcasting software offerings support multi-bitrate or adaptive bitrate streaming.

YouTube Video Resolution and YouTube Video Dimensions

When uploading videos to YouTube in 2024, understanding video resolution and dimensions is crucial for achieving the best video quality. YouTube supports various standard video resolutions including HD screen resolution (1280×720), Full HD (1920×1080), and 4K (3840×2160).

For broadcasters, the best settings maximize visual quality while ensuring maximum compatibility across devices. For HD screen resolution, 1280×720 is ideal for basic content. Furthermore, 1920x1080p is perfect for Full HD resolution, which offers crisp, detailed imagery suitable for most viewers. For the absolute best quality, especially for larger screens, 4K resolution at 3840×2160 is the best video quality.

YouTube video dimensions should match the following resolution to avoid black bars, stretching, or other distortions. Common standard video sizes include:

• 720p HD: 1280×720
• 1080p Full HD: 1920×1080
• 4K Ultra HD: 3840×2160

A video resolution chart can help you in selecting the appropriate resolution for different content and devices. For example, the resolution for HD is great for quick uploads and mobile viewing. On the other hand, Full HD and 4K, are preferred for high-quality broadcasts and larger screens.

Understanding video screen resolution settings and utilizing the best ones ensures your content looks its best across all platforms and devices.

How to Change a Video’s Display Resolution

There are several reasons why a broadcaster would want to change their video resolution. In a perfect world, every viewer would have lightning-fast wifi and bandwidth would be free. However, that is not the reality.

Broadcasters can change the video’s display resolution by manipulating their video encoder settings. All encoder settings must be properly configured to work with your chosen online video platform.

Bitrate Settings for Resolution

How you configure your bitrate settings plays a major role in the outcome of your video resolution.

You can select one of the following video configurations and ensure your encoder is set up with these exact settings to help prevent streaming issues:

Encoder Settings on Dacast

How you configure your encoder settings will determine the quality of your live stream. In some situations, using the wrong setup can cause your stream to malfunction, so you must choose the best encoder settings for your setup.

The following settings are required for live streaming with Dacast, regardless of your selected resolution and bitrate:

Conclusion

As a broadcaster, it is important to understand video resolution. Knowing how to control video bitrate can help you provide a better user experience for your viewers.

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In the meantime, check out the Knowledgebase area on our website. It features a wide variety of documentation on video resolution, multi-bitrate streaming, and Dacast-specific functions. Browse topics or search for keywords. Either way, you’ll find a ton of useful broadcasting information.