# H.264 vs H.265: What Are They? Which Is Better? We often come across H.264 and H.265 in camera recording formats. But what exactly do they mean? Some people believe H.264 is more universal and superior. Others claim that, compared with H.264, H.265 offers more advanced encoding, enabling longer video recording, lower storage demands, and better image quality. By now, you may have various questions about H.264 versus H.265. In this article, we aim to clarify the differences between these two video coding standards, so let’s dive right in. 1. Why Do We Need Video Coding? In short, video coding is essential for compressing video and reducing the requirements for transmission bandwidth and storage space. As you know, video is made up of frames. Let’s take a single image as an example. To display a full HD image with a resolution of 1920×1080, a total of 1920×1080×8×3 bits are required. Here, 1920×1080 represents the number of pixels, 3 stands for the RGB color channels, and 8 bits refers to the bit depth of each pixel value. Therefore, one single image has a total size of approximately 5.9 MB. Now what about watching a 1920×1080 video? Today, videos are typically recorded at 30 frames per second (fps). If you do a rough calculation, you would need 30 images of 5.9 MB each per second. That adds up to about 177 MB of bandwidth per second. It is easy to see that raw video signals contain an enormous amount of data, which clearly exceeds the capacity of modern networks. Therefore, video compression coding is critical for transmitting video over networks while saving bandwidth and storage. 2. What Is a Video Codec? A video codec is a powerful tool that makes video files smaller and better. It compresses large volumes of data into a compact space, allowing you to watch videos online or store them on devices without any hassle. A video codec also ensures videos look sharp and play smoothly. It can correct errors and artifacts that occur when reducing file size. Without video codecs, videos would be extremely large, slow to transfer, and low in playback quality. There are many types of video codecs, but the two most popular ones are H.264 and H.265. They are the dominant standards in video coding and are used by countless video websites and applications such as Netflix and YouTube. 3. What Is H.264 (AVC)? H.264 is a method of reducing video file size without significant quality loss. It is also known as AVC or MPEG‑4 AVC. It is widely used for online video streaming and storage on media such as DVDs and Blu‑ray discs. Thanks to Apple’s decision to adopt H.264 instead of Adobe’s VP6 codec, this standard has reached hundreds of millions of homes alongside hundreds of millions of iPads and iPhones. It has become the undisputed leader in video coding, with a market share of over 80%. H.264 delivers good video quality even at low bit rates. It supports high-quality video with various color and luminance levels, and handles different types of content such as television broadcasts. H.264 divides each video frame into small blocks (up to 16×16 pixels). It then compares these blocks with previous and subsequent frames to find the most efficient way to store them. During playback, the same comparison logic is used to reconstruct the blocks, resulting in smooth and clear video.

The main advantage of H.264 is its superior data compression ratio. At the same image quality level, H.264 offers a compression ratio more than twice that of MPEG‑2 and 1.5 to 2 times that of MPEG‑4. For example, if the original file size is 100 GB, compressing it with the MPEG‑2 standard reduces it to 4 GB, giving a compression ratio of 25:1. Using the H.264 compression standard, however, shrinks it to just 980 MB, achieving an impressive compression ratio of 102:1 — from 100 GB down to 980 MB. The high compression ratio of H.264 plays a critical role in low‑bitrate applications. Compared with compression technologies such as MPEG‑2 and MPEG‑4, H.264 significantly saves users’ download time and data usage costs. Notably, H.264 not only provides a high compression ratio but also delivers high‑quality, smooth images. This is why video data compressed with H.264 requires less bandwidth during network transmission, making it more cost‑effective. 【Advantages】 Reduces demand for video storage Compared with other formats, H.264 features lower bitrates, lower bandwidth usage, and higher resolution for surveillance. 【Disadvantages】 Requires more bandwidth Not the highest‑quality codec available. IV. What is H.265 (HEVC)? H.265 is a newer method to make video files smaller and better. It is also known as HEVC or MPEG‑H Part 2. It outperforms older standards such as H.264 or AVC by preserving more details and colors while using less space. H.265 supports high‑quality video up to 8K resolution with improved brightness and contrast. It also handles fast‑moving video effectively, making it ideal for online streaming and on‑device playback. Instead of using fixed blocks to store video frames, H.265 uses flexible units that can vary in size and shape, making it more intelligent and precise. H.265 requires more powerful devices to operate, but it also consumes less internet bandwidth and power. It represents the future of video compression.

Thanks to algorithm optimization, H.264 enables standard-definition digital video transmission at below 1 Mbps. On the other hand, H.265 makes it possible to deliver regular 720P HD video and audio (1280×720 resolution) at a transmission speed of 1–2 Mbps. H.265 enables higher-quality online video streaming with limited bandwidth, requiring only half the bandwidth for the same video quality. This means mobile devices such as smartphones and tablets can directly stream full-HD 1080p video online. The H.265 standard also supports ultra-HD video formats such as 4K (4096×2160) and 8K (8192×4320). It is fair to say that H.265 keeps pace with the "high-resolution" trend of display screens. 【Advantages】 Enables wide adoption Lower cost compared with AVC encoders Delivers stunning visual quality efficiently in data‑limited environments Essential for 4K video Enables easier streaming and downloading 【Disadvantages】 Limited compatibility with devices and browsers due to low widespread adoption Requires more powerful hardware --- ## V. H.264 vs H.265: What Are the Differences? H.264 and H.265 are two methods to reduce video file size while maintaining quality. Both save storage space and bandwidth while preserving high video performance. H.264 is an established standard widely used and supported by most users. It works with nearly all videos and devices, and is compatible with streaming services such as Netflix and YouTube. H.265 is a newer and more efficient standard than H.264. It can reduce video files to roughly half the size of H.264 at the same quality, and supports higher‑definition video with greater detail. However, H.265 is less universally compatible. It requires more processing power and time to encode/decode. It is not as widely supported as H.264 and may not work on some older devices.

As can be seen from the table above, H.265 outperforms H.264 in most aspects. It requires only half the bandwidth of H.264 while maintaining the same video quality. So which one should you choose? It depends on your needs. If you want a fast and simple way to produce video files, H.264 may be more suitable for you. If you want a more advanced and efficient method, H.265 may be a better choice. Whichever you choose, you can enjoy excellent video quality. Extra tip: Most online video platforms only support H.264, making it a safe and reliable choice. ## VI. H.264 vs H.265: Which Is Better? H.264 and H.265 are two methods to reduce video file size while maintaining high quality. Both save storage space and bandwidth. H.264 and H.265 each have their own advantages and disadvantages. The best one for you depends on your requirements. You can always try both to see which you prefer. However, in terms of pure performance, H.265 is superior to H.264. Compared with H.264/AVC, H.265/HEVC offers a wider range of tools for bitrate reduction. As mentioned above, the coding units of H.265/HEVC are larger in areas with less information (such as flat gray ground with little color variation), resulting in fewer coded bits. In contrast, areas with rich details are divided into increasingly smaller macroblocks, generating more coded bits. This is equivalent to focused encoding on the image, which lowers the overall bitrate and improves coding efficiency. At the same time, H.265 supports 33 intra prediction directions (H.264 only supports 8), and provides better motion compensation and vector prediction. According to numerous quality tests, H.265 can reduce video stream size by 39–44% compared with H.264. Results may vary depending on how quality is measured. Viewers watching H.265-encoded videos will also notice the difference: they can enjoy similar or better video quality at 51–74% lower bitrates than H.264. H.265 and H.264 share some features, but the main difference is that H.265 saves much more bandwidth for the same service. The drawback is that H.265 videos require more computing power to decode. ## VII. Frequently Asked Questions About H.264 vs H.265 ### 1. What is the difference between H.264 and H.265? H.264 and H.265 are video compression standards that reduce file size without sacrificing quality. H.265 is more efficient than H.264, delivering better compression or higher quality at the same bitrate. It supports higher resolutions and frame rates, making it ideal for 4K and HD content. However, H.265 requires more processing power and may not be compatible with all devices and platforms. 2. Which is better for video platforms, H.264 or H.265? H.265 is more suitable for video platforms. Compared with H.264, it provides better compression and higher quality at the same bitrate, allowing smaller file sizes and improved video quality. However, compatibility with devices and platforms must be considered, as H.265 requires more processing power for encoding and decoding. 3. Which is better for video editing, H.264 or H.265? H.265 is better for video editing due to its superior data compression efficiency, which can significantly reduce file sizes during import and export. 4. Is it worth converting from H.264 to H.265? It depends on your specific needs. H.265 offers better compression and potentially higher quality at the same bitrate compared with H.264. If reducing file size and saving bandwidth are important to you, it may be worth converting to H.265. However, keep in mind that H.265 requires more processing power and may not be compatible with all devices and platforms. If your current videos are already in H.264 format and you have no specific need for smaller files or improved quality, conversion to H.265 may not be necessary. 5. Does H.265 use more CPU? Yes, H.265 uses more CPU resources and requires more powerful hardware than H.264. It also still lacks widespread support across devices and browsers compared with H.264. VIII. Final Thoughts on H.264 vs H.265 For most users, the difference between H.264 and H.265 can be summarized as follows: for videos of the same duration and specifications, H.264 files are larger but relatively easier to play and edit. H.265 files are smaller but require higher computer specifications for playback and editing. Especially if your graphics card does not support H.265 hardware decoding, using H.265 can be problematic, as relying solely on the CPU is often insufficient. This is why H.264 is considered more universal. However, times have changed. More than 10 years have passed since the release of the H.265 coding format, and in recent years, integrated graphics in many CPUs have begun to support H.265 hardware decoding. For discrete graphics cards, both NVIDIA and AMD have released numerous models supporting H.265 hardware decoding.