H.264 uses advanced algorithms to compress video data into a smaller file size without sacrificing image quality. This makes it ideal for applications where bandwidth and storage are limited, such as video streaming and surveillance.
Some of the key features of H.264 include:
- High compression efficiency: H.264 is able to compress video data by a factor of two to three times compared to previous standards such as MPEG-2.
- High quality video: Despite the high compression ratio, H.264 is able to maintain high quality video images with less pixelation and artifacting.
- Adaptive encoding: H.264 is able to adapt to changes in the video scene, adjusting the compression rate dynamically to ensure the best possible quality while minimizing bandwidth usage.
- Support for various resolutions: H.264 can encode video in a variety of resolutions, from standard definition to high-definition, making it versatile for a wide range of applications.
Overall, H.264 is a widely used and popular video compression standard that has enabled many applications that rely on high-quality video, while minimizing bandwidth and storage requirements.
H.265
H.265, also known as HEVC (High-Efficiency Video Coding), is a video compression standard that was developed as the successor to the H.264/AVC standard. H.265 was developed by the Joint Collaborative Team on Video Coding (JCT-VC), a collaboration between the ITU-T Video Coding Experts Group (VCEG) and the ISO/IEC Moving Picture Experts Group (MPEG).
The main goal of H.265 is to provide higher compression efficiency than H.264, while maintaining high video quality. H.265 achieves this by using more advanced coding techniques, such as larger block sizes, improved motion vector prediction, and better intra prediction modes.
Some of the key features of H.265 include:
- Higher compression efficiency: H.265 can achieve up to 50% better compression efficiency than H.264, which means that it can provide the same video quality with less data or higher video quality with the same amount of data.
- Support for higher resolutions: H.265 supports higher resolutions than H.264, including 4K, 8K, and beyond, making it suitable for high-resolution video applications.
- Improved motion compensation: H.265 uses more advanced motion compensation techniques than H.264, which helps to reduce the amount of data that needs to be transmitted.
- Reduced decoding complexity: H.265 uses more efficient coding algorithms than H.264, which means that it can be decoded faster and with less processing power.
Overall, H.265 is a more advanced and efficient video compression standard than H.264, which makes it well-suited for applications where high video quality and/or high resolution are important, such as video streaming, video conferencing, and surveillance. However, since H.265 is a newer standard, it may not be as widely supported as H.264 on all devices and platforms.
H.264 and H.265 are transport choices, not image-quality guarantees
Both codecs can produce excellent or poor surveillance video depending on bitrate, quantization, GOP structure and the camera image pipeline. H.265 is usually attractive for high-resolution or long-retention systems, while H.264 remains valuable for compatibility with browsers, hardware decoders and older clients. Keeping both options available is often more useful than forcing one codec everywhere.
Choose the codec per channel and use case
SmartVision can work with H.264/H.265 camera streams, allowing archive-heavy channels to use efficient encoding while compatibility-sensitive streams remain on H.264. Storage should be calculated from measured bitrate rather than resolution alone. Continue with Video Compression and Recording.