Storage video requires a lot of storage space. In order to achieve this manageability, video compression techniques are developed to compress video, also known as codec. In 2003, the codec H.264 (commercial name is AVC) is released. It is now a video compressed industry standard because it provides a good compression, which can be played on any device and platform. All modern browsers, operating systems and mobile platforms support H.264.
H.265 / hevc
After ten years of IT industry, the subsequent version of H.264 was released in 2012, called H.265 (commercial name HEVC). The HEVC is committed to a significant reduction in the same video quality. Significantly save storage and bandwidth, means that you can install a 5IP security camera in your previous location, you can install 10 after using H.265.
Although H.265 was released by approximately 5 years ago, it was very slow. The main reason is that H.264 with 1 patented pool has three patented pines with different pricing structures and conditions. The second patented pool (HEVC Advance) was launched in 2015, which was launched 3 years. This unclearness in the case of H.265 is hindered by adopting, so the primary browser does not support (for example, Chrome, Firefox) or only partial support (EDGE). Therefore, many content providers insist on using H.264 because at least they know it will play.
AV1
In 2015, the Open Media Alliance was launched by several large IT companies such as Google, Microsoft, Mozilla and Cisco, aimed at creating an open space named AV1 and tax decoder. Based on Google Open 'VP10' Codec, Cisco 'Thor' and Mozilla '' Daala 'Codec Technology, the alliance will create an alternative to H.265. The codec is a powerful competitor of H.265, which has the following points:
Royalty Free Av1 is completely Royalty Free, it means that it is not necessary to pay a patent fee to any patented pool. Google has proven to release a VP9 codec. In addition, the codec will be open source, with very loose BSD licenses, can accelerate. Better compression is about 30% better than H.265 / HEVC according to the baseline you use. Significantly improved under reasonable CPU costs. Compared to HEVC, AV1 will also display these improvements on a low bit rate camera, which is especially useful for IP security cameras. Play Apple, Google, Microsoft, and Mozilla everywhere, we can expect all mainstream browsers and operating systems in the near future. Using this new codec, the support of H.265 in the main browser is unlikely. Unlike H.265, AV1 support has been provided in Firefox's development versions. Hardware accelerated decoding video requires a lot of CPU. Many of the devices such as laptops, mobile phones or tablets have hardware acceleration, which prevents heating equipment and battery depletion AV1 to get support for major chip vendors such as Intel, AMD, Broadcom, and ARM. We need to see the first batch of equipment included with AV1 at least 1 year, but hardware support looks great. Content provider supports AV1 main content providers such as Netflix, Facebook, YouTube, BBC, Amazon, and Hulu will provide AV1 content. YouTube has provided 4K video through its own VP9 codec to resist HEVC. Therefore, it is currently unable to play on the Apple device.
How will AV1 affect video surveillance industries?
The manufacturer of IP security cameras is now slowly adopting H.265 in their secure camera, but there is still a problem in playing video in mobile devices and browsers. The solution is to turn the video from H.265 to another, but this has a lot of shortcomings:
Code conversion means to decompress the video and compress the video again in different formats. This usually takes time and accompanied by ** "encoding delay" **. Therefore, your real-time video is not as real as you expect. Transcoding requires a lot of CPUs, and you can only transfer some video streams at the same time. This increases the cost of any video surveillance platform, whether it is a cloud or a traditional video recorder. Transcoding will reduce video quality. The codec is compressed by discarding video data. Once deleted, it cannot be recovered again. When compressed video each time, the codec will discard the video data, resulting in a decline in quality. To prevent transcoding, it is important to support the safety camera and equipment that people use the same codec. Now there is HEVC, the camera starts support it, but popular client devices still lack support.
Using AV1, most platforms can add support quickly (Firefox is already in the development version). The problem is: When will we see the first batch of IP security cameras?
The next industry standard is H.265 or AV1 is not clear. Obviously, when one of the two becomes dominated, we will support it.
Originally from: https://www.een.com/h-265/
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