Even though you might not be familiar with what Adaptive Bitrate Streaming (ABR) is, chances are that you have already used it. Does the familiar “auto” option on YouTube ring any bells? It’s a feature that automatically adjusts the quality of the video depending on the speed on your internet, and thereby, reduces buffering. That’s exactly what adaptive bitrate streaming is!
In this blog, we get into the details of adaptive bitrate streaming, what it is, how it works and more importantly how you can get started on using it for streaming live or on-demand videos.
Adaptive bitrate streaming or ABR is a technology that automatically adjusts video quality, compression and resolution to provide end-users with the best possible quality. Adaptive bitrate streaming definitions usually limit it to “best viewing experience as per the users’ bandwidth”, but that’s just not it because a good ABR technology will optimize the experience for bandwidth, device resolution and CPU power as well.
If you try to search for the history of adaptive bitrate streaming, you’ll find a Wikipedia article that mentions it being created at the WG1 Special Streaming group in October 2002. There are no citations to back this claim so this may not entirely be true. In fact, ABR goes way before 2002 as there is a patent registered to it in 1998. This patent mentions the process of breaking down a video file into a sequence of slices and allowing the end computer to be able to switch between slices based on the download rate. You can always read more on Patent US6389473B1 here.
Video files are first transcoded into multiple versions, each with a different resolution and bitrate. Each of these is suited for different bandwidth conditions and end-user devices.
Each version of the video is then broken down into short 2-10 second chunks. The different versions are bundled up and sent as streams. The chunks allow the player to switch between streams midway depending on the end-users’ device and internet.
The streams also include a master .M3U8 file or manifest file, to act as index and let the player know the chunks available and their order. This index file informs the player about the locations of the different qualities available, and it can request them accordingly.
Adaptive bitrate streaming is mostly delivered using modern protocols such as HTTP Live Streaming (HLS), MPEG-DASH and Microsoft Smooth Streaming.
The major benefit of adaptive bitrate streaming is reduced buffering! And this in turn helps increase your content’s viewership. If internet speeds drop, adaptive bitrate streaming lowers the quality and load time reduces, which helps stop buffering.
Reduced quality is less likely to make users quit watching a video as opposed to buffering, and research comparing the two proves this! Moreover, according to research by MUX, buffering reduces average content viewing time by 39%. According to another academic research, under 800 10-minute tests comprising of 1,449 valid views, initial delay in loading and video stalling resulted in users to quit watching the video.
Buffering could be an issue if you need to deliver an internal training or share a recorded meeting with important information, or simply embed a video advertisement online. If the audiences’ quality of experience matters to you, then you need to reduce buffering and ABR can help you do this.
Adaptive Bitrate Streaming also helps in ensuring device compatibility by delivering a video format that is best suited for the end-user device.
Progressive streaming or Progressive download involves streaming a single encoded file. Progressive streaming also involves breaking down a video file into chunks, but unlike ABR, the player can’t dynamically switch between different quality options. Progressive streaming is perfectly fine if the end-user’s device supports the video format and resolution and has a high-speed internet connection. However, if the internet speed is low or if resolution levels do not match that of the stream, it will cause issues.
Even with high internet speeds, a 720p video file won’t look the best on a 1080p screen. Moreover, a 720p video file may buffer on a slow internet connection.
Read More: What is Video Streaming?
There are two ways to get started on streaming with adaptive bitrate streaming:
You can opt for our product VIDIZMO EnterpriseTube, if you choose the latter option. When opting for our solution, you get your own YouTube-like video platform where you can upload your videos. The playback experience is as good as YouTube and your viewers get to benefit from minimal buffering through means of ABR.
VIDIZMO helps you do much more:
VIDIZMO EnterpriseTube is a complete enterprise video platform, such that you can use one platform for all video use cases. Whether it be archiving old videos, or making large files playback-ready, or sharing confidential meeting recordings or embedding a product demo on your website. You can use one platform to do it all, and not worry about playback functionality as adaptive bitrate streaming, transcoding and various other workflows do this automatically at the back.
Contact us for a product demonstration or other queries, or sign up for a free trial and get started on using VIDIZMO today.