Per-Title Encoding Optimization and Workflow

Learn more about encoding optimization at 流媒体东部2020.

Read the complete transcript of this clip:

史蒂夫·盖革: The goal here of per-title encoding is to optimize the bitrate ladder for every single encode, and then what that's going to do is allow us to really focus and try to fit into that relatively narrow band that the human perceptual system can see. So if you go above that, you're going to waste a lot of bits in your encodes. If you go below that, you're going to see a lot of artifacts that your users are going to pick up on. 最终, what this allows us to do is try to reduce the amount of cost and improve the amount of quality that we want to put into every encode.

这就是它的工作原理. We're talking about bitrate reduction, 这就等于省钱. We'll talk about storage reduction, 这就等于省钱, but then there's also the quality improvement aspect here, which means that these are a better experience in every dynamic. Some things that people don't think about often when we talk about per-title encoding is that it provides a consistent perceptual quality across the media library. If I'm always optimizing for that perceptual band, then you get a really consistent amount of quality across your scenario. That also allows you to get better performance in low-bandwidth scenarios, beecause we're not including 步大小, and it gets a better quality to those users who are ready to maybe reduce infrastructures.

我们的技术就是这样运作的. 它是非常可添加的. We do an overall complexity analysis of the file, taking samplings across the whole asset, and then we do what we call a convex hull prediction, which ultimately amounts to doing a lot of sampling goods and using an algorithm to pick where all of those different bitrates and 决议s perform best, and then trying to draw the smoothest curve that we can within that perceptual bend.

Something that we try and also give is not just the optimal set of encodes, 但也, everybody has different business constraints, and so we try to give you a lot of flexibility, 上界的设置, 下界, 步大小, 目标质量水平, things like this that make it a little bit more business-friendly for people who have specific use cases.

免费的

合资格订户

现在就订阅最新一期过去的问题

Buyers' Guide: Per-Title Encoding

In per-title encoding, an encoding service creates a unique encoding ladder for each video file. While available for live streaming, per-title encoding is most often utilized with video on demand.

2022年3月24日

The Past, Present, and Future of Per-Title Encoding

Video encoding began as a one-dimensional data rate adjustment that reflected the simple reality that all videos encode differently is now a complex analysis that incorporates frame rate, 决议, 色域, 动态范围, as well as delivery network and device-related data, along with video quality metrics.

2021年6月29日