With this high-level concept of HDR, let's move on to review video editing workflows.īefore I get to the details, I would like to direct your attention to the previous WWDC sessions on video editing. To get a more detailed introduction to HDR, I recommend you check out the HDR Export session of this year's WWDC. Apple supports both types of transfer functions. HDR video comes with either HLG, or PQ transfer function. Transfer functions describe how scene linear lights is mapped to nonlinear code values in the video, and then back to display light. To accommodate the larger luminance and color range, HDR is also typically associated with higher bit depths, with 10-bit common for distribution media. In other words, it can produce colors you have never seen in any SDR video. The combination of Wide Color and high dynamic range can define a much larger color volume. HDR is often implicitly paired with Wide Color.

HDR video can go 100 times brighter all the way up to 10,000 nits. To give you a quantitative idea, SDR video is limited to up to 100 candelas per square meter, or nits. It greatly extends the dynamic range of the video above and beyond what is capable by standard dynamic range video.īecause of this, you can produce more vibrant videos with brighter whites and deeper blacks, better contrast and more details in shadows and highlights. Now, what's HDR? HDR stands for high dynamic range. At the end, we'll touch upon HDR playback.

We will also discuss some finer controls you can have in configuring the HDR editing, mainly about the color properties. Then we'll talk about how to enable HDR on them. We will start with a very quick introduction to HDR followed by a video of different video editing workflows. In this session, I will show you how you can take advantage of that, using AVFoundation.

This year, we're also adding HDR support in our framework to enable HDR for video editing. Apple brought HDR play back on iOS a couple of years back, and on macOS last year. Today I'm going to talk about HDR video editing and play back using AVFoundation.

Hdr editing after effects