Enhancing HDR on Instagram for iOS With Dolby Vision

This post details the technical implementation of Dolby Vision and ambient viewing environment (amve) metadata support for HDR videos on Instagram for iOS. It describes the challenges of preserving and processing this metadata through client and server stages, including modifications to FFmpeg and Shaka packager to support Dolby Vision Profiles 8 and 10. The post also covers the implementation of manual Dolby Vision metadata extraction for AVSampleBufferDisplayLayer and the iterative A/B testing process to optimize for performance, including the adoption of compressed metadata formats and client-side decompression to reduce load times and improve user engagement.