昨天,用于支持开放媒体联盟的沉浸式音频模型和格式(IAMF)的初始代码被合并为广泛使用的FFmpeg多媒体库。
沉浸式音频模型和格式(IAMF)规范用于为用户提供身临其境的音频体验。开放媒体工作联盟由沉浸式音频(IA)模型、独立IA序列格式和基于ISO-BMFF的IA容器格式组成。IAMF在其规范作为:
“IAMF用于提供沉浸式音频内容,以便在流媒体和离线应用程序中的各种设备上进行演示。这些应用包括互联网音频流、多播/广播服务、文件下载、游戏、通信、虚拟和增强现实等。在这些应用中,音频可以在各种各样的设备上回放,例如,耳机、手机、平板电脑、电视、条形音箱、家庭影院系统和大屏幕。”
昨天被合并到FFmpeg引入了“AVStreamGroup”的概念,登陆了一个沉浸式音频模型和格式API,IAMF解复用器支持,以及IAMF多路复用器在准备这一初始IAMF支持的其他更改中。
The first approved version of the IAMF reference library (libiamf) was released in September and the latest specification for IAMF as of November is considered a working group draft. While AOMedia is best known for its AV1 video codec work, IAMF is the organization's first audio specification release and does maintain royalty-free licensing. Stated goals for IAMF include spatial audio for all devices, flexible audio delivery, and being creator-friendly. With now having IAMF support merged into FFmpeg, that's good news for adoption moving forward.