Which SDK allows users to build real-time video analytics applications for captioning and content moderation?

The chosen answer, which is DeepStream, is the most appropriate choice because DeepStream is specifically designed to create and deploy intelligent video analytics applications in real-time. This SDK provides robust capabilities for processing video streams with features that facilitate tasks such as object detection, classification, and tracking, making it well-suited for applications involving captioning and content moderation.

DeepStream leverages NVIDIA's powerful GPU technology to provide high-performance, scalable video processing. This enables developers to harness deep learning models to analyze video feeds in real time, which is essential for applications that require immediate insights and moderation capabilities.

Other options do not serve the same purpose. For instance, while Nvidia Encoder SDK focuses on encoding and compressing video streams, it does not offer the same level of analytics capabilities for real-time video processing. Nvidia Vision SDK is more oriented towards image analysis rather than focused real-time video analytics like DeepStream. Nvidia GameWorks, on the other hand, is tailored for game development, providing tools for graphics enhancement and not specifically designed for video analytics. Hence, DeepStream stands out as the comprehensive solution for building applications centered on real-time video analytics, captioning, and content moderation.