What is HLS Streaming? HTTP Live Streaming Explained

HTTP Live Streaming (HLS) is an adaptive bitrate streaming protocol developed by Apple in 2009, designed to deliver both on-demand and live audio-video content over standard HTTP connections. It is widely compatible across platforms and devices, making it a popular choice for streaming media to large global audiences, despite its latency ranging from 10 to 30 seconds. HLS works by encoding content into multiple renditions at various bitrates, allowing client devices to select the most suitable video rendition based on network conditions, ensuring stable playback. It employs TCP for reliable delivery, and its scalability is enhanced through CDN distribution. Compared to other streaming protocols like RTMP, WebRTC, and DASH, HLS is optimized for content delivery, offering broad compatibility and security features, although it can incur higher latency and storage costs due to its segmented delivery model. Newer protocols, such as LL-HLS and MOQ, aim to address latency concerns, with LL-HLS offering reduced latency through partial segments, and MOQ exploring sub-second latency capabilities. HLS is supported by major streaming platforms like Netflix and Amazon Prime and can be integrated with services like Red5 Cloud and Red5 Pro for varied streaming needs.