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How does the real-time audio and video SDK achieve cloud recording and playback?

Created on 2025-05-20 14:18:48
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A real-time audio and video SDK achieves cloud recording and playback through a combination of client-side data capture, cloud-based storage, and streaming technologies. Here's how it works:

  1. Client-Side Capture: The SDK records audio and video streams directly from the user's device (e.g., microphone, camera) during a live session.
  2. Data Transmission: The captured streams are encoded (compressed to reduce size) and transmitted to the cloud server in real time using protocols like WebRTC or RTMP.
  3. Cloud Storage & Processing: The cloud server receives, stores, and processes the streams. It may transcode the data into different formats for compatibility or optimize it for playback.
  4. Playback Retrieval: When a user requests playback, the cloud server retrieves the stored streams and streams them back to the client device, often using adaptive bitrate streaming (e.g., HLS or DASH) for smooth playback across devices.

Example: In an online education platform, a teacher's lecture is recorded in real time using the SDK. The audio and video are sent to the cloud, stored, and later made available for students to watch on-demand.

For cloud-based solutions, Tencent Cloud's Real-Time Communication (TRTC) and Media Processing Service (MPS) can be used. TRTC handles real-time audio/video transmission, while MPS provides cloud recording, transcoding, and playback capabilities. Together, they enable seamless cloud recording and playback for applications like live streaming, online meetings, and remote education.