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What is Real-Time Video?

Real-time video is captured, processed, transmitted, and displayed with latency low enough for immediate observation or interaction. The acceptable delay depends on the application rather than one universal threshold.

How Real-Time Video works

End-to-end real-time latency accumulates across capture, frame buffering, encoding, packetization, network transit, jitter buffering, decoding, and display scheduling. Interactive systems constrain each stage and continually trade resilience or compression efficiency for a shorter response loop. This places real-time video in contribution, conferencing, monitoring, and control workflows, where a stable low delay often matters more than achieving the smallest possible stream.

Key facts

  1. Glass-to-glass latency includes capture and display, so a transport round-trip or player buffer measurement alone cannot characterize the viewer’s full interaction delay.
  2. Long prediction structures and frame reordering can improve compression but add encoder or decoder delay. Low-latency modes restrict such lookahead and dependency choices.
  3. A smaller jitter buffer reduces delay but absorbs less variation in packet arrival. Loss recovery that waits for retransmission can likewise preserve quality only by spending latency.

When Real-Time Video matters

Prioritize low latency for conferencing, remote control, telemedicine, gaming, or live collaboration. Smaller buffers improve responsiveness but provide less protection against network jitter and throughput drops.

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