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CBR vs VBR: Constant vs Variable Bitrate for Live Streaming

Constant or variable bitrate? What each rate-control mode does inside the encoder, the peak limits HLS and YouTube set, capped VBR and two-pass VBR, and where the choice sits in a video SDK.

Frame Rate (FPS) Explained: What Frames Per Second Means & Which Frame Rate to Use?

Frames per second is the count of images in each second of video, and the rate you choose decides how motion looks, how much bitrate you need and how long your GOP runs. Here are the standard rates, what Apple, YouTube and Amazon IVS ask for, and what variable frame rate does to an encoder.

What is a Keyframe? Keyframe Intervals and GOPs Explained

A keyframe is the complete picture a decoder can start from, and the keyframe interval decides how fast a viewer can join, seek or switch quality. Here are the frame types, the GOP, the intervals Apple, YouTube, Amazon IVS and Cloudflare ask for, and what OBS auto really sets.

Poor Call Quality: How to Test VoIP & WebRTC Call Quality?

Poor call quality has a cause you can measure. A five-step VoIP and WebRTC call quality test, the thresholds to compare against, a symptom-to-cause table, and fixes for the network, QoS, app settings, and SIP-connected AI voice agents.

Noise Suppression for Voice & Video Calls

Noise suppression removes background sound from a microphone signal while keeping the voice. How classic and AI denoisers work, how they differ from noise reduction, echo cancellation and gain control, and how to add noise suppression in the browser, in mobile apps and with VideoSDK.

What Is QoE (Quality of Experience)? QoE vs QoS, MOS Explained

QoE, or quality of experience, is what the participant took away from a call, while QoS is what the network delivered. The ITU definition, a QoE vs QoS table, the metrics that matter for real-time video, and three ways to measure QoE in production.

What is Video KYC (vKYC)?

VKYC, or video KYC, verifies a customer's identity over a live, recorded video call with a trained official. What RBI's 2025 KYC Directions require, the eight-step V-CIP process, VKYC vs eKYC vs physical KYC, why calls fail, and the video technology behind it.

Video Encoding Explained: Encoding vs Transcoding vs Codecs

Video encoding compresses raw frames into a stream a network can carry, and transcoding converts one encoded stream into another. The main codecs and containers, hardware vs software encoders, and how real-time video calls encode differently, with VideoSDK's encoder presets.

What is a Video Chat API? Pricing and How to Add One

A video chat API runs the rooms, tokens, signaling, TURN relays and media servers behind a live video call. What it is, how it differs from a video chat SDK, what VideoSDK, Twilio Video, Agora and Daily charge per participant minute, and the steps to add one to your app.