How to get clean, professional audio into a live stream — taking a dedicated broadcast send off the sound board, the broadcast mix versus the house mix, embedding audio into SDI, audio-to-video sync, loudness targets for streaming, and a concrete end-to-end broadcast audio chain.
Church-Tech
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Audio for Live Broadcast -
Camera Operation and Directing Styles The craft side of live broadcast — the language of shots, framing rules like headroom and lead room, slow deliberate PTZ moves versus jerky ones, when to cut and when to hold, covering a sermon versus covering music, directing a multi-camera service on a headset, the single-operator preset workflow, and how to train a volunteer team to a repeatable standard.
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Cameras and Switchers: PTZ, SDI, and the Blackmagic ATEM Choosing and deploying PTZ cameras and a video switcher for live broadcast — PTZOptics camera options, SDI vs NDI outputs, camera placement for a stage or sanctuary, the Blackmagic ATEM lineup compared, VISCA-over-IP control, PTZ presets, tally lights, and multiview monitoring.
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Planning a Live Broadcast: Signal Flow and System Design The foundational mental model for broadcasting a meeting or church service — the camera-to-stream signal chain, SDI vs HDMI vs NDI, resolution and frame rate decisions, cable runs, budget tiers, and the reliability-first mindset that separates a smooth live broadcast from a disaster.
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Software and Encoding: OBS, vMix, and the Mac Mini Picking the production and encoding layer for a live broadcast — OBS Studio vs vMix vs dedicated hardware encoders, running a whole show on an Apple Silicon Mac mini, capture cards, ProPresenter graphics over NDI and Syphon, recording a clean archive while you stream, and when an encoder appliance beats a computer.
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Streaming and Distribution How a live broadcast actually reaches the internet — RTMP/RTMPS and SRT contribution, HLS delivery, the platform choice between YouTube, Vimeo, BoxCast and Resi, multistreaming, the bitrate and keyframe settings that keep a stream alive, internet redundancy with bonding and store-and-forward, monitoring stream health, and embedding a player on your own site.