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Usage Limits

Default capacity, file size, and rate limits per customer environment. All defaults can be raised on request.

Each HotMic customer environment is configured for their specific scaling needs. All limits listed below can be increased by contacting HotMic.

File Sizes

  • Profile Picture PNG/JPG, approximately 256x256. Limit: 1028x1028 max, smaller is better.
  • Thumbnail / Break / End Slate PNG/JPG, 1280x720 or 720x1280. Resized automatically.
  • Clip Upload MP4 or WebM. Limit: 2GB max file size.

Platform Limits

  • Max Simultaneous Live Streams 10*
  • Max Simultaneous VOD Streams No limit
  • Max Viewers Per Stream 250,000*
  • Max Simultaneous Viewers (All Streams) 250,000*
  • Max Hosts Per Stream 6 (1 host + 5 co-hosts)*
  • Max Recording Co-Hosts 5 co-hosts per recording*

*All limits can be increased. Contact HotMic for higher capacity.

Host Machine Recommendations

  • Machine PC, Mac, or Linux equivalent to a 2018 MacBook Air or newer.
  • RAM At least 8GB.
  • CPU 2+ cores, 1.6+ GHz base, 3.0+ GHz turbo.
  • GPU Recommended (not strictly required).
  • Download Speed Minimum 1 Mbps dedicated.
  • Upload Speed Minimum 1 Mbps dedicated.
  • Browser Google Chrome or Microsoft Edge.
  • Microphone Headset with microphone recommended for best audio quality.

Performance has been tested successfully on lower-powered devices including 2018 Chromebooks, but higher-spec machines are recommended for the best experience.

Scalability

HotMic's infrastructure is designed for high-scale events:

  • Video delivery via CloudFront CDN handles effectively unlimited viewer scale.
  • Chat tested up to 10,000 messages per minute without breaking.
  • Polls tested up to 5,000 responses per minute.
  • Stream joins up to approximately 2,000 concurrent joins per second.
  • Load testing shows normal performance up to 480,000 concurrent users on a standard cluster.

Contact HotMic at least 2 weeks in advance if you expect more than 250,000 concurrent users across all streams, so infrastructure can be scaled appropriately.

Infrastructure Overview

  • Host browser — Minimal requirements. The Composer Service handles video composition server-side.
  • Composer Service — AWS EC2 instances that combine host video, media, and overlays into a single output.
  • RTMP to HLS — Conversion pipeline. Default limit of 10 simultaneous conversions per account.
  • Video CDN — CloudFront distribution for viewer-scale delivery.
  • SDK — Viewers receive video from CDN plus chat, polls, and other updates via the Platform API.
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