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External encoding guidelines

Last Updated: Nov 26, 2017 09:38PM CET

Overview

SlideSync works with live encoding equipment that supports the RTMPS or RTMP protocols.

Primary and backup streams

SlideSync accepts both a primary and a backup stream. Failure to send a backup stream, or sending primary and backup streams from the same device puts your event at risk of intermittent outages!

Internet connectivity requirements

A stable internet connection is crucial to the success of your live event. See our page on Internet connectivity requirements for more details.

Recommended encoding settings

Video

  • Video
  • Codec: H.264
  • Resolution and bitrate:
    • 720p: 1280 x 720px (720p), 1.5 - 4.0 Mbit/s
    • 1080p: 1920 x 1080px, 4.0 - 10.0 Mbit/s
  • Frame rate: 25 fps
  • Keyframe interval: Every 2 seconds or every 50 frames
  • Encoding: CBR

Audio

  • Codec: AAC
  • Bitrate: 96 - 128 kbit/s
  • Sample rate: 44.1 KHz or 48.0 KHz

Advanced settings

  • Pixel aspect ratio: Square
  • Frame types: Progressive Scan
  • Entropy coding: CABAC
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